EP1006605B1 - Hand-held apparatus - Google Patents
Hand-held apparatus Download PDFInfo
- Publication number
- EP1006605B1 EP1006605B1 EP99124720.6A EP99124720A EP1006605B1 EP 1006605 B1 EP1006605 B1 EP 1006605B1 EP 99124720 A EP99124720 A EP 99124720A EP 1006605 B1 EP1006605 B1 EP 1006605B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- telephone
- radiation
- patch
- directional
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
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Classifications
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- 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
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/245—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
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- 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
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
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- 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
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
Definitions
- the invention relates to a hand-held apparatus comprising antenna means for emitting a radio signal.
- the portable transmitter and receiver units are usually provided with antennas which have an omnidirectional radiation diagram, as this gives the greatest possible probability that a connection is established to the mobile telephone concerned at a given time, thereby facilitating the system planning of the system operators.
- antennas which have an omnidirectional radiation diagram, as this gives the greatest possible probability that a connection is established to the mobile telephone concerned at a given time, thereby facilitating the system planning of the system operators.
- the users of the mobile telephones wish that the system has a coverage as good as possible.
- the omnidirectional radiation diagram has the drawback that the telephone will usually be arranged in such a manner with respect to a user's head that the head is present precisely where the electrical field from the antenna of the telephone is strongest. This means that a certain power loss will occur, as part of the radiation energy dissipates in the head, and also involves the risk that precisely this energy dissipation may constitute a health hazard. Because of the possible health hazard in particular, it is therefore desired that the radiation should be directed away from the user's head.
- the radiation is mainly directed away from the user's head, the transmission/reception conditions of the telephone will moreover be impaired, unless a base station is present precisely in this direction. Therefore, the solution is useful only in areas where the base stations are located so close to each other that there will always be a sufficiently close base station in the direction concerned.
- US 5 530 919 describes an apparatus which has a built-in directional antenna and a rod antenna.
- the directional antenna is used as a transmitter antenna and the rod antenna as a receiver antenna.
- This apparatus too, therefore relies on the presence of a base station in the direction in which the directional antenna is oriented, as the apparatus can only transmit in this direction.
- the rod antenna enables reception from all directions.
- EP 214 806 describes an apparatus with a built-in directional antenna and a rod antenna. Both antennas are used here as receiver antennas in order to obtain receiver diversity, while only the rod antenna is used as a transmitter antenna. Thus, this apparatus does not avoid radiation into the user's head.
- JP 05 32 7612 A shows a cordless telephone set having a directional and an omnidirectional antenna. During normal calls the omnidirectional antenna is used, whereas the directional antenna is connected instead of the omnidirectional antenna to extend the range between the telephone set and base station.
- an object of the invention is to provide a solution which, under poor transmission/reception conditions, is capable of transmitting and receiving with a quality which corresponds to the normal mobile telephones having omnidirectional radiation characteristic, while exposing the user's head to the least possible radiation risk.
- the antenna having omnidirectional radiation characteristic is a telescoping antenna, while the antenna having directional radiation characteristic is a patch antenna.
- the telescoping antenna may be adapted to be connected only when it is extended fully or partly, as stated in claim 3. Hereby, it is the user himself who decides whether the transmission/reception conditions are so poor that it is necessary to connect the telescoping antenna.
- the apparatus may comprise means for connecting and disconnecting the telescoping antenna in response to a received signal. This may take place e.g. in that a base station, when it is difficult for it to receive the signal emitted from the apparatus, requests the apparatus to connect the telescoping antenna.
- the apparatus comprises means for measuring the field strength of a signal received on the patch antenna, and that the telescoping antenna is adapted to be connected only when said field strength is below a specific value, the received signal level being then used as an indicator of whether the transmitted signals are sufficiently strong in a direction toward the base station. This is possible since the apparatus normally transmits to and receives from one and the same base station.
