WO2014199136A1 - Flexible rfid tag assembly - Google Patents

Flexible rfid tag assembly Download PDF

Info

Publication number
WO2014199136A1
WO2014199136A1 PCT/GB2014/051777 GB2014051777W WO2014199136A1 WO 2014199136 A1 WO2014199136 A1 WO 2014199136A1 GB 2014051777 W GB2014051777 W GB 2014051777W WO 2014199136 A1 WO2014199136 A1 WO 2014199136A1
Authority
WO
WIPO (PCT)
Prior art keywords
rfid tag
coil
integrated circuit
connector assembly
assembly
Prior art date
Application number
PCT/GB2014/051777
Other languages
French (fr)
Inventor
Ian Miles Standish
Stephen LAMBOURN
Original Assignee
Tyco Electronics Uk Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tyco Electronics Uk Ltd. filed Critical Tyco Electronics Uk Ltd.
Publication of WO2014199136A1 publication Critical patent/WO2014199136A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/465—Identification means, e.g. labels, tags, markings
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/04—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the shape
    • G06K19/041—Constructional details
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07773—Antenna details
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07796—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements on the record carrier to allow stacking of a plurality of similar record carriers, e.g. to avoid interference between the non-contact communication of the plurality of record carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3895—Dismountable connectors, i.e. comprising plugs identification of connection, e.g. right plug to the right socket or full engagement of the mating parts
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer

Definitions

  • RFI D radio frequency identification
  • the RFID reader can be used to read the RFID tag attached to any connector inserted into any given port.
  • a hand-held RFI D reader is used to read RFID tags that are attached to objects that are tracked.
  • RFID radio frequency identification
  • the first type of hand-held RFID reader typically includes a large collection antenna that is capable of reading large RFID tags.
  • the use of this first type of hand-held RFI D reader and large RFI D tags result in the RFI D reader having a broad read range (for example, the ability to read RFID tags at distances greater than 10 mm).
  • the other type of handheld RFID reader typically includes a smaller collection antenna that is typically not capable of reading large RFID tags but instead is optimized for reading smaller RFID tags.
  • the use of this second type of hand-held RFID reader and small RFID tags result in the RFID reader having a narrow read range (for example, the ability to read RFID tags at distances less than 10 mm).
  • RFID tags can be placed on connectors that terminate communication cables, where the connectors can be inserted into ports of a network element. If large RFID tags were attached to such connectors and the first type of handheld RFID reader having a broad read range were used to read such tags, it would likely be difficult for a technician to read a single RFID tag attached to a particular connector. This would likely occur because the broad read range of the RFID reader would result in RFID tags attached to neighboring connectors being read in addition to the RFID tag attached to the targeted connector. That is, this type of RFID reader is not able to perform a "localized" read that reads only a single RFID tag associated with a particular targeted connector.
  • One embodiment is directed to a RFID tag assembly comprising a RFID tag integrated circuit and a coil connected to the RFID tag integrated circuit.
  • the coil is configured to be wrapped around an object having a curved or multi-sided surface so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
  • Another embodiment is directed to an apparatus comprising an object, a RFID tag integrated circuit mounted to the object, and a coil mounted to the object and connected to the RFID tag integrated circuit.
  • the coil is configured to be wrapped around the object so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
  • Another embodiment is directed to a connector assembly for attaching to a communication cable.
  • the connector assembly comprises a body, a connector housed within the body and configured to attach to the communication cable, a RFID tag integrated circuit, and a coil connected to the RFID tag integrated circuit.
  • the coil is configured to be wrapped around the connector assembly so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
  • Another embodiment is directed to network element comprising at least one port to which at least one communication cable can be attached, the port having an exterior surface that can be accessed from multiple directions.
  • the network element further comprises a RFID tag integrated circuit associated with each port and a coil connected to the RFID tag integrated circuit.
  • the coil is configured to be wrapped around the port so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
  • FIG. 1 illustrates one exemplary embodiment of a flexible RFID tag assembly.
  • FIG. 2 illustrates one high-level exemplary embodiment of an object to which the flexible RFID tag assembly of FIG. 1 is mounted.
  • FIG. 3 illustrates an exemplary embodiment of a connector assembly and adapter assembly.
  • FIG. 4 illustrates the connector assembly and adapter assembly shown in FIG. 3 connected to one another.
  • FIG. 5 illustrates one exemplary embodiment of a network element that can be used with the connector assembly and adapter assembly of FIGS. 3-4.
  • FIG. 1 illustrates one exemplary embodiment of a flexible RFID tag assembly 100.
  • the flexible RFID tag assembly 100 comprises an RFID tag integrated circuit (IC) 102 and a flexible localized antenna circuit 103 that includes coil 106 that is coupled to the RFID IC 102.
  • IC RFID tag integrated circuit
  • the RFID tag IC 102 can be implemented in a conventional manner.
  • the RFID tag IC 102 is configured to collect power from the radio frequency signal received by the flexible localized antenna circuit 104, demodulate the radio frequency signal received by the flexible localized antenna circuit 104, respond to any information modulated onto the radio frequency signal transmitted by the RFID reader, store information in memory included in the RFID tag IC 102, and read information stored in the memory and transmit it back to the RFID reader.
  • the RFID tag IC 102 can be implemented in other ways.
  • the flexible RFID tag assembly 100 (more specifically, the coil 106 of the flexible localized antenna circuit 104) can be wrapped around an object 300.
  • a hand-held RFID reader 302 can be used to read the RFID tag IC 102 included in the assembly 100.
  • the information read from the RFID tag IC 102 is used, for example, in connection with tracking the RFID tag assembly 100 and/or the object 300 to which it is mounted.
  • the hand-held RFID reader 302 is implemented using a conventional hand-held RFID reader that includes an antenna 304 (also referred to here as the "tip" 304).
  • the tip 304 of the RFID reader 302 is moved and positioned in connection with reading the RFID tag IC 102.
  • the RFID tag IC 102 and the hand-held RFID reader 302 are configured so that the RFID reader 302 has a narrow read range such that, if the flexible localized antenna circuit 104 described below were not used, the tip 304 of the RFID reader 302 would need to positioned very close to the RFID tag IC 102 (for example, 10 mm or less) in order to perform a localized read of that RFID tag IC 102 and no other RFID tag IC that may be near by.
  • the very small region in which the tip 304 of the RFID reader 302 would need to be located in order to perform such a localized read of the RFID tag IC 102 if the flexible localized antenna circuit 104 described below were not used is also referred to here as the "spot region" of the RFID tag IC 102.
  • the object 300 has a curved outer surface 306. More specifically, the object 300 has a generally cylindrical shape. As a result, the object 300 (more specifically, the outer surface 306 thereof) can be physically accessed from multiple directions. However, if the flexible localized antenna circuit 104 described below were not used, the hand-held RFID reader 302 would need to access the object 300 from a direction that enables the tip 304 of the RFID reader 302 to be positioned within the spot region of the RFID tag IC 102 in order to perform a localized read of that RFID tag IC 102.
  • the flexible localized antenna circuit 104 is used to enable the hand-held RFID reader 302 to physically access and read the RFID tag IC 102 from multiple directions, not just those that enable the tip 304 of the reader 302 to be positioned within the spot region of the RFID tag IC 102.
  • the flexible localized antenna circuit 104 comprises a coil 106 that is connected (or otherwise coupled to) the RFID tag IC 102.
  • the flexible localized antenna circuit 104 is wrapped around (or otherwise mounted to) the object 300 so that the coil 106 is positioned around the object 300.
  • the hand-held RFID reader 302 (more specifically, the tip 304 thereof) can physically access the coil 106 from multiple directions in order to inductively couple the RFID reader 302 to the RFID tag IC 102 in connection with the RFID reader 302 reading the RFID tag IC 102.
  • the coil 106 is formed using an open-center or loop geometry (shown in FIG. 1).
  • the particular details of the coil 106 are configured to effectively couple the RFID reader 302 to the RFID tag IC 102 to perform a localized read of the RFID tag IC 102 in the desired application.
  • the flexible localized antenna circuit 104 further comprises one or more tuning components 108 that are used to tune the flexible localized antenna circuit 104 to effectively couple the RFID reader 302 to the RFID tag IC 102 to perform a localized read of the RFID tag IC 102 in the desired application. Examples of tuning components 108 include resistors and capacitors.
  • the flexible localized antenna circuit 104 is implemented using a flexible printed circuit board (PCB) in which the coil 106 is formed in a conductive layer of the PCB and on which the tuning components 108 are mounted or formed.
