WO2006098004A1 - アンテナ、及びrfidタグ - Google Patents
アンテナ、及びrfidタグ Download PDFInfo
- Publication number
- WO2006098004A1 WO2006098004A1 PCT/JP2005/004549 JP2005004549W WO2006098004A1 WO 2006098004 A1 WO2006098004 A1 WO 2006098004A1 JP 2005004549 W JP2005004549 W JP 2005004549W WO 2006098004 A1 WO2006098004 A1 WO 2006098004A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- line
- rfid tag
- point
- antenna element
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0093—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices having a fractal shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
- H01Q9/285—Planar dipole
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/715—Interference-related aspects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/715—Interference-related aspects
- H04B2001/7154—Interference-related aspects with means for preventing interference
Definitions
- the present invention relates to antenna technology, and more particularly to antenna miniaturization technology.
- RFID Radio Frequency Identification
- RFID tag in which an IC chip and an antenna are embedded is attached to an object or person, and a device called an RFID reader / writer communicates with an RFI D tag using radio waves.
- the RFID reader / writer reads the information stored in the IC chip (RFID tag IC) and recognizes the object or person.
- FIG. 7 shows a first example of an antenna that can be used for an RFID tag.
- This antenna is a basic dipole antenna having a total length of 1Z2 wavelength formed by the antenna line 101, and the RFID tag is configured by connecting this antenna to the RFID tag IC10.
- FIG. 8 shows a second example of an antenna that can be used for an RFID tag.
- This antenna is a basic loop antenna having a full circumference of one wavelength formed by the antenna line 102, and the RFID tag is configured by connecting this antenna to the RFID tag IC10.
- the RFID tag As described above, if a basic antenna such as a dipole antenna or a loop antenna is used as it is, the RFID tag becomes very large. Therefore, the RFID tag is required to have a small antenna. RU
- FIG. 9 shows a third example of an antenna that can be used for an RFID tag.
- This antenna is a miniaturized version of a pair of antenna lines 101 forming a dipole antenna according to the first example shown in FIG.
- FIG. 10 shows a fourth example of an antenna that can be used for an RFID tag.
- the loop-shaped antenna line 102 constituting the loop antenna shown in FIG. 8 is bent along a Hilbert fractal pattern to reduce the size.
- FIG. 11 shows a fifth example of an antenna that can be used for the RFID tag.
- This antenna is a miniaturized version of the loop-shaped antenna line 102 constituting the loop antenna shown in FIG. 8 by bending it along a Koch fractal pattern.
- a fractal is one in which the graphic part is self-similar to the whole as shown in FIG. 12A, which is a partial view of the pattern of FIG. 11, and FIG. 12B, which shows an outline of the pattern.
- the pattern 102a is replaced with the pattern 102b, and the pattern 102b force is also replaced with the pattern 102c. Therefore, a long path length can be obtained by making the shape of the antenna line 102 a fractal pattern.
- Patent Document 1 discloses a technique in which two coils are erected on a ground conductor, and the two coils are connected by a meander-like linear conductor or plate conductor to form a loop antenna.
- Patent Document 2 discloses a technique in which zigzag-shaped paired antenna elements that constitute a dipole antenna are bent along an inner wall surface of a casing. For example, as shown in FIG. 13, a loop antenna in which a linear conductor is bent in a snowflake shape is disclosed in FIG.
- RFID tags that are so-called passive tags that use radio waves from an RFID reader / writer as a power source for the operation of the RFID tag without providing a battery in the RFID tag itself have a high power supply voltage in order to obtain a high power supply voltage.
- An impedance antenna is required.
- Patent Document 1 Japanese Patent Laid-Open No. 2001-284935 (paragraphs [0021]-[0027], FIG. 1)
- Patent Document 2 Japanese Patent Laid-Open No. 2000-349526 (paragraphs [0043]-[0051], FIG. 1)
- Patent Document 3 U.S. Patent No. 6603440 (column 9, line 56-column 10, line 59, Fig. 10A, Fig. 10B, Fig. 11A, Fig. 11B, Fig. 11C)
- the present invention has been made in view of the above-described problems, and the problem to be solved is that even if the conductor line, which is an antenna element, meanders and the antenna is downsized, the decrease in gain is reduced. Is to do.
- An antenna according to an aspect of the present invention is configured such that an antenna element is configured by a conductor line that meanders in a shape in which a plurality of lines of the same shape bent only at an obtuse angle are connected to each other! This feature solves the aforementioned problems.