- US 5 530 919 discloses an apparatus which has an incorporated antenna and a shield which is disposed between the antenna and the user's head. However, they are two separate components which therefore still take up some space. Accordingly, a further object of the invention is to provide an apparatus having a built-in patch antenna which takes up less space than in the known devices.
- a shield which surrounds some of the electronic components of the apparatus and consists of an insulating material metallized on the side facing away from the components as well as on the side facing the components, in that at least part of the metallization facing away from the components constitutes a patch antenna which is adapted to transmit and/or receive said radio signals.
- devices of this type will be provided with a shield against radio frequency signals. It will usually be a metallized plastics shield which is metallized on both sides for reasons of production, so that in fact it is a double shield.
- the inner side of the shield can still serve the function of a shield against radio frequency signals, while constituting the ground plane associated with the patch antenna.
- the desired radiation diagram is achieved in that the patch antenna, is disposed on the side of the apparatus which, when used by a person, faces away from the person. For a mobile telephone, this will be the rear side of the telephone.
- the directional effect is achieved because the other metal parts and printed circuit boards of the telephone perform a shielding effect toward the person.
- a holder for such an apparatus is provided with a patch antenna which is adapted to cooperate with the corresponding patch antenna on an apparatus placed in a holder, it is ensured that the radio frequency signals can be transferred wirelessly between the two patch antennas, thereby avoiding the use of coaxial connectors.
- the holder comprises means for ensuring a specific position of the two patch antennas with respect to each other when an apparatus is placed in the holder, the best possible transfer of signals is obtained between the two patch antennas, as these will be positioned in the same manner with respect to each other each time.
- the invention relates to a method of transferring radio signals between a hand-held apparatus and a radio installation fixedly mounted in a vehicle, comprising transferring the signals between two patch antennas which are placed in the apparatus and a holder therefor, respectively.
- a printed circuit board 1 mounts a plurality of electronic components 2, and owing to incident and emanating radiation of radio frequency signals the components are surrounded by a shield 3, which typically consists of a plastics material 4 provided with a metallization 5, 6 on both sides.
- a shield 3 typically consists of a plastics material 4 provided with a metallization 5, 6 on both sides.
- Metallization on one of the sides will normally be sufficient to perform the shielding function; but, generally, the shield will be metallized on both sides for reasons of production. This means that the metallization on the outer side may be used for other purposes.
- Fig. 2 It is shown in fig. 2 how this may be utilized for a patch antenna according to the invention.
- the metallization 6 is still present on the inner side of the plastics material 4, while the metallization 5 from fig. 1 on the areas 7 and 8 is removed.
- the metallization constitutes a patch antenna 9 on the central part of the outer side.
- This patch antenna inter alia because of the shielding metallization 6, will particularly radiate radio frequency signals in a direction away from the plastics material 4 and thereby away from the components 2.
- the printed circuit board 1 itself and the other metal parts of the telephone will provide a further shielding effect in the opposite direction.
- FIG 3 shows that when the shield 4 with the patch antenna 9 is placed on the rear side 10 of a telephone 11, a radiation diagram is obtained where the radiation 12 is directed away from the person 13 who uses the telephone. It will be seen that the telephone 11 is also provided with a rod antenna 14 which, in this situation, is not connected and therefore does not emit radio signals.
- the rod antenna 14 may be arranged as a telescoping antenna which is connected only when it is extended. In that case, it has an omnidirectional radiation diagram, which means that when it is extended, the telephone 11, generally speaking, emits (and receives) radio signals equally well in all directions, and thus also in the direction of the person 13. The idea is thus that in areas having sufficient radio coverage, the radiation 12 from the patch antenna 9 will be sufficient to ensure connection, as there will usually be a sufficiently close base station in the direction of the radiation 12. The telescoping antenna 14 may thus be retracted and thereby be disconnected. Then, the person 13 will not be exposed to the strong radiation from the telephone. This corresponds to the situation shown in fig. 3 .
- the antenna 14 may then be extended and thereby connected so that the telephone 11 has the omnidirectional radiation diagram with the radiation 15.