  • the RFID tag IC 102 can be connected to the flexible localized antenna circuit 104 using a fold-over air bridge structure or a double sided PCB track connected by vias.
  • the flexible PCB with the attached RFID tag IC 102 is wrapped around the object 300, and an adhesive is used to connect the two opposing ends 110 of the flexible PCB to one another. Then, the circuit 104 and RFID tag IC 102 are over-moulded (that is, covered) using, for example, MACRO-MELT or similar low temperature plastic.
  • the flexible PCB in this exemplary embodiment includes one or more cutouts 112 in the PCB substrate.
  • the coil 106 is positioned around the object 300.
  • the hand-held RFID reader 302 (more specifically, the tip 304 thereof) can positioned near (or touch) the coil 106 at any point on the circumference of the object 300 in order to inductively couple the RFID reader 302 to the RFID tag IC 102 so that the RFID reader 302 can perform a localized read of the RFID tag IC 102. That is, the hand-held RFID reader 302 can access the object 300 from any direction, not just from a direction that enables the tip 304 of the RFID reader 302 to be positioned within the spot region of the RFID tag IC 102.
  • the flexible localized antenna circuit 104 and the RFID tag IC 102 are described here as being formed as separate items that are later attached to one another during assembly, it is to be understood that the flexible localized antenna circuit 104 and the RFI D tag IC 102 (or one or more components thereof) can be integrated together.
  • the flexible localized antenna circuit 104, the coils 106, and RFI D tag IC 102 can be implemented in other ways.
  • the coil 106 and the RFID tag IC 102 can be attached to the object separately and need not be mounted to a common flexible printed circuit board .
  • the flexible localized antenna circuit 104 and coil 106 described here can be used with objects having multi-sided shapes (such as square, hexagonal, and octagonal shapes), where the multi-sided shape can be accessed from multiple directions.
  • the flexible localized antenna circuit 104 and coil 106 can be wrapped around the multi-sided object so that an RFID reader 302 can physically access the coil 106 from multiple directions in order to inductively couple the RFID reader 302 to the RFID tag integrated circuit 102 in connection with the RFID reader 302 performing a localized read of the RFID tag IC 102.
  • FIGS. 3-5 One such application is illustrated in FIGS. 3-5.
  • FIGS. 3-5 illustrate exemplary embodiments of connector assemblies 400 and 402, both of which are attached to ends of respective communication cables 404 and 406.
  • the connector assembly 400 is configured to mate with a corresponding connector assembly 402 in order to communicatively couple the attached
  • the particular connectors shown in FIGS. 3-5 are DLX fiber optic connector assemblies 400 and 402, both of which are attached to ends of respective optical cables 404 and 406.
  • Such connector assemblies 400 and 402 are also referred to as "hardened” or “ruggedized” connector assemblies that are suitable for use, for example, in the outside plant of a telecommunication service provider's network.
  • other types of connectors and cables can be used.
  • the DLX fiber optic connector assemblies 400 and 402 are
  • the DLX connector assembly 400 comprises a fiber optic connector 408 that terminates one or more optical fibers included in the optical cable 404.
  • the fiber optic connector 408 comprises a DLX connector, though it is to be understood that other types of single-fiber and multi-fiber connectors can also be used.
  • the fiber optic connector 408 is configured to mate with a corresponding fiber optic adapter 410 included in the DLX adapter assembly 402 when the DLX connector assembly 400 is connected to the DLX adapter assembly 402.
  • the DLX connector assembly 400 also comprises a body 414 that is configured to house the fiber optic connector 408.
  • the body 414 comprises a coupling nut and is also referred to here as "nut" 414.
  • the nut 414 has threads 416 formed on its exterior so that it can be screwed into the DLX adapter assembly 402.
  • the DLX adapter assembly 402 comprises a fiber optic adapter 410 that terminates one or more optical fibers included in the optical cable 406 attached to the adapter assembly 402.
  • the fiber optic adapter 410 is compatible, and designed to mate, with the fiber optic connector 408 of the connector assembly 400.
  • the DLX adapter assembly 402 also comprises a body 420 that is configured to house the fiber optic adapter 410.
  • the body 420 comprises a socket and is also referred to here as "socket" 420.
  • the socket 420 has a generally cylindrical shape.
  • the fiber optic adapter 410 is inserted into one end of the socket 420, which is configured to hold the fiber optic adapter 410 in place.
  • the fiber optic connector 408 of the connector assembly 400 is inserted into the other end of the socket 420 and mates with the fiber optic adapter 410 when the connector assembly 400 is attached to the adapter assembly 402.
  • the socket 420 includes threads 418 on its interior surface.
  • the nut 414 of the connector assembly 400 is screwed into the socket 420 of the adapter assembly 402 so that the threads 416 formed on the exterior surface of the nut 414 engage the threads 418 formed on the interior surface of the socket 420 and hold the connector assembly 400 in place.
  • the socket 420 also includes threads (not shown) on its exterior surface.
  • a nut 422 that is screwed around the exterior threads of the socket 420 covers the threads on the exterior portion of the socket 420.
  • One or more DLX adapter assemblies 402 can be mounted in a network element 424 (shown in FIG. 5) using the exterior threads of the socket 420.
  • the network element 424 comprises a multiport service terminal (MST), although it is to be understood that other types of network elements can be used (such as an optical terminal enclosure (OTE)).
  • MST multiport service terminal
  • OTE optical terminal enclosure
  • the network element 424 comprises one or more ports 426 and a housing (or other body) 428 in which a threaded opening is formed for each port 426.
  • a respective DLX adapter assembly 402 can be screwed into each threaded opening (using the exterior threads formed on the exterior surface of the socket 420) to secure the adapter assembly 402 in the network element 424.
  • a DLX connector assembly 400 (with an optical cable 404 attached to it) can be screwed into each DLX adapter assembly 402, where the exterior threads 416 formed on the associated nut 414 engage the interior threads formed in the associated socket 420.
  • a protective cap 432 can be tethered to each DLX adapter assembly 402 so that it can be screwed into the adapter assembly 402 when it is not in use.
  • the DLX connector assembly 400 and DLX adapter assembly 402 are implemented in a conventional manner and can include other conventional features (for example, O-rings), which are not described here for the sake of brevity.
  • a respective flexible RFID tag assembly 434 and 436 of the type described above in connection with FIGS. 1-2 can be used to attach a respective RFID tag IC 438 and 440 to the DLX connector assembly 400 and the DLX adapter assembly 402.
  • the flexible RFID tag assembly 434 and 436 and RFID tags IC 438 and 440 are implemented as described above in connection with FIGS. 1-2.
  • each flexible RFID tag assembly 434 and 436 can include a respective flexible localized antenna circuit implemented using a respective flexible PCB and a respective coil having an open-center or loop geometry.
  • the flexible RFID tag assembly 434 (with the RFID tag IC 438 attached to it) is wrapped around the nut 414 of the DLX connector assembly 400.
  • a recess 442 is formed in and around the nut 414.
  • the flexible RFID tag assembly 434 (with the RFID tag IC 438 attached to it) is positioned in the recess 442 and wrapped around the nut 414.
  • an adhesive can be used to connect the two opposing ends of the flexible PCB to one another. Then, the flexible RFID tag assembly 434 and RFID tag IC 438 can be over- moulded using, for example, MACRO-MELT or similar low temperature plastic.
  • a hand-held RFID reader By wrapping the flexible RFID tag assembly 434 around the nut 414 of the DLX connector assembly 400, a hand-held RFID reader can be positioned near the coil included in the flexible RFID tag assembly 434 anywhere along the circumference of the nut 414 in order to inductively couple the RFID reader to the RFID tag IC 438 so that the RFID reader can perform a localized read of the RFID tag IC 438. That is, a hand-held RFID reader can physically access the coil from multiple directions (not just from a direction that enables the tip of the RFID reader to be positioned within the spot region of the RFID tag IC 438).
  • the flexible RFID tag assembly 436 (with the RFID tag IC 440 attached to it) is wrapped around the socket 420 of the DLX adapter assembly 402.
  • a recess 448 is formed in and around a collar portion 450 of the socket 420.
  • the flexible RFID tag assembly 436 (with the RFID tag IC 440 attached to it) is positioned in the recess 448 and wrapped around the socket 420.
  • an adhesive is used to connect the two opposing ends of the flexible PCB to one another. Then, the flexible RFID tag assembly 436 and RFID tag IC 440 are over-moulded using, for example, MACRO-MELT or similar low temperature plastic.