- the bent portion of the conductor line constituting the antenna element is reduced at right angles or acute angles, so that the loss of high-frequency signal energy is reduced, and as a result, the antenna radiation efficiency is improved.
- the antenna element may constitute a dipole antenna.
- the antenna element forms a loop antenna, and the maximum current point in the antenna element when a high-frequency signal is supplied is the antenna element when the power is supplied. Arranged closer to the feeding point of the antenna element than the maximum voltage point.
- the length of the entire circumference of the antenna element forming the loop antenna may be approximately one wavelength.
- the antenna element is configured so that the line width at the maximum current point of the conductor line is larger than the line width at the feed point in the conductor line. Moyo! / According to this configuration, the current flowing into the power supply device installed at the power supply point is guided near the maximum current point.
- the impedance becomes larger than the body line.
- a high frequency signal is supplied to the antenna element.
- An inductive element that cancels the capacitive component of the power feeding device that feeds the electric power is provided at the feeding point of the antenna element, and the inductive element is a conductor formed by connecting a plurality of identical lines bent only at an obtuse angle. It's formed with tracks!
- an RFID tag including the above-described antenna according to the present invention also relates to the present invention.
- FIG. 1 is a diagram showing a configuration example of an antenna for implementing the present invention.
- FIG. 2A is a diagram showing a first example of a bent shape of a basic line constituting an antenna.
- FIG. 2B is a diagram showing a second example of the bending shape of the basic line constituting the antenna.
- FIG. 2C is a diagram showing a third example of the bending shape of the basic line constituting the antenna.
- FIG. 2D is a diagram showing a fourth example of the bending shape of the basic line constituting the antenna.
- FIG. 3 is a diagram showing an example of a loop antenna configured with the maximum current point approached.
- FIG. 4 is a diagram showing a simulation result of current distribution of the loop antenna shown in FIG.
- FIG. 5 is a diagram showing an example of a loop antenna having a thick line width near the maximum current point on the side opposite to the feeding point.
- FIG. 7 is a diagram showing a first example of an antenna that can be used for an RFID tag.
- FIG. 8 is a diagram showing a second example of an antenna that can be used for an RFID tag.
- FIG. 9 is a diagram showing a third example of an antenna that can be used for an RFID tag.
- FIG. 10 is a diagram showing a fourth example of an antenna that can be used for an RFID tag.
- FIG. 11 is a diagram showing a fifth example of an antenna that can be used for an RFID tag.
- FIG. 12A is a partial view of the antenna shown in FIG.
- FIG. 12B is a diagram for explaining the fractal pattern of FIG. 11.
- FIG. 1 shows an example of the configuration of an antenna embodying the present invention.
- This antenna is a dipole antenna having a total length of 1Z2 wavelength formed by a pair of antenna lines 11 that are conductor lines, and the RFID tag is configured by connecting this antenna to the RFID tag IC10.
- the shape of the antenna element (the pair of antenna lines 11) forming this antenna is replaced by a line bent at an obtuse angle in the straight line portion of the antenna line 101 in FIG. As a result, the bent portions that are perpendicular (90 °) or acute are reduced.
- antenna line 11 is
- the dipole antenna is configured by a conductor line that is meandering in a shape in which a plurality of lines of the same shape bent only at an obtuse angle are connected! /
- the loop antenna may be configured by replacing the straight line portion of the antenna line 102 bent along the fractal pattern as shown in FIGS. 10 and 11 with a line bent at an obtuse angle. Good. The pattern of the replaced antenna line 102 is no longer a fractal! /.
- a line having the same shape as shown in FIG. 2A that is, a line bent only at an obtuse angle of 120 °, for example, is adopted, and a plurality of lines having the same shape are connected.
- the antenna element is formed by meandering in the shape of the conductor, and instead of adopting this shape of the wire, a curve of a shape bent into a semicircle as illustrated in FIG. 2B is used. It can be adopted, or it can be bent into a sinusoidal waveform for one cycle as shown in Fig. 2C. Alternatively, a curved line may be adopted.
- a line with a combination of different shapes such as a combination of the semicircular shape of Fig. 2B and the sinusoidal waveform of Fig. 2C, may be adopted. .
- an RFID tag that is a noisy tag requires an antenna with a high impedance in order to obtain a high power supply voltage.
- the one-wavelength loop antenna as shown in FIG. 8 is preferable as an RFI D tag because of its high impedance (usually about 300 ⁇ ).
- a conventional loop antenna formed by bending a linear conductor as illustrated in FIG. 13 has a feeding point 12a to which an RFID tag is connected in the antenna line 12, and a position of 1Z2 wavelength from the feeding point 12a. The point 12b is far away.