- the person 13 is exposed to radiation in the same manner as in ordinary mobile telephones which are just provided with an omnidirectional antenna; but, as mentioned, this will just be the case where the radio coverage is not very good.
- the radio coverage in urban areas will usually be sufficient for the situation in fig. 3 to be used, thereby avoiding exposing the person to the incident radiation, while outside the urban areas it will typically be necessary to supplement with the telescoping antenna and the associated incident radiation of radio energy. For the great majority of subscribers, the radiation to which they are exposed will thus be reduced considerably.
- Fig. 5 shows a block diagram for an alternative embodiment.
- the signal to and from the antenna 4 is here connected to the transmitting/receiving circuit 16 of the telephone via a switch 17.
- a detecting circuit 18 can measure the field strength of a signal received on the patch antenna 9 and control the switch 17 in response thereto. If the field strength is above a predetermined threshold value, the connection between the antenna 14 and the transmitting/receiving circuit is disconnected, while, correspondingly, this connection is established when the field strength of the received signal is below this threshold value.
- the antenna 14 is connected only when the signal received on the patch antenna 9 is too low to ensure a good connection.
- the antenna 14 is a telescoping antenna, the full effect of this principle is achieved only if the antenna is extended, of course.
- a special signal may be transmitted from the base station to the telephone if the signal received therefrom is too weak, and the detecting circuit 18 may then be adapted to receive this signal and control the switch 17 in response thereto.
- the signal received on the base station that decides whether it is necessary to connect the omnidirectional antenna 14.
- the coaxial cables may be replaced by two patch antennas arranged opposite to each other, as will be seen in fig. 6 .
- the holder 20, also called cradle, of the telephone is provided with a patch antenna 19 whose size corresponds to the size of the patch antenna 9 in the telephone, and which is arranged so that it will be right opposite it when the telephone is placed in the holder.
- the patch antenna 19 is connected to the external antenna by means of the cable 21.
- the holder 20 may moreover be provided with e.g. guide rails capable of ensuring that a telephone is always placed in the holder such that the two patch antennas are right opposite each other and at a well-defined distance from each other.
- the radio frequency signals are thus transferred wirelessly between the two patch antennas. This means that the coaxial connectors may be saved, while obtaining a solution which is not subjected to wear, as is the case with the coaxial connectors.
Description
- The invention relates to a hand-held apparatus comprising antenna means for emitting a radio signal.
- In e.g. modern mobile telephone systems the portable transmitter and receiver units are usually provided with antennas which have an omnidirectional radiation diagram, as this gives the greatest possible probability that a connection is established to the mobile telephone concerned at a given time, thereby facilitating the system planning of the system operators. Of course, also the users of the mobile telephones wish that the system has a coverage as good as possible.
- The omnidirectional radiation diagram, however, has the drawback that the telephone will usually be arranged in such a manner with respect to a user's head that the head is present precisely where the electrical field from the antenna of the telephone is strongest. This means that a certain power loss will occur, as part of the radiation energy dissipates in the head, and also involves the risk that precisely this energy dissipation may constitute a health hazard. Because of the possible health hazard in particular, it is therefore desired that the radiation should be directed away from the user's head.
- A proposal for the solution of this problem is known from
WO 94/22235 - Another solution is known from
WO 95/24746 - It is also known to provide a mobile telephone with two different antennas.
US 5 530 919 , e.g., describes an apparatus which has a built-in directional antenna and a rod antenna. The directional antenna is used as a transmitter antenna and the rod antenna as a receiver antenna. This apparatus, too, therefore relies on the presence of a base station in the direction in which the directional antenna is oriented, as the apparatus can only transmit in this direction. On the other hand, the rod antenna enables reception from all directions. - Also
EP 214 806 -
JP 05 32 7612 A - Accordingly, an object of the invention is to provide a solution which, under poor transmission/reception conditions, is capable of transmitting and receiving with a quality which corresponds to the normal mobile telephones having omnidirectional radiation characteristic, while exposing the user's head to the least possible radiation risk.