  • a handheld RFID reader By wrapping the flexible RFID tag assembly 436 around the socket 420, a handheld RFID reader can be positioned near the coil included in the flexible RFID tag assembly 436 anywhere along the circumference of the socket 420 in order to inductively couple the RFID reader to the RFID tag IC 440 so that the RFID reader can perform a localized read of the RFID tag IC 440. That is, a hand-held RFID reader can physically access the coil from multiple directions (not just from a direction that enables the tip of the RFID reader to be positioned within the spot region of the RFID tag IC 440).
  • the flexible RFID tag assembly 434 can be mounted to the nut 414 of the connector assembly 400 and the flexible RFID tag assembly 436 can be mounted to the socket 420 of the adapter assembly 402 so that the flexible RFID tag assembly 434 and 436 do not overlap one another when the nut 414 is inserted into the socket 420.
  • a technician will need to perform two read transactions in order to read the RFID tag ICs 438 and 440 attached to the flexible RFID tag assemblies 434 and 436, respectively.
  • the technician can position the tip of the RFID reader near or on the coil included in the flexible RFID tag assembly 434 of the connector assembly 400 and then cause the RFID reader to interrogate and read the RFID tag IC 438.
  • the technician would need to move the tip of the RFID reader from near or on the coil included in the flexible RFID tag assembly 434 of the connector assembly 400 and position it near or on the coil included in the flexible RFID tag assembly 436 of the adapter assembly 402 and then cause the RFID reader to interrogate and read the RFID tag IC 440.
  • the flexible RFID tag assembly 434 can be mounted to the nut 414 of the connector assembly 400 and the flexible RFID tag assembly 436 can be mounted to the socket 420 of the adapter assembly 402 so that the flexible RFID tag assemblies 434 and 436 overlap one another when the connector assembly 400 is inserted into the adapter assembly 402 and so that a technician can read both the RFID tag IC 438 attached to the connector assembly 400 and the RFID tag IC 440 attached to the adapter assembly 402 from a single location along the coil included the flexible RFID tag assembly 436 of the adapter assembly 402. This can be done in what appears to be, from the perspective of the technician, to be a single read transaction (for example, using the standard RFID anti-collision protocols that standard RFID tags implement to address situations where multiple RFID tags attempt to transmit at the same time).
  • the connector assemblies 400 and attached cables 404 can make it difficult for a technician to insert the tip of a RFID reader through the cables 404 and connector assemblies 400 and position it within the spot region of the RFID tag IC 438.
  • a technician can use a hand-held reader to perform a localized read of the RFID tags IC 438 and 440 attached to DLX connector assemblies 400 and DLX adapter assemblies 402 by positioning the tip of the RFID reader near any point on the coils included in the corresponding flexible RFID tag assembly 434 or 436. That is, the technician is not required to identify where a RFID tag IC is located and then precisely position the tip of the RFID reader in the spot region of the RFID tag IC in order to perform a localized read of the RFID tag IC. This is especially helpful in situations where the technician only has a single free hand to perform such RFID tag reading (for example, where the technician must climb a ladder to perform such reading) or where it is not convenient for the technician to visually identify where the RFID tag is located.
  • each flexible RFID tag assembly is typically covered by a protective material (for example, MACRO-MELT or similar low temperature plastic).
  • This covering material can incorporate one or more visual attributes (such as colors, letters or numbers, images, patterns, or textures) so that the location of the flexible RFID tag assembly can be easily seen.
  • the covering material can have a color that contrasts with the color of the rest of the object.
  • such contrasting coloring can provide an easily seen indication that the particular object has an associated RFID tag. This may be useful where objects that include flexible RFID tag assemblies and RFID tag ICs are used with objects that might not include any RFID tags at all. In this situation, a visual attribute that distinguishes those objects that have RFID tags from those objects that do not provides a mechanism for a technician to easily identify those objects than can be read using the techniques described here.
  • a transparent covering material can be used so that the underlying flexible RFID tag assembly can be seen.
  • the covering material can have a color that matches the color of the associated object so as to not draw visual attention to the flexible RFID tag assembly.
  • Example 1 includes a RFID tag assembly comprising: a RFID tag integrated circuit; and a coil connected to the RFID tag integrated circuit; wherein the coil is configured to be wrapped around an object having a curved or multi-sided surface so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
  • Example 2 includes the RFID tag assembly of Example 1, wherein the coil is wrapped around the object so that an RFID reader that is positioned near any point on the coil is coupled to the RFID tag integrated circuit for performing a localized read of the RFID tag integrated circuit.
  • Example 3 includes the RFID tag assembly of any of the Examples 1-2, further comprising a flexible antenna circuit that includes the coil.
  • Example 4 includes the RFID tag assembly of Example 3, wherein the flexible antenna circuit comprises a flexible printed circuit board.
  • Example 5 includes the RFID tag assembly of any of the Examples 3-4, wherein the flexible antenna circuit is connected to the RFID tag integrated circuit using an air bridge structure or double sided PCB track connected by vias.
  • Example 6 includes the RFID tag assembly of any of the Examples 3-5, wherein the flexible antenna circuit further comprises tuning components.
  • Example 7 includes the RFID tag assembly of any of the Examples 1-6, wherein the coil comprises an open center loop.
  • Example 8 includes an apparatus comprising: an object; a RFID tag integrated circuit mounted to the object; and a coil mounted to the object and connected to the RFID tag integrated circuit; wherein the coil is configured to be wrapped around the object so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
  • Example 9 includes the apparatus of Example 8, wherein the object comprises a connector attached to a cable.
  • Example 10 includes the apparatus of Example 9, wherein the connector comprises one of a fiber optic connector assembly, a fiber optic adapter assembly, and a copper connector assembly.
  • Example 11 includes the apparatus of any of the Examples 9-10, wherein the connector comprises one of a hardened fiber optic connector assembly and a hardened fiber optic adapter assembly.
  • Example 12 includes the apparatus of any of the Examples 9-11, wherein the connector has a generally cylindrical shape, wherein the coil is disposed around the connector.
  • Example 13 includes a connector assembly for attaching to a communication cable, the connector assembly comprising: a body; a connector housed within the body and configured to attach to the communication cable; a RFID tag integrated circuit; and a coil connected to the RFID tag integrated circuit; wherein the coil is configured to be wrapped around the connector assembly so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
  • Example 14 includes the connector assembly of Example 13, wherein the connector assembly comprises one of an optical connector assembly comprising a fiber optic connector; an optical adapter assembly comprising a fiber optic adapter; and a copper connector assembly comprising a copper connector.
  • Example 15 includes the connector assembly of any of the Examples 13-14, wherein the connector assembly comprises a hardened connector assembly; wherein the connector comprises a fiber optic connector; and wherein the body comprises a nut configured to be screwed into a socket of a hardened adapter assembly.
  • Example 16 includes the connector assembly of any of the Examples 13-15, wherein the connector assembly comprises a hardened adapter assembly; wherein the connector comprises a fiber optic adapter; and wherein the body comprises a socket configured so that a hardened connector assembly can be screwed into the socket.
  • Example 17 includes the connector assembly of any of the Examples 13-16, wherein the body comprises a recess formed therein, wherein the coil is disposed in the recess and wrapped around the body.
  • Example 18 includes the connector assembly of Example 17, wherein the coil and the RFID tag integrated circuit are included in a flexible RFID tag assembly that is over- moulded.
  • Example 19 includes the connector assembly of any of the Examples 13-18, wherein the coil is wrapped around the connector assembly so that an RFID reader that is positioned near any point on the coil is coupled to the RFID tag for performing a localized read of the RFID tag integrated circuit.
  • Example 20 includes the connector assembly of any of the Examples 13-19, wherein the connector assembly is configured to be attached to a second connector assembly, the second connector assembly comprising: a second RFID tag integrated circuit; and a second coil connected to the second RFID tag integrated circuit; wherein the second coil is configured to be wrapped around the second connector assembly so that an RFID reader can physically access the second coil from multiple directions in order to inductively couple the RFID reader to the second RFID tag integrated circuit in connection with the RFID reader performing a localized read of the second RFID tag integrated circuit.
  • Example 21 includes the connector assembly of Example 20, wherein the connector assembly is configured so that the RFID tag integrated circuit and the coil are disposed on the connector assembly so as to not overlap the second RFID tag integrated circuit and the second coil disposed on the second connector assembly when the connector assembly is attached to the second connector assembly.
