EP2141770A1 - Dispositif d'antenne et dispositif de communication radio portable comportant un tel dispositif d'antenne - Google Patents

Dispositif d'antenne et dispositif de communication radio portable comportant un tel dispositif d'antenne Download PDF

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Publication number
EP2141770A1
EP2141770A1 EP08159354A EP08159354A EP2141770A1 EP 2141770 A1 EP2141770 A1 EP 2141770A1 EP 08159354 A EP08159354 A EP 08159354A EP 08159354 A EP08159354 A EP 08159354A EP 2141770 A1 EP2141770 A1 EP 2141770A1
Authority
EP
European Patent Office
Prior art keywords
frequencies
antenna device
radiating element
dvb
radio communication
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.)
Withdrawn
Application number
EP08159354A
Other languages
German (de)
English (en)
Inventor
Axel Von Arbin
Christian Braun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Laird Technologies AB
Original Assignee
Laird Technologies AB
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 Laird Technologies AB filed Critical Laird Technologies AB
Priority to EP08159354A priority Critical patent/EP2141770A1/fr
Priority to PCT/SE2009/050825 priority patent/WO2010002342A1/fr
Publication of EP2141770A1 publication Critical patent/EP2141770A1/fr
Withdrawn legal-status Critical Current

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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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the 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
    • H01Q1/24—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/328—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors between a radiating element and ground
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/35—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using two or more simultaneously fed points

Definitions

  • the present invention relates generally to antenna devices and more particularly to an antenna device for use in a portable radio communication device, such as a mobile phone, which antenna device is adapted for receiving radio signals having a relatively low frequency, such as radio signals in the FM frequency band.
  • a conventional FM antenna for portable radio communication devices is usually provided in the headset wire connected to the communication device.
  • This configuration with a relatively long wire permits an antenna length that is sufficient also for low frequency applications.
  • this solution is obviously not feasible.
  • a known active FM rx antenna device for a mobile phone is illustrated in Fig. 1 .
  • a FM receiver 1 is connected to one end of a half-loop radiating element 2, which radiating element is short-circuited in the other end to reduce the size of the antenna device.
  • An object of the present invention is to provide an antenna device for use in a portable radio communication device, which efficiently utilizes available space of the portable radio communication device and provides for at least FM frequency band operation.
  • the antenna device preferably comprises a switching arrangement at said first end and the filter device is arranged at the second end, wherein the switching arrangement is configured to switch between FM operation and DVB-H operation.
  • the antenna device comprises a switching arrangement at the second end and the filter device is arranged at the first end, wherein the switching arrangement is configured to switch between operation at frequencies at least ten times higher than FM frequencies and DVB-H operation.
  • the half-loop radiating element of the antenna device is preferably arranged over a ground plane device of a portable radio communication device, to provide a desired virtual loop.
  • radiating element is used. It is to be understood that this term is intended to cover electrically conductive elements arranged for receiving and/or transmitting radio signals.
  • the antenna device comprises a half-loop radiating element 2, having a first end and a second end, configured for receiving FM frequencies.
  • a half-loop antenna is a virtual loop antenna, by being provided over a ground plane device.
  • the antenna device further comprises a capacitor 4 at the first end for fine tuning or setting the half-loop radiating element 2 to e.g. either Japan or other country FM receiving frequencies and an inductor 5 at the second end to short-circuit the half-loop radiating element 2 for FM receiving frequencies.
  • the antenna device is further configured to simultaneously with FM frequencies operate at DVB-H frequencies.
  • the antenna device further comprises a filter device 6 at the first end of the half-loop radiating element 2, which filter device 6 is configured to block DVB-H frequencies.
  • a FM receiver 1 connected to the first end of the half-loop radiating element 2 experiences a short-circuited half-loop antenna device configured for FM frequencies
  • a DVB-H receiver 8 connected to the second end of the half-loop radiating element 2 experiences an open-ended half-loop antenna device configured for DVB-H frequencies.
  • the capacitor 4 is configured fine tune the half-loop radiating element 2 for FM frequencies.
  • a capacitance of about 30 pF is appropriate to fine tune the half-loop radiating element 2 for FM frequencies.
  • the filter device 6 is configured to block DVB-H frequencies.
  • the filter device is e.g. made up by a capacitor in parallel with an inductor.
  • a capacitance of about 6 pF and an inductance of about 11 nH is appropriate to provide a block for DVB-H frequencies, at the same time allowing FM frequencies to pass through.
  • a portable radio communication device 10 comprising an antenna device as described above comprises a ground plane device below the half-loop radiating element 2 to provide a virtual loop antenna device.
  • the ground plane device is e.g. provided as a printed wiring board of the portable radio communication device 10.
  • the portable radio communication device 10 is further provided with a matching network or matching filter for the FM receiver 1, and a matching network or matching filter for the DVB-H receiver 8.
  • the matching network or matching filter for the FM receiver 1 is connected to the first end of the half-loop radiating element 2.
  • the matching network or matching filter for the DVB-H receiver 8 is connected to the second end of the half-loop radiating element 2.
  • the antenna device comprises a half-loop radiating element 2, having a first end and a second end, configured for receiving FM frequencies.
  • the antenna device further comprises a capacitor 4 at the first end for fine tuning the half-loop radiating element 2 to FM receiving frequencies and an inductor 5 at the second end to short-circuit the half-loop radiating element 2 for FM receiving frequencies.
  • the antenna device is further configured to operate at DVB-H frequencies and at frequencies at least ten times higher than FM frequencies, such as at least one of GPS, Bluetooth, WLAN and WCDMA diversity.
  • the antenna device is arranged to operate with FM frequencies, DVB-H frequencies and Bluetooth frequencies, which all provide much desired functions.
  • the capacitor 4 is configured to also short circuit the half-loop radiating element 2 to ground for frequencies at least ten times higher than FM frequencies.
  • a capacitance of about 30 pF is appropriate to provide a short circuit for frequencies at least ten times higher than FM frequencies and to simultaneously tune the half-loop radiating element 2 for FM frequencies.
  • the inductor 5 is configured to short circuit the half-loop radiating element 2 to ground for FM frequencies.
  • An inductance of about 5 nH is appropriate to provide a short circuit for FM frequencies, at the same time preventing short circuit for frequencies at least ten times higher than FM frequencies.
  • the inductor 5 is further preferably used for tuning of the half-loop radiating element 2 for frequencies at least ten times higher than FM frequencies.
  • the filter device 6 is configured to block DVB-H frequencies.
  • the filter device is e.g. made up by a capacitor in parallel with an inductor.
  • a capacitance of about 6 pF and an inductance of about 11 nH is appropriate to provide a block for DVB-H frequencies, at the same time allowing FM frequencies as well as frequencies at least ten times FM frequencies to pass through.
  • the antenna device further comprises a filter device 6 at the second end of the half-loop radiating element 2, which filter device 6 is configured to block only DVB-H frequencies.
  • the antenna device also comprises a switching arrangement