- This is achieved by the features of the independent claims
- Consequently, it is possible to use one or both antennas depending on the reception conditions. It may be ensured in this manner that the user's head is exposed to radiation only when this is necessary owing to the transmission/reception conditions.
- This is possible in particular when one transmitter antenna has an omnidirectional radiation characteristic, and the other has a directional radiation characteristic. The antenna having omnidirectional radiation characteristic is then used only when it is necessary owing to the transmission/reception conditions.
- In an expedient embodiment of the invention, which is defined in
claim 2, the antenna having omnidirectional radiation characteristic is a telescoping antenna, while the antenna having directional radiation characteristic is a patch antenna. - The telescoping antenna may be adapted to be connected only when it is extended fully or partly, as stated in claim 3. Hereby, it is the user himself who decides whether the transmission/reception conditions are so poor that it is necessary to connect the telescoping antenna.
- Alternatively the apparatus may comprise means for connecting and disconnecting the telescoping antenna in response to a received signal. This may take place e.g. in that a base station, when it is difficult for it to receive the signal emitted from the apparatus, requests the apparatus to connect the telescoping antenna. Another possibility is that the apparatus comprises means for measuring the field strength of a signal received on the patch antenna, and that the telescoping antenna is adapted to be connected only when said field strength is below a specific value, the received signal level being then used as an indicator of whether the transmitted signals are sufficiently strong in a direction toward the base station. This is possible since the apparatus normally transmits to and receives from one and the same base station.
- Particularly as regards mobile telephones, a small and handy size is of great importance, and this therefore makes it necessary that the two antennas must be capable of being integrated in the apparatus without this adding considerably to the size of it. Since the omnidirectional antenna is already included in the design of most existing apparatuses, this means that it must be possible to incorporate the directional antenna without changing the design of the apparatus considerably.
- The above-mentioned
US 5 530 919 discloses an apparatus which has an incorporated antenna and a shield which is disposed between the antenna and the user's head. However, they are two separate components which therefore still take up some space. Accordingly, a further object of the invention is to provide an apparatus having a built-in patch antenna which takes up less space than in the known devices. - A shield which surrounds some of the electronic components of the apparatus and consists of an insulating material metallized on the side facing away from the components as well as on the side facing the components, in that at least part of the metallization facing away from the components constitutes a patch antenna which is adapted to transmit and/or receive said radio signals.
- Typically, devices of this type will be provided with a shield against radio frequency signals. It will usually be a metallized plastics shield which is metallized on both sides for reasons of production, so that in fact it is a double shield. When the outer side of the shield (or part thereof) is used as a patch antenna, the inner side of the shield can still serve the function of a shield against radio frequency signals, while constituting the ground plane associated with the patch antenna.
- Since the radiation diagram from such a patch antenna will be very directional, the desired radiation diagram is achieved in that the patch antenna, is disposed on the side of the apparatus which, when used by a person, faces away from the person. For a mobile telephone, this will be the rear side of the telephone. The directional effect is achieved because the other metal parts and printed circuit boards of the telephone perform a shielding effect toward the person.
- When hand-held devices for the emission of radio signals, such as e.g. portable mobile telephones, are used in cars, the telephone is frequently connected to an antenna on the roof of the car in order to increase the range of the telephone. The transport of radio frequency signals between the car telephone and the external antenna of the car usually takes place via coaxial cables, typically in that the telephone has a coaxial connector in the bottom to which the external antenna of the car is connected. In practice, this is inexpedient, however, as the coaxial connectors concerned are relatively expensive and also rather fragile and thus subjected to wear.
- When, a holder for such an apparatus is provided with a patch antenna which is adapted to cooperate with the corresponding patch antenna on an apparatus placed in a holder, it is ensured that the radio frequency signals can be transferred wirelessly between the two patch antennas, thereby avoiding the use of coaxial connectors.
- When, moreover the holder comprises means for ensuring a specific position of the two patch antennas with respect to each other when an apparatus is placed in the holder, the best possible transfer of signals is obtained between the two patch antennas, as these will be positioned in the same manner with respect to each other each time.