  • Example 22 includes the connector assembly of any of the Examples 20-21, wherein the connector assembly is configured so that the RFID tag integrated circuit and the coil are disposed on the connector assembly so as to overlap the second RFID tag integrated circuit and the second coil disposed on the second connector assembly when the connector assembly is attached to the second connector assembly so that the RFID tag integrated circuit attached to the connector assembly and the second RFID tag integrated circuit attached to the second connector assembly can be read in a single read transaction.
  • Example 23 includes a network element comprising: at least one port to which at least one communication cable can be attached, the port having an exterior surface that can be accessed from multiple directions; and a RFID tag integrated circuit associated with each port; a coil connected to the RFID tag integrated circuit; wherein the coil is configured to be wrapped around the port so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
  • Example 24 includes the network element of Example 23, wherein the network element comprises: a plurality of ports, each port having associated therewith: a respective RFID tag integrated circuit; and a respective coil connected to the RFID tag integrated circuit; wherein each coil is configured to be wrapped around the associated port so that an RFID reader can physically access the respective coil from multiple directions in order to inductively couple the RFID reader to the associated RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
  • Example 25 includes the network element of any of the Examples 23-24, wherein the network element comprises one of a multiport service terminal (MST) and an optical terminal enclosure (OTE).
  • MST multiport service terminal
  • OFTE optical terminal enclosure
  • Example 26 includes the network element of any of the Examples 23-25, wherein each port comprises a respective first connector assembly to which a respective second connector assembly can be attached.
  • Example 27 includes the network element of Example 26, wherein each port comprises a respective threaded opening formed in a housing and a respective hardened adapter assembly screwed into the threaded opening; wherein the flexible RFID tag assembly for the port is wrapped around the respective hardened adapter assembly; and wherein each hardened adapter assembly is configured to be attached to a respective hardened connector assembly.
  • Example 28 includes the network element of any of the Examples 23-27, wherein the coil is included in a flexible antenna circuit that comprises a flexible printed circuit board that is disposed around the port.

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Abstract

An RFID tag assembly (100) comprises an RFID tag integrated circuit (102) and a coil (106) connected to the circuit (102). The coil (106) is configured to be wrapped around an object (300) having a curved or multi-sided surface so that an RFID reader (302) can physically access the coil (106) from multiple directions in order to inductively couple the RFID reader (302) to the RFID tag integrated circuit (102) in connection with the RFID reader (302) performing a localized read of the RFID tag integrated circuit (102). Examples of such objects include a connector assembly for attaching to a communication cable and a network element.

Description

FLEXIBLE RFID TAG ASSEMBLY
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of US Provisional Patent Application Serial No. 61/833,987, filed June 12, 2013, which is hereby incorporated herein by reference.
BACKGROUND
[0002] One application of radio frequency identification (RFI D) technology involves placing RFI D tags on connectors that terminate communication cables and that can be inserted into ports of a patch panel. In such an application, each port has a
corresponding RFI D antenna integrated into the patch panel that is coupled to an RFID reader (which is also integrated into the patch panel). The RFID reader can be used to read the RFID tag attached to any connector inserted into any given port.
[0003] Such an application is typically deployed inside of a central office of a
telecommunication service provider or a data room or closet of an enterprise where power is generally available on a continuous basis. However, such an application of RFID technology is not typically suitable for use in the outside plant of a
telecommunication service provider's network (for example, because power is not readily available on a continuous basis).
[0004] In other common applications of RFID technology, a hand-held RFI D reader is used to read RFID tags that are attached to objects that are tracked. Two distinct designs of hand-held radio frequency identification (RFID) readers are commonly used. The first type of hand-held RFID reader typically includes a large collection antenna that is capable of reading large RFID tags. The use of this first type of hand-held RFI D reader and large RFI D tags result in the RFI D reader having a broad read range (for example, the ability to read RFID tags at distances greater than 10 mm). The other type of handheld RFID reader typically includes a smaller collection antenna that is typically not capable of reading large RFID tags but instead is optimized for reading smaller RFID tags. The use of this second type of hand-held RFID reader and small RFID tags result in the RFID reader having a narrow read range (for example, the ability to read RFID tags at distances less than 10 mm).
[0005] In some applications, there are many objects to be tracked within a small area. For example, as noted above, RFID tags can be placed on connectors that terminate communication cables, where the connectors can be inserted into ports of a network element. If large RFID tags were attached to such connectors and the first type of handheld RFID reader having a broad read range were used to read such tags, it would likely be difficult for a technician to read a single RFID tag attached to a particular connector. This would likely occur because the broad read range of the RFID reader would result in RFID tags attached to neighboring connectors being read in addition to the RFID tag attached to the targeted connector. That is, this type of RFID reader is not able to perform a "localized" read that reads only a single RFID tag associated with a particular targeted connector.
[0006] If small RFID tags were attached to such connectors and the second type of hand-held RFID reader having a narrow read range were used to read such tags, a technician would typically be able to perform such a localized read where a single RFID tag attached to a particular targeted connector could be read without inadvertently reading the RFID tags attached to neighboring connectors. This could be done by designing the RFID reader and the RFID tags with sufficiently narrow read ranges. As a result, to perform such a localized read of a single RFID tag attached to a particular targeted connector, the technician would typically need to position the tip of the RFID reader very close to the RFID tag (for example, within 10 mm or less of the RFID tag). Doing this typically requires the technician to locate where the RFID tag is located on the connector.
[0007] However, with some types of connectors, it can be difficult for a technician to locate exactly where the RFID tag is located on the connector. For example, some connectors can be inserted into a corresponding port in a way that any RFID tag attached to the connector will not be located in a predetermined position or orientation. One example of such a type of connector is a DLX fiber optic connector. Typically, the RFID tag attached to such connectors will not otherwise be visible to the technician. Also, when many DLX connectors are inserted into multiple ports of a single network element, the connectors and attached cables can make it difficult for a technician to insert the tip of a RFID reader through the cables and connectors and position it sufficiently close to the RFID tag to read the RFID tag. As a result, it can be difficult to perform a localized read of RFID tags when used with such connectors and network elements.
SUMMARY
[0008] One embodiment is directed to a RFID tag assembly comprising a RFID tag integrated circuit and a coil connected to the RFID tag integrated circuit. The coil is configured to be wrapped around an object having a curved or multi-sided surface so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
[0009] Another embodiment is directed to an apparatus comprising an object, a RFID tag integrated circuit mounted to the object, and a coil mounted to the object and connected to the RFID tag integrated circuit. The coil is configured to be wrapped around the object so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
[0010] Another embodiment is directed to a connector assembly for attaching to a communication cable. The connector assembly comprises a body, a connector housed within the body and configured to attach to the communication cable, a RFID tag integrated circuit, and a coil connected to the RFID tag integrated circuit. The coil is configured to be wrapped around the connector assembly so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
[0011] Another embodiment is directed to network element comprising at least one port to which at least one communication cable can be attached, the port having an exterior surface that can be accessed from multiple directions. The network element further comprises a RFID tag integrated circuit associated with each port and a coil connected to the RFID tag integrated circuit. The coil is configured to be wrapped around the port so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
DRAWINGS
[0012] FIG. 1 illustrates one exemplary embodiment of a flexible RFID tag assembly.
[0013] FIG. 2 illustrates one high-level exemplary embodiment of an object to which the flexible RFID tag assembly of FIG. 1 is mounted.
[0014] FIG. 3 illustrates an exemplary embodiment of a connector assembly and adapter assembly.
[0015] FIG. 4 illustrates the connector assembly and adapter assembly shown in FIG. 3 connected to one another.
[0016] FIG. 5 illustrates one exemplary embodiment of a network element that can be used with the connector assembly and adapter assembly of FIGS. 3-4. DETAILED DESCRIPTION
[0017] FIG. 1 illustrates one exemplary embodiment of a flexible RFID tag assembly 100. In the exemplary embodiment shown in FIG. 1, the flexible RFID tag assembly 100 comprises an RFID tag integrated circuit (IC) 102 and a flexible localized antenna circuit 103 that includes coil 106 that is coupled to the RFID IC 102.
[0018] The RFID tag IC 102 can be implemented in a conventional manner. In the exemplary embodiment described here in connection with FIG. 1, the RFID tag IC 102 is configured to collect power from the radio frequency signal received by the flexible localized antenna circuit 104, demodulate the radio frequency signal received by the flexible localized antenna circuit 104, respond to any information modulated onto the radio frequency signal transmitted by the RFID reader, store information in memory included in the RFID tag IC 102, and read information stored in the memory and transmit it back to the RFID reader. However, it is to be understood that the RFID tag IC 102 can be implemented in other ways.