- the antenna line 12 is a conductor line meandering in a shape in which a plurality of identical lines bent only at an obtuse angle are connected to each other!
- a loop antenna with an entire circumference of approximately one wavelength is configured by placing points 12a and 12b close together, and this antenna is used for the RFID tag.
- FIG. 4 shows the result of computer simulation of the current distribution of the high-frequency current when a high-frequency signal is fed to the loop antenna illustrated in FIG.
- the darker the color the larger current flows.
- the point 12b where the high-frequency current is maximum in the antenna line 12 is the point where the high-frequency current is minimum (that is, the point where the high-frequency current is maximum). It can be seen that it is arranged closer to the feeding point 12a than 12c.
- an induction element for canceling the internal capacitance of the RFID tag IC is arranged in parallel with the antenna. May be connected.
- Figure 6 shows the arrangement of the dipole antenna illustrated in Figure 1 at the feed point.
- FIG. 5 is a diagram showing an example in which such an inductive element 13 is inserted in parallel with the RFID tag IC 10 that is placed.
- the inductive element 13 is formed of a conductor line having a shape in which a plurality of identical lines that are bent only at an obtuse angle are connected in the same manner as the antenna element 11. Therefore, the inductive element 13 is also low in energy loss.
- the loop antenna shown in FIGS. 3 and 5 has a line-symmetric shape, but may have an asymmetric shape.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2005/004549 WO2006098004A1 (ja) | 2005-03-15 | 2005-03-15 | アンテナ、及びrfidタグ |
CN2005800487191A CN101128956B (zh) | 2005-03-15 | 2005-03-15 | 天线及rfid标签 |
JP2007507974A JPWO2006098004A1 (ja) | 2005-03-15 | 2005-03-15 | アンテナ、及びrfidタグ |
EP05720805A EP1860728A4 (en) | 2005-03-15 | 2005-03-15 | ANTENNA AND RFID DAY |
US11/898,425 US7773045B2 (en) | 2005-03-15 | 2007-09-12 | Antenna and RFID tag |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2005/004549 WO2006098004A1 (ja) | 2005-03-15 | 2005-03-15 | アンテナ、及びrfidタグ |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/898,425 Continuation US7773045B2 (en) | 2005-03-15 | 2007-09-12 | Antenna and RFID tag |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006098004A1 true WO2006098004A1 (ja) | 2006-09-21 |
Family
ID=36991364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/004549 WO2006098004A1 (ja) | 2005-03-15 | 2005-03-15 | アンテナ、及びrfidタグ |
Country Status (5)
Country | Link |
---|---|
US (1) | US7773045B2 (ja) |
EP (1) | EP1860728A4 (ja) |
JP (1) | JPWO2006098004A1 (ja) |
CN (1) | CN101128956B (ja) |
WO (1) | WO2006098004A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012070678A1 (ja) * | 2010-11-26 | 2012-05-31 | 京セラ株式会社 | アンテナおよびダイポールアンテナならびにそれらを用いた通信装置 |
US11213773B2 (en) | 2017-03-06 | 2022-01-04 | Cummins Filtration Ip, Inc. | Genuine filter recognition with filter monitoring system |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007013167A1 (ja) * | 2005-07-29 | 2007-02-01 | Fujitsu Limited | Rfタグ及びrfタグを製造する方法 |
JP5018884B2 (ja) * | 2007-07-18 | 2012-09-05 | 富士通株式会社 | 無線タグ及び無線タグの製造方法 |
CN102509872A (zh) * | 2011-10-24 | 2012-06-20 | 无锡邦普氿顺微电子有限公司 | 一种uhf rfid电子标签天线 |
JP6161487B2 (ja) * | 2013-09-24 | 2017-07-12 | 峰光電子株式会社 | 読み取りセンサー及び管理システム |
Citations (4)
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US6104349A (en) * | 1995-08-09 | 2000-08-15 | Cohen; Nathan | Tuning fractal antennas and fractal resonators |