- Finally, the invention relates to a method of transferring radio signals between a hand-held apparatus and a radio installation fixedly mounted in a vehicle, comprising transferring the signals between two patch antennas which are placed in the apparatus and a holder therefor, respectively.
- The invention will now be explained more fully below with reference to the drawing, in which
-
fig. 1 shows part of a circuit in an existing mobile telephone, -
fig. 2 shows the structure of a patch antenna according to the invention, -
fig. 3 shows the radiation from a mobile telephone having a patch antenna according to the invention, -
fig. 4 shows the radiation from a mobile telephone having a patch antenna as well as an activated telescoping antenna, -
fig. 5 shows a block diagram for an alternative embodiment of the invention, and -
fig. 6 shows a mobile telephone placed in a specially adapted holder having a path antenna. - It is shown in
fig. 1 how part of the circuit in existing mobile telephones may be designed. A printedcircuit board 1 mounts a plurality ofelectronic components 2, and owing to incident and emanating radiation of radio frequency signals the components are surrounded by a shield 3, which typically consists of aplastics material 4 provided with ametallization 5, 6 on both sides. Metallization on one of the sides will normally be sufficient to perform the shielding function; but, generally, the shield will be metallized on both sides for reasons of production. This means that the metallization on the outer side may be used for other purposes. - It is shown in
fig. 2 how this may be utilized for a patch antenna according to the invention. Themetallization 6 is still present on the inner side of theplastics material 4, while the metallization 5 fromfig. 1 on theareas patch antenna 9 on the central part of the outer side. This patch antenna, inter alia because of the shieldingmetallization 6, will particularly radiate radio frequency signals in a direction away from theplastics material 4 and thereby away from thecomponents 2. The printedcircuit board 1 itself and the other metal parts of the telephone will provide a further shielding effect in the opposite direction.Fig. 3 shows that when theshield 4 with thepatch antenna 9 is placed on the rear side 10 of atelephone 11, a radiation diagram is obtained where theradiation 12 is directed away from theperson 13 who uses the telephone. It will be seen that thetelephone 11 is also provided with arod antenna 14 which, in this situation, is not connected and therefore does not emit radio signals. - As appears from
fig. 4 , therod antenna 14 may be arranged as a telescoping antenna which is connected only when it is extended. In that case, it has an omnidirectional radiation diagram, which means that when it is extended, thetelephone 11, generally speaking, emits (and receives) radio signals equally well in all directions, and thus also in the direction of theperson 13. The idea is thus that in areas having sufficient radio coverage, theradiation 12 from thepatch antenna 9 will be sufficient to ensure connection, as there will usually be a sufficiently close base station in the direction of theradiation 12. Thetelescoping antenna 14 may thus be retracted and thereby be disconnected. Then, theperson 13 will not be exposed to the strong radiation from the telephone. This corresponds to the situation shown infig. 3 . - In areas where the radio coverage is not good enough for this, the
antenna 14 may then be extended and thereby connected so that thetelephone 11 has the omnidirectional radiation diagram with the radiation 15. In this situation, which corresponds tofig. 4 , theperson 13 is exposed to radiation in the same manner as in ordinary mobile telephones which are just provided with an omnidirectional antenna; but, as mentioned, this will just be the case where the radio coverage is not very good. In practice, the radio coverage in urban areas will usually be sufficient for the situation infig. 