[0019] As shown in FIG. 2, the flexible RFID tag assembly 100 (more specifically, the coil 106 of the flexible localized antenna circuit 104) can be wrapped around an object 300. A hand-held RFID reader 302 can be used to read the RFID tag IC 102 included in the assembly 100. The information read from the RFID tag IC 102 is used, for example, in connection with tracking the RFID tag assembly 100 and/or the object 300 to which it is mounted.
[0020] In this exemplary embodiment, the hand-held RFID reader 302 is implemented using a conventional hand-held RFID reader that includes an antenna 304 (also referred to here as the "tip" 304). The tip 304 of the RFID reader 302 is moved and positioned in connection with reading the RFID tag IC 102. In this exemplary embodiment, the RFID tag IC 102 and the hand-held RFID reader 302 are configured so that the RFID reader 302 has a narrow read range such that, if the flexible localized antenna circuit 104 described below were not used, the tip 304 of the RFID reader 302 would need to positioned very close to the RFID tag IC 102 (for example, 10 mm or less) in order to perform a localized read of that RFID tag IC 102 and no other RFID tag IC that may be near by. The very small region in which the tip 304 of the RFID reader 302 would need to be located in order to perform such a localized read of the RFID tag IC 102 if the flexible localized antenna circuit 104 described below were not used is also referred to here as the "spot region" of the RFID tag IC 102.
[0021] In the embodiment shown in FIG. 2, the object 300 has a curved outer surface 306. More specifically, the object 300 has a generally cylindrical shape. As a result, the object 300 (more specifically, the outer surface 306 thereof) can be physically accessed from multiple directions. However, if the flexible localized antenna circuit 104 described below were not used, the hand-held RFID reader 302 would need to access the object 300 from a direction that enables the tip 304 of the RFID reader 302 to be positioned within the spot region of the RFID tag IC 102 in order to perform a localized read of that RFID tag IC 102.
[0022] In this exemplary embodiment, the flexible localized antenna circuit 104 is used to enable the hand-held RFID reader 302 to physically access and read the RFID tag IC 102 from multiple directions, not just those that enable the tip 304 of the reader 302 to be positioned within the spot region of the RFID tag IC 102.
[0023] The flexible localized antenna circuit 104 comprises a coil 106 that is connected (or otherwise coupled to) the RFID tag IC 102. The flexible localized antenna circuit 104 is wrapped around (or otherwise mounted to) the object 300 so that the coil 106 is positioned around the object 300. As a result, the hand-held RFID reader 302 (more specifically, the tip 304 thereof) can physically access the coil 106 from multiple directions in order to inductively couple the RFID reader 302 to the RFID tag IC 102 in connection with the RFID reader 302 reading the RFID tag IC 102.
[0024] In this exemplary embodiment, the coil 106 is formed using an open-center or loop geometry (shown in FIG. 1). The particular details of the coil 106 (for example, the number of turns and width of the traces) are configured to effectively couple the RFID reader 302 to the RFID tag IC 102 to perform a localized read of the RFID tag IC 102 in the desired application. Also, in this exemplary embodiment, the flexible localized antenna circuit 104 further comprises one or more tuning components 108 that are used to tune the flexible localized antenna circuit 104 to effectively couple the RFID reader 302 to the RFID tag IC 102 to perform a localized read of the RFID tag IC 102 in the desired application. Examples of tuning components 108 include resistors and capacitors.
[0025] In this exemplary embodiment, the flexible localized antenna circuit 104 is implemented using a flexible printed circuit board (PCB) in which the coil 106 is formed in a conductive layer of the PCB and on which the tuning components 108 are mounted or formed. The RFID tag IC 102 can be connected to the flexible localized antenna circuit 104 using a fold-over air bridge structure or a double sided PCB track connected by vias. In this embodiment, the flexible PCB with the attached RFID tag IC 102 is wrapped around the object 300, and an adhesive is used to connect the two opposing ends 110 of the flexible PCB to one another. Then, the circuit 104 and RFID tag IC 102 are over-moulded (that is, covered) using, for example, MACRO-MELT or similar low temperature plastic.
[0026] To facilitate the wrapping of the flexible localized antenna circuit 104 around the object 300, the flexible PCB in this exemplary embodiment includes one or more cutouts 112 in the PCB substrate.
[0027] By wrapping the flexible localized antenna circuit 104 around the object 300, the coil 106 is positioned around the object 300. As a result, the hand-held RFID reader 302 (more specifically, the tip 304 thereof) can positioned near (or touch) the coil 106 at any point on the circumference of the object 300 in order to inductively couple the RFID reader 302 to the RFID tag IC 102 so that the RFID reader 302 can perform a localized read of the RFID tag IC 102. That is, the hand-held RFID reader 302 can access the object 300 from any direction, not just from a direction that enables the tip 304 of the RFID reader 302 to be positioned within the spot region of the RFID tag IC 102. [0028] Although the flexible localized antenna circuit 104 and the RFID tag IC 102 are described here as being formed as separate items that are later attached to one another during assembly, it is to be understood that the flexible localized antenna circuit 104 and the RFI D tag IC 102 (or one or more components thereof) can be integrated together. The flexible localized antenna circuit 104, the coils 106, and RFI D tag IC 102 can be implemented in other ways. For example, the coil 106 and the RFID tag IC 102 can be attached to the object separately and need not be mounted to a common flexible printed circuit board .
[0029] Although in the object 300 shown in FIG. 2 has a curved outer surface (more specifically, a generally cylindrical shape), it is to be understood that the flexible localized antenna circuit 104 and coil 106 described here can be used with objects having multi-sided shapes (such as square, hexagonal, and octagonal shapes), where the multi-sided shape can be accessed from multiple directions. The flexible localized antenna circuit 104 and coil 106 can be wrapped around the multi-sided object so that an RFID reader 302 can physically access the coil 106 from multiple directions in order to inductively couple the RFID reader 302 to the RFID tag integrated circuit 102 in connection with the RFID reader 302 performing a localized read of the RFID tag IC 102.
[0030] The techniques described above in connection with FIGS. 1-2 can be used in various applications. One such application is illustrated in FIGS. 3-5.
[0031] FIGS. 3-5 illustrate exemplary embodiments of connector assemblies 400 and 402, both of which are attached to ends of respective communication cables 404 and 406. Generally, the connector assembly 400 is configured to mate with a corresponding connector assembly 402 in order to communicatively couple the attached
communication cables 404 and 406 to one another.
[0032] The particular connectors shown in FIGS. 3-5 are DLX fiber optic connector assemblies 400 and 402, both of which are attached to ends of respective optical cables 404 and 406. Such connector assemblies 400 and 402 are also referred to as "hardened" or "ruggedized" connector assemblies that are suitable for use, for example, in the outside plant of a telecommunication service provider's network. However, it is to be understood that other types of connectors and cables can be used. As described in more detail below, the DLX fiber optic connector assemblies 400 and 402 are
implemented using standard fiber optic "connectors" and "adapters", where one includes a fiber optic "connector" 408 and is referred to below as a DLX "connector" assembly 400 and where the other one includes a fiber optic "adapter" 410 and is referred to below as a DLX "adapter" assembly 402.
[0033] The DLX connector assembly 400 comprises a fiber optic connector 408 that terminates one or more optical fibers included in the optical cable 404. In the example shown in FIGS. 3-5, the fiber optic connector 408 comprises a DLX connector, though it is to be understood that other types of single-fiber and multi-fiber connectors can also be used. The fiber optic connector 408 is configured to mate with a corresponding fiber optic adapter 410 included in the DLX adapter assembly 402 when the DLX connector assembly 400 is connected to the DLX adapter assembly 402.
[0034] The DLX connector assembly 400 also comprises a body 414 that is configured to house the fiber optic connector 408. In the exemplary embodiment shown in FIGS. 3-5, the body 414 comprises a coupling nut and is also referred to here as "nut" 414. The nut 414 has threads 416 formed on its exterior so that it can be screwed into the DLX adapter assembly 402.
[0035] The DLX adapter assembly 402 comprises a fiber optic adapter 410 that terminates one or more optical fibers included in the optical cable 406 attached to the adapter assembly 402. The fiber optic adapter 410 is compatible, and designed to mate, with the fiber optic connector 408 of the connector assembly 400.