US20020113739A1 (en) * | 2000-12-14 | 2002-08-22 | Howard David Amundson | Arrayed-segment loop antenna |
JP2003521146A (ja) * | 2000-01-19 | 2003-07-08 | フラクトゥス・ソシエダッド・アノニマ | 小型空間充填アンテナ |
JP2004112044A (ja) * | 2002-09-13 | 2004-04-08 | Furukawa Electric Co Ltd:The | ループアンテナ |
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US3716861A (en) * | 1971-03-22 | 1973-02-13 | J Root | Serpentine antenna mounted on a rotatable capacitive coupler |
JPS6095711U (ja) | 1983-12-06 | 1985-06-29 | 日本電気株式会社 | キヤビテイバツクスロツトアンテナ |
US6452553B1 (en) * | 1995-08-09 | 2002-09-17 | Fractal Antenna Systems, Inc. | Fractal antennas and fractal resonators |
JP4067672B2 (ja) * | 1998-12-25 | 2008-03-26 | 松下電器産業株式会社 | アンテナ装置並びにそれを用いた無線装置及び無線中継装置 |
JP2000349526A (ja) | 1999-06-08 | 2000-12-15 | Hideo Suyama | 内蔵アンテナ装置 |
GB9913526D0 (en) * | 1999-06-10 | 1999-08-11 | Harada Ind Europ Limited | Multiband antenna |
CN101188325B (zh) * | 1999-09-20 | 2013-06-05 | 弗拉克托斯股份有限公司 | 多级天线 |
JP4160215B2 (ja) * | 1999-09-29 | 2008-10-01 | カルソニックカンセイ株式会社 | 車両用空気調和装置 |
GB2355116B (en) | 1999-10-08 | 2003-10-08 | Nokia Mobile Phones Ltd | An antenna assembly and method of construction |
CN1434988A (zh) * | 2000-01-19 | 2003-08-06 | 弗拉克托斯股份有限公司 | 分形和空间填充传输线,谐振器,滤波器及无源网络元件 |
JP4221878B2 (ja) | 2000-01-25 | 2009-02-12 | ソニー株式会社 | アンテナ装置 |
US7190319B2 (en) * | 2001-10-29 | 2007-03-13 | Forster Ian J | Wave antenna wireless communication device and method |
US6642898B2 (en) * | 2001-05-15 | 2003-11-04 | Raytheon Company | Fractal cross slot antenna |
ATE364911T1 (de) * | 2001-10-16 | 2007-07-15 | Fractus Sa | Belastete antenne |
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JP2003271912A (ja) * | 2002-03-14 | 2003-09-26 | Mitsubishi Materials Corp | Idタグ、idタグを有する集積回路用基板、この集積回路用基板の製造方法、及びid検出装置 |
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JP3898598B2 (ja) * | 2002-08-26 | 2007-03-28 | 株式会社ヨコオ | 送受信モジュール |
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2005
- 2005-03-15 EP EP05720805A patent/EP1860728A4/en not_active Withdrawn
- 2005-03-15 JP JP2007507974A patent/JPWO2006098004A1/ja active Pending
- 2005-03-15 WO PCT/JP2005/004549 patent/WO2006098004A1/ja not_active Application Discontinuation
- 2005-03-15 CN CN2005800487191A patent/CN101128956B/zh not_active Expired - Fee Related
-
2007
- 2007-09-12 US US11/898,425 patent/US7773045B2/en not_active Expired - Fee Related
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US6104349A (en) * | 1995-08-09 | 2000-08-15 | Cohen; Nathan | Tuning fractal antennas and fractal resonators |
JP2003521146A (ja) * | 2000-01-19 | 2003-07-08 | フラクトゥス・ソシエダッド・アノニマ | 小型空間充填アンテナ |
US20020113739A1 (en) * | 2000-12-14 | 2002-08-22 | Howard David Amundson | Arrayed-segment loop antenna |
JP2004112044A (ja) * | 2002-09-13 | 2004-04-08 | Furukawa Electric Co Ltd:The | ループアンテナ |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012070678A1 (ja) * | 2010-11-26 | 2012-05-31 | 京セラ株式会社 | アンテナおよびダイポールアンテナならびにそれらを用いた通信装置 |
JPWO2012070678A1 (ja) * | 2010-11-26 | 2014-05-19 | 京セラ株式会社 | アンテナおよびダイポールアンテナならびにそれらを用いた通信装置 |
US11213773B2 (en) | 2017-03-06 | 2022-01-04 | Cummins Filtration Ip, Inc. | Genuine filter recognition with filter monitoring system |
Also Published As
Publication number | Publication date |
---|---|
CN101128956A (zh) | 2008-02-20 |
EP1860728A4 (en) | 2008-12-24 |
US20080012773A1 (en) | 2008-01-17 |
CN101128956B (zh) | 2012-11-21 |
JPWO2006098004A1 (ja) | 2008-08-21 |
EP1860728A1 (en) | 2007-11-28 |
US7773045B2 (en) | 2010-08-10 |
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