3 to be used, thereby avoiding exposing the person to the incident radiation, while outside the urban areas it will typically be necessary to supplement with the telescoping antenna and the associated incident radiation of radio energy. For the great majority of subscribers, the radiation to which they are exposed will thus be reduced considerably. In the embodiment described above, theomnidirectional antenna 14 is thus connected in that the user himself extends it when the transmission/reception conditions so require.Fig. 5 shows a block diagram for an alternative embodiment. The signal to and from theantenna 4 is here connected to the transmitting/receivingcircuit 16 of the telephone via aswitch 17. A detectingcircuit 18 can measure the field strength of a signal received on thepatch antenna 9 and control theswitch 17 in response thereto. If the field strength is above a predetermined threshold value, the connection between theantenna 14 and the transmitting/receiving circuit is disconnected, while, correspondingly, this connection is established when the field strength of the received signal is below this threshold value. Thus, theantenna 14 is connected only when the signal received on thepatch antenna 9 is too low to ensure a good connection. Since transmission takes place to one and the same base station, the signal received will frequently be a sufficiently good indicator of whether the emitted signal is sufficiently strong. If, in this situation too, theantenna 14 is a telescoping antenna, the full effect of this principle is achieved only if the antenna is extended, of course. - Alternatively, a special signal may be transmitted from the base station to the telephone if the signal received therefrom is too weak, and the detecting
circuit 18 may then be adapted to receive this signal and control theswitch 17 in response thereto. Hereby, it will be the signal received on the base station that decides whether it is necessary to connect theomnidirectional antenna 14. - With the patch antenna, described above, on the rear side of the telephone, it is also possible to obtain a much simpler connection to an external antenna in e.g. a car than has been possible in the past. An external antenna on e.g. the roof of the car is used for increasing the range of the telephone. Till now, the transfer of the radio frequency signals between the mobile telephone and the external antenna has usually taken place by means of coaxial cables, as the telephone e.g. has a coaxial connector in the bottom to which the external antenna may be connected.
- According to the invention, however, the coaxial cables may be replaced by two patch antennas arranged opposite to each other, as will be seen in
fig. 6 . Theholder 20, also called cradle, of the telephone is provided with apatch antenna 19 whose size corresponds to the size of thepatch antenna 9 in the telephone, and which is arranged so that it will be right opposite it when the telephone is placed in the holder. Thepatch antenna 19 is connected to the external antenna by means of thecable 21. Theholder 20 may moreover be provided with e.g. guide rails capable of ensuring that a telephone is always placed in the holder such that the two patch antennas are right opposite each other and at a well-defined distance from each other. - The radio frequency signals are thus transferred wirelessly between the two patch antennas. This means that the coaxial connectors may be saved, while obtaining a solution which is not subjected to wear, as is the case with the coaxial connectors.
- Although a preferred embodiment of the present invention has been described and shown, the invention is not restricted to it, but may also be embodied in other ways within the subject-matter defined in the following patent claims.
Claims (6)
- A hand-held apparatus (11) which comprises at least two transmitter antennas (9, 14) for emitting a radio signal, the first one (14) of the at least two transmitter antennas has a omnidirectional radiation characteristic, and the second one (9) of the at least two transmitter antennas has a directional characteristic, characterized in that the antenna (9) having a directional characteristic is on the rear side of the hand-held apparatus so that the radiation is directed away from the person who uses the hand-held apparatus, whereas a further shielding effect is provided toward the person by metal parts and at least one printed circuit board.
- An apparatus according to claim 1, characterized in that the antenna having omnidirectional radiation characteristic is a telescoping antenna (14), and that the antenna having directional radiation characteristic is a patch antenna (9).
- An apparatus according to claim 2, characterized in that the telescoping antenna (14) is adapted to be connected only when it is extended fully or partly.
- An apparatus according to claim 2, characterized in that it comprises means (17) for connecting and disconnecting the telescoping antenna (14) in response to a received signal.
- An apparatus according to claim 4, characterized in that it comprises means (18) which measures the field strength of a signal received on the patch antenna (9), and that it comprises means (17) which connects the telescoping antenna only when said field strength his below a specific value.