[0036] The DLX adapter assembly 402 also comprises a body 420 that is configured to house the fiber optic adapter 410. In the exemplary embodiment shown in FIGS. 3-5, the body 420 comprises a socket and is also referred to here as "socket" 420. The socket 420 has a generally cylindrical shape. The fiber optic adapter 410 is inserted into one end of the socket 420, which is configured to hold the fiber optic adapter 410 in place. The fiber optic connector 408 of the connector assembly 400 is inserted into the other end of the socket 420 and mates with the fiber optic adapter 410 when the connector assembly 400 is attached to the adapter assembly 402.
[0037] The socket 420 includes threads 418 on its interior surface. When the connector assembly 400 is attached to the adapter assembly 402, the nut 414 of the connector assembly 400 is screwed into the socket 420 of the adapter assembly 402 so that the threads 416 formed on the exterior surface of the nut 414 engage the threads 418 formed on the interior surface of the socket 420 and hold the connector assembly 400 in place.
[0038] The socket 420 also includes threads (not shown) on its exterior surface. In FIGS. 3-4, a nut 422 that is screwed around the exterior threads of the socket 420 covers the threads on the exterior portion of the socket 420.
[0039] One or more DLX adapter assemblies 402 can be mounted in a network element 424 (shown in FIG. 5) using the exterior threads of the socket 420. In the example shown in FIG. 5, the network element 424 comprises a multiport service terminal (MST), although it is to be understood that other types of network elements can be used (such as an optical terminal enclosure (OTE)).
[0040] The network element 424 comprises one or more ports 426 and a housing (or other body) 428 in which a threaded opening is formed for each port 426. A respective DLX adapter assembly 402 can be screwed into each threaded opening (using the exterior threads formed on the exterior surface of the socket 420) to secure the adapter assembly 402 in the network element 424. Then, a DLX connector assembly 400 (with an optical cable 404 attached to it) can be screwed into each DLX adapter assembly 402, where the exterior threads 416 formed on the associated nut 414 engage the interior threads formed in the associated socket 420. Doing this causes the fiber optic connector 408 of the connector assembly 400 (and the one or more optical fibers in the attached optical cable 404) to be optically coupled to the fiber optic adapter 410 of the adapter assembly 402 (and the one or more optical fibers in the attached optical cable 406).
[0041] As shown in FIG. 5, a protective cap 432 can be tethered to each DLX adapter assembly 402 so that it can be screwed into the adapter assembly 402 when it is not in use.
[0042] Except as described below, the DLX connector assembly 400 and DLX adapter assembly 402 are implemented in a conventional manner and can include other conventional features (for example, O-rings), which are not described here for the sake of brevity.
[0043] A respective flexible RFID tag assembly 434 and 436 of the type described above in connection with FIGS. 1-2 can be used to attach a respective RFID tag IC 438 and 440 to the DLX connector assembly 400 and the DLX adapter assembly 402. In general, the flexible RFID tag assembly 434 and 436 and RFID tags IC 438 and 440 are implemented as described above in connection with FIGS. 1-2. For example, each flexible RFID tag assembly 434 and 436 can include a respective flexible localized antenna circuit implemented using a respective flexible PCB and a respective coil having an open-center or loop geometry.
[0044] The flexible RFID tag assembly 434 (with the RFID tag IC 438 attached to it) is wrapped around the nut 414 of the DLX connector assembly 400. In this exemplary embodiment, a recess 442 is formed in and around the nut 414. The flexible RFID tag assembly 434 (with the RFID tag IC 438 attached to it) is positioned in the recess 442 and wrapped around the nut 414. As is described above in connection with FIGS. 1-2, an adhesive can be used to connect the two opposing ends of the flexible PCB to one another. Then, the flexible RFID tag assembly 434 and RFID tag IC 438 can be over- moulded using, for example, MACRO-MELT or similar low temperature plastic. [0045] By wrapping the flexible RFID tag assembly 434 around the nut 414 of the DLX connector assembly 400, a hand-held RFID reader can be positioned near the coil included in the flexible RFID tag assembly 434 anywhere along the circumference of the nut 414 in order to inductively couple the RFID reader to the RFID tag IC 438 so that the RFID reader can perform a localized read of the RFID tag IC 438. That is, a hand-held RFID reader can physically access the coil from multiple directions (not just from a direction that enables the tip of the RFID reader to be positioned within the spot region of the RFID tag IC 438).
[0046] The flexible RFID tag assembly 436 (with the RFID tag IC 440 attached to it) is wrapped around the socket 420 of the DLX adapter assembly 402. In this exemplary embodiment, a recess 448 is formed in and around a collar portion 450 of the socket 420. The flexible RFID tag assembly 436 (with the RFID tag IC 440 attached to it) is positioned in the recess 448 and wrapped around the socket 420. As is described above in connection with FIGS. 1-2, an adhesive is used to connect the two opposing ends of the flexible PCB to one another. Then, the flexible RFID tag assembly 436 and RFID tag IC 440 are over-moulded using, for example, MACRO-MELT or similar low temperature plastic.
[0047] By wrapping the flexible RFID tag assembly 436 around the socket 420, a handheld RFID reader can be positioned near the coil included in the flexible RFID tag assembly 436 anywhere along the circumference of the socket 420 in order to inductively couple the RFID reader to the RFID tag IC 440 so that the RFID reader can perform a localized read of the RFID tag IC 440. That is, a hand-held RFID reader can physically access the coil from multiple directions (not just from a direction that enables the tip of the RFID reader to be positioned within the spot region of the RFID tag IC 440).
[0048] The flexible RFID tag assembly 434 can be mounted to the nut 414 of the connector assembly 400 and the flexible RFID tag assembly 436 can be mounted to the socket 420 of the adapter assembly 402 so that the flexible RFID tag assembly 434 and 436 do not overlap one another when the nut 414 is inserted into the socket 420. As a result, a technician will need to perform two read transactions in order to read the RFID tag ICs 438 and 440 attached to the flexible RFID tag assemblies 434 and 436, respectively. For example, to read the RFID tag IC 438 attached to the nut 414 of the connector assembly 400, the technician can position the tip of the RFID reader near or on the coil included in the flexible RFID tag assembly 434 of the connector assembly 400 and then cause the RFID reader to interrogate and read the RFID tag IC 438. Once this read transaction is completed, if the technician wishes to read the RFID tag IC 440 attached to the socket 420 of the adapter assembly 402, the technician would need to move the tip of the RFID reader from near or on the coil included in the flexible RFID tag assembly 434 of the connector assembly 400 and position it near or on the coil included in the flexible RFID tag assembly 436 of the adapter assembly 402 and then cause the RFID reader to interrogate and read the RFID tag IC 440.
[0049] However, it is to be understood that in other embodiments, the flexible RFID tag assembly 434 can be mounted to the nut 414 of the connector assembly 400 and the flexible RFID tag assembly 436 can be mounted to the socket 420 of the adapter assembly 402 so that the flexible RFID tag assemblies 434 and 436 overlap one another when the connector assembly 400 is inserted into the adapter assembly 402 and so that a technician can read both the RFID tag IC 438 attached to the connector assembly 400 and the RFID tag IC 440 attached to the adapter assembly 402 from a single location along the coil included the flexible RFID tag assembly 436 of the adapter assembly 402. This can be done in what appears to be, from the perspective of the technician, to be a single read transaction (for example, using the standard RFID anti-collision protocols that standard RFID tags implement to address situations where multiple RFID tags attempt to transmit at the same time).
[0050] As noted above, when many DLX connector assemblies 400 are inserted into multiple DLX adapter assemblies 402 that are housed in a single network element 424, the connector assemblies 400 and attached cables 404 can make it difficult for a technician to insert the tip of a RFID reader through the cables 404 and connector assemblies 400 and position it within the spot region of the RFID tag IC 438. As a result of using the flexible RFID tag assembly 434 and 436 with the DLX connector assemblies 400 and DLX adapter assemblies 402, a technician can use a hand-held reader to perform a localized read of the RFID tags IC 438 and 440 attached to DLX connector assemblies 400 and DLX adapter assemblies 402 by positioning the tip of the RFID reader near any point on the coils included in the corresponding flexible RFID tag assembly 434 or 436. That is, the technician is not required to identify where a RFID tag IC is located and then precisely position the tip of the RFID reader in the spot region of the RFID tag IC in order to perform a localized read of the RFID tag IC. This is especially helpful in situations where the technician only has a single free hand to perform such RFID tag reading (for example, where the technician must climb a ladder to perform such reading) or where it is not convenient for the technician to visually identify where the RFID tag is located.
[0051] In FIGS. 3-5, for ease of explanation, the flexible RFID tag assemblies 434 and 436 are visible. However, as described above, each flexible RFID tag assembly is typically covered by a protective material (for example, MACRO-MELT or similar low temperature plastic). This covering material can incorporate one or more visual attributes (such as colors, letters or numbers, images, patterns, or textures) so that the location of the flexible RFID tag assembly can be easily seen. For example, the covering material can have a color that contrasts with the color of the rest of the object. Also, such contrasting coloring can provide an easily seen indication that the particular object has an associated RFID tag. This may be useful where objects that include flexible RFID tag assemblies and RFID tag ICs are used with objects that might not include any RFID tags at all. In this situation, a visual attribute that distinguishes those objects that have RFID tags from those objects that do not provides a mechanism for a technician to easily identify those objects than can be read using the techniques described here.
[0052] Moreover, a transparent covering material can be used so that the underlying flexible RFID tag assembly can be seen. [0053] Alternatively, the covering material can have a color that matches the color of the associated object so as to not draw visual attention to the flexible RFID tag assembly.
[0054] The techniques described above in connection with FIGS. 1-2 can be used with other objects. For example, such flexible RFID tag assemblies can be placed on the protective caps described above. Also, such flexible RFID tag assemblies described above in connection with FIGS. 1-2 can be used with other types of connectors, cables, and network elements (such as connectors, cables, and network elements that work with cables that use copper (or other metal) wires).
[0055] A number of embodiments have been described. Nevertheless, it will be understood that various modifications to the described embodiments may be made without departing from the spirit and scope of the claimed invention. Also,
combinations of the individual features of the above-described embodiments are considered within the scope of the inventions disclosed here.
EXAMPLE EMBODIMENTS
[0056] Example 1 includes a RFID tag assembly comprising: a RFID tag integrated circuit; and a coil connected to the RFID tag integrated circuit; wherein the coil is configured to be wrapped around an object having a curved or multi-sided surface so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
[0057] Example 2 includes the RFID tag assembly of Example 1, wherein the coil is wrapped around the object so that an RFID reader that is positioned near any point on the coil is coupled to the RFID tag integrated circuit for performing a localized read of the RFID tag integrated circuit. [0058] Example 3 includes the RFID tag assembly of any of the Examples 1-2, further comprising a flexible antenna circuit that includes the coil.
[0059] Example 4 includes the RFID tag assembly of Example 3, wherein the flexible antenna circuit comprises a flexible printed circuit board.
[0060] Example 5 includes the RFID tag assembly of any of the Examples 3-4, wherein the flexible antenna circuit is connected to the RFID tag integrated circuit using an air bridge structure or double sided PCB track connected by vias.
[0061] Example 6 includes the RFID tag assembly of any of the Examples 3-5, wherein the flexible antenna circuit further comprises tuning components.
[0062] Example 7 includes the RFID tag assembly of any of the Examples 1-6, wherein the coil comprises an open center loop.
[0063] Example 8 includes an apparatus comprising: an object; a RFID tag integrated circuit mounted to the object; and a coil mounted to the object and connected to the RFID tag integrated circuit; wherein the coil is configured to be wrapped around the object so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
[0064] Example 9 includes the apparatus of Example 8, wherein the object comprises a connector attached to a cable.
[0065] Example 10 includes the apparatus of Example 9, wherein the connector comprises one of a fiber optic connector assembly, a fiber optic adapter assembly, and a copper connector assembly. [0066] Example 11 includes the apparatus of any of the Examples 9-10, wherein the connector comprises one of a hardened fiber optic connector assembly and a hardened fiber optic adapter assembly.
[0067] Example 12 includes the apparatus of any of the Examples 9-11, wherein the connector has a generally cylindrical shape, wherein the coil is disposed around the connector.
[0068] Example 13 includes a connector assembly for attaching to a communication cable, the connector assembly comprising: a body; a connector housed within the body and configured to attach to the communication cable; a RFID tag integrated circuit; and a coil connected to the RFID tag integrated circuit; wherein the coil is configured to be wrapped around the connector assembly so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
[0069] Example 14 includes the connector assembly of Example 13, wherein the connector assembly comprises one of an optical connector assembly comprising a fiber optic connector; an optical adapter assembly comprising a fiber optic adapter; and a copper connector assembly comprising a copper connector.
[0070] Example 15 includes the connector assembly of any of the Examples 13-14, wherein the connector assembly comprises a hardened connector assembly; wherein the connector comprises a fiber optic connector; and wherein the body comprises a nut configured to be screwed into a socket of a hardened adapter assembly.
[0071] Example 16 includes the connector assembly of any of the Examples 13-15, wherein the connector assembly comprises a hardened adapter assembly; wherein the connector comprises a fiber optic adapter; and wherein the body comprises a socket configured so that a hardened connector assembly can be screwed into the socket. [0072] Example 17 includes the connector assembly of any of the Examples 13-16, wherein the body comprises a recess formed therein, wherein the coil is disposed in the recess and wrapped around the body.
[0073] Example 18 includes the connector assembly of Example 17, wherein the coil and the RFID tag integrated circuit are included in a flexible RFID tag assembly that is over- moulded.
[0074] Example 19 includes the connector assembly of any of the Examples 13-18, wherein the coil is wrapped around the connector assembly so that an RFID reader that is positioned near any point on the coil is coupled to the RFID tag for performing a localized read of the RFID tag integrated circuit.
[0075] Example 20 includes the connector assembly of any of the Examples 13-19, wherein the connector assembly is configured to be attached to a second connector assembly, the second connector assembly comprising: a second RFID tag integrated circuit; and a second coil connected to the second RFID tag integrated circuit; wherein the second coil is configured to be wrapped around the second connector assembly so that an RFID reader can physically access the second coil from multiple directions in order to inductively couple the RFID reader to the second RFID tag integrated circuit in connection with the RFID reader performing a localized read of the second RFID tag integrated circuit.
[0076] Example 21 includes the connector assembly of Example 20, wherein the connector assembly is configured so that the RFID tag integrated circuit and the coil are disposed on the connector assembly so as to not overlap the second RFID tag integrated circuit and the second coil disposed on the second connector assembly when the connector assembly is attached to the second connector assembly.
[0077] Example 22 includes the connector assembly of any of the Examples 20-21, wherein the connector assembly is configured so that the RFID tag integrated circuit and the coil are disposed on the connector assembly so as to overlap the second RFID tag integrated circuit and the second coil disposed on the second connector assembly when the connector assembly is attached to the second connector assembly so that the RFID tag integrated circuit attached to the connector assembly and the second RFID tag integrated circuit attached to the second connector assembly can be read in a single read transaction.
[0078] Example 23 includes a network element comprising: at least one port to which at least one communication cable can be attached, the port having an exterior surface that can be accessed from multiple directions; and a RFID tag integrated circuit associated with each port; a coil connected to the RFID tag integrated circuit; wherein the coil is configured to be wrapped around the port so that an RFID reader can physically access the coil from multiple directions in order to inductively couple the RFID reader to the RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
[0079] Example 24 includes the network element of Example 23, wherein the network element comprises: a plurality of ports, each port having associated therewith: a respective RFID tag integrated circuit; and a respective coil connected to the RFID tag integrated circuit; wherein each coil is configured to be wrapped around the associated port so that an RFID reader can physically access the respective coil from multiple directions in order to inductively couple the RFID reader to the associated RFID tag integrated circuit in connection with the RFID reader performing a localized read of the RFID tag integrated circuit.
[0080] Example 25 includes the network element of any of the Examples 23-24, wherein the network element comprises one of a multiport service terminal (MST) and an optical terminal enclosure (OTE).
[0081] Example 26 includes the network element of any of the Examples 23-25, wherein each port comprises a respective first connector assembly to which a respective second connector assembly can be attached. [0082] Example 27 includes the network element of Example 26, wherein each port comprises a respective threaded opening formed in a housing and a respective hardened adapter assembly screwed into the threaded opening; wherein the flexible RFID tag assembly for the port is wrapped around the respective hardened adapter assembly; and wherein each hardened adapter assembly is configured to be attached to a respective hardened connector assembly.
[0083] Example 28 includes the network element of any of the Examples 23-27, wherein the coil is included in a flexible antenna circuit that comprises a flexible printed circuit board that is disposed around the port.

Claims

CLAIMS What is claimed is:
1. A RFID tag assembly (100) comprising:
a RFID tag integrated circuit (102); and
a coil (106) connected to the RFID tag integrated circuit (102);
wherein the coil (106) is configured to be wrapped around an object (300) having a curved or multi-sided surface so that an RFID reader (302) can physically access the coil (106) from multiple directions in order to inductively couple the RFID reader (302) to the RFID tag integrated circuit (102) in connection with the RFID reader (302) performing a localized read of the RFID tag integrated circuit (102).