- A method for a hand-held apparatus (11) which comprises at least two transmitter antennas (9, 14) for emitting a radio signal, the first one (14) of the at least two transmitter antennas has an omnidirectional radiation characteristic, the second one (9) of the at least transmitter antennas has a directional characteristic, characterized in that a detection circuit (18) measures the field strength of a signal received by the antenna (9) with a directional characteristic and connects the antenna (14) with omnidirectional radiation characteristic only when the field strength is below a specific value.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK74296A DK176625B1 (en) | 1996-07-05 | 1996-07-05 | Handheld device with antenna means for transmitting a radio signal |
DK74296 | 1996-07-05 | ||
EP97929142A EP0916166B1 (en) | 1996-07-05 | 1997-07-04 | A handheld apparatus having antenna means for emitting a radio signalapparatus and holder |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97929142A Division EP0916166B1 (en) | 1996-07-05 | 1997-07-04 | A handheld apparatus having antenna means for emitting a radio signalapparatus and holder |
EP97929142.4 Division | 1998-01-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1006605A1 EP1006605A1 (en) | 2000-06-07 |
EP1006605B1 true EP1006605B1 (en) | 2013-05-29 |
Family
ID=8097018
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99124721A Withdrawn EP1006606A1 (en) | 1996-07-05 | 1997-07-04 | A holder and a method for transferring signals between apparatus and holder |
EP99124720.6A Expired - Lifetime EP1006605B1 (en) | 1996-07-05 | 1997-07-04 | Hand-held apparatus |
EP97929142A Expired - Lifetime EP0916166B1 (en) | 1996-07-05 | 1997-07-04 | A handheld apparatus having antenna means for emitting a radio signalapparatus and holder |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99124721A Withdrawn EP1006606A1 (en) | 1996-07-05 | 1997-07-04 | A holder and a method for transferring signals between apparatus and holder |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97929142A Expired - Lifetime EP0916166B1 (en) | 1996-07-05 | 1997-07-04 | A handheld apparatus having antenna means for emitting a radio signalapparatus and holder |
Country Status (5)
Country | Link |
---|---|
EP (3) | EP1006606A1 (en) |
AU (1) | AU3336397A (en) |
DE (1) | DE69713103T2 (en) |
DK (1) | DK176625B1 (en) |
WO (1) | WO1998001919A2 (en) |
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US8473017B2 (en) | 2005-10-14 | 2013-06-25 | Pulse Finland Oy | Adjustable antenna and methods |
US8564485B2 (en) | 2005-07-25 | 2013-10-22 | Pulse Finland Oy | Adjustable multiband antenna and methods |
US8618990B2 (en) | 2011-04-13 | 2013-12-31 | Pulse Finland Oy | Wideband antenna and methods |
US8629813B2 (en) | 2007-08-30 | 2014-01-14 | Pusle Finland Oy | Adjustable multi-band antenna and methods |
US8648752B2 (en) | 2011-02-11 | 2014-02-11 | Pulse Finland Oy | Chassis-excited antenna apparatus and methods |
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- 1997-07-04 WO PCT/DK1997/000295 patent/WO1998001919A2/en active IP Right Grant
- 1997-07-04 EP EP99124721A patent/EP1006606A1/en not_active Withdrawn
- 1997-07-04 EP EP99124720.6A patent/EP1006605B1/en not_active Expired - Lifetime
- 1997-07-04 EP EP97929142A patent/EP0916166B1/en not_active Expired - Lifetime
- 1997-07-04 DE DE69713103T patent/DE69713103T2/en not_active Expired - Lifetime
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US9450291B2 (en) | 2011-07-25 | 2016-09-20 | Pulse Finland Oy | Multiband slot loop antenna apparatus and methods |
Also Published As
Publication number | Publication date |
---|---|
DE69713103T2 (en) | 2003-02-27 |
DE69713103D1 (en) | 2002-07-11 |
WO1998001919A2 (en) | 1998-01-15 |
DK74296A (en) | 1998-01-06 |
EP0916166B1 (en) | 2002-06-05 |
AU3336397A (en) | 1998-02-02 |
EP1006605A1 (en) | 2000-06-07 |
DK176625B1 (en) | 2008-12-01 |
WO1998001919A3 (en) | 1998-03-05 |
EP0916166A2 (en) | 1999-05-19 |
EP1006606A1 (en) | 2000-06-07 |
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