2. The RFID tag assembly (100) of claim 1, wherein the coil (106) is wrapped around the object (300) so that an RFID reader (302) that is positioned near any point on the coil (106) is coupled to the RFID tag integrated circuit (102) for performing a localized read of the RFID tag integrated circuit (102).
3. The RFID tag assembly (100) of claim 1, further comprising a flexible antenna circuit (104) that includes the coil (106).
4. The RFID tag assembly (100) of claim 3, wherein the flexible antenna circuit (104) comprises a flexible printed circuit board.
5. The RFID tag assembly (100) of claim 3, wherein the flexible antenna circuit (104) is connected to the RFID tag integrated circuit (102) using an air bridge structure or double sided PCB track connected by vias.
6. The RFID tag assembly (100) of claim 3, wherein the flexible antenna circuit (104) further comprises tuning components (108).
7. The RFID tag assembly (100) of claim 1, wherein the coil (106) comprises an open center loop.
8. An apparatus comprising:
an object (300);
a RFID tag integrated circuit (102) mounted to the object (300); and
a coil (106) mounted to the object (300) and connected to the RFID tag integrated circuit (102);
wherein the coil (106) is configured to be wrapped around the object (300) so that an RFID reader (302) can physically access the coil (106) from multiple directions in order to inductively couple the RFID reader (302) to the RFID tag integrated circuit (102) in connection with the RFID reader (302) performing a localized read of the RFID tag integrated circuit (102).
9. The apparatus of claim 8, wherein the object (300) comprises a connector (400, 402) attached to a cable (404, 406).
10. The apparatus of claim 9, wherein the connector (400, 402) comprises one of a fiber optic connector assembly (400), a fiber optic adapter assembly (402), and a copper connector assembly.
11. The apparatus of claim 9, wherein the connector (400, 402) comprises one of a hardened fiber optic connector assembly (400) and a hardened fiber optic adapter assembly (402).
12. The apparatus of claim 9, wherein the connector (400, 402) has a generally cylindrical shape, wherein the coil (106) is disposed around the connector (400, 402).
13. A connector assembly (400, 402) for attaching to a communication cable (404, 406), the connector assembly (400, 402) comprising:
a body (414, 420);
a connector (408, 410) housed within the body (414, 420) and configured to attach to the communication cable (404, 406);
a RFID tag integrated circuit (102, 438, 440); and
a coil (106) connected to the RFID tag integrated circuit (102, 438, 440);
wherein the coil (106) is configured to be wrapped around the connector assembly (400, 402) so that an RFID reader (302) can physically access the coil (106) from multiple directions in order to inductively couple the RFID reader (302) to the RFID tag integrated circuit (102, 438, 440) in connection with the RFID reader (302) performing a localized read of the RFID tag integrated circuit (102, 438, 440).
14. The connector assembly (400, 402) of claim 13, wherein the connector assembly (400, 402) comprises one of an optical connector assembly (400) comprising a fiber optic connector (408); an optical adapter assembly (402) comprising a fiber optic adapter (410); and a copper connector assembly comprising a copper connector.
15. The connector assembly (400, 402) of claim 13, wherein the connector assembly (400, 402) comprises a hardened connector assembly (400);
wherein the connector (408, 410) comprises a fiber optic connector (408); and wherein the body (414, 420) comprises a nut (414) configured to be screwed into a socket (420) of a hardened adapter assembly (402).
16. The connector assembly (400, 402) of claim 13, wherein the connector assembly (400, 402) comprises a hardened adapter assembly (402);
wherein the connector (408, 410) comprises a fiber optic adapter (410); and wherein the body (414, 420) comprises a socket (420) configured so that a hardened connector assembly (402) can be screwed into the socket (420).
17. The connector assembly (400, 402) of claim 13, wherein the body (414, 420) comprises a recess (442, 448) formed therein, wherein the coil (106) is disposed in the recess (442, 448) and wrapped around the body (414, 420).
18. The connector assembly (400, 402) of claim 17, wherein the coil (106) and the RFID tag integrated circuit (102, 438, 440) are included in a flexible RFID tag assembly (100, 434, 436) that is over-moulded.
19. The connector assembly (400, 402) of claim 13, wherein the coil (106) is wrapped around the connector assembly (400, 402) so that an RFID reader (302) that is positioned near any point on the coil (106) is coupled to the RFID tag for performing a localized read of the RFID tag integrated circuit (102, 438, 440).
20. The connector assembly (400, 402) of claim 13, wherein the connector assembly (400, 402) is configured to be attached to a second connector assembly (400, 402), the second connector assembly (400, 402) comprising:
a second RFID tag integrated circuit (102, 438, 440); and
a second coil (106) connected to the second RFID tag integrated circuit (102, 438,
440);
wherein the second coil (106) is configured to be wrapped around the second connector assembly (400, 402) so that an RFID reader (302) can physically access the second coil (106) from multiple directions in order to inductively couple the RFID reader (302) to the second RFID tag integrated circuit (102, 438, 440) in connection with the RFID reader (302) performing a localized read of the second RFID tag integrated circuit (102, 438, 440).
21. The connector assembly (400, 402) of claim 20, wherein the connector assembly (400, 402) is configured so that the RFID tag integrated circuit (102, 438, 440) and the coil (106) are disposed on the connector assembly (400, 402) so as to not overlap the second RFID tag integrated circuit (102, 438, 440) and the second coil (106) disposed on the second connector assembly (400, 402) when the connector assembly (400, 402) is attached to the second connector assembly (400, 402).
22. The connector assembly (400, 402) of claim 20, wherein the connector assembly (400, 402) is configured so that the RFID tag integrated circuit (102, 438, 440) and the coil (106) are disposed on the connector assembly (400, 402) so as to overlap the second RFID tag integrated circuit (102, 438, 440) and the second coil (106) disposed on the second connector assembly (400, 402) when the connector assembly (400, 402) is attached to the second connector assembly (400, 402) so that the RFID tag integrated circuit (102, 438, 440) attached to the connector assembly (400, 402) and the second RFID tag integrated circuit (102, 438, 440) attached to the second connector assembly (400, 402) can be read in a single read transaction.
23. A network element (424) comprising:
at least one port (426) to which at least one communication cable (404, 406) can be attached, the port (426) having an exterior surface that can be accessed from multiple directions; and
a RFID tag integrated circuit (102, 438, 440) associated with each port (426); a coil (106) connected to the RFID tag integrated circuit (102, 438, 440);
wherein the coil (106) is configured to be wrapped around the port (426) so that an RFID reader (302) can physically access the coil (106) from multiple directions in order to inductively couple the RFID reader (302) to the RFID tag integrated circuit (102, 438, 440) in connection with the RFID reader (302) performing a localized read of the RFID tag integrated circuit (102, 438, 440).
24. The network element (424) of claim 23, wherein the network element (424) comprises: a plurality of ports (426), each port (426) having associated therewith:
a respective RFID tag integrated circuit (102, 438, 440); and a respective coil (106) connected to the RFID tag integrated circuit (102,
438, 440);
wherein each coil (106) is configured to be wrapped around the associated port (426) so that an RFID reader (302) can physically access the respective coil (106) from multiple directions in order to inductively couple the RFID reader (302) to the associated RFID tag integrated circuit (102, 438, 440) in connection with the RFID reader (302) performing a localized read of the RFID tag integrated circuit (102, 438, 440).
25. The network element (424) of claim 23, wherein the network element (424) comprises one of a multiport service terminal (MST) and an optical terminal enclosure (OTE).
26. The network element (424) of claim 23, wherein each port (426) comprises a respective first connector assembly (402) to which a respective second connector assembly (400) can be attached.
27. The network element (424) of claim 26, wherein each port (426) comprises a respective threaded opening formed in a housing (428) and a respective hardened adapter assembly (402) screwed into the threaded opening;
wherein the flexible RFID tag assembly (100, 434, 436) for the port (426) is wrapped around the respective hardened adapter assembly (402); and
wherein each hardened adapter assembly (402) is configured to be attached to a respective hardened connector assembly (400).
28. The network element (424) of claim 23, wherein the coil (106) is included in a flexible antenna circuit (104) that comprises a flexible printed circuit board that is disposed around the port (426).
PCT/GB2014/051777 2013-06-12 2014-06-10 Flexible rfid tag assembly WO2014199136A1 (en)

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US61/833,987 2013-06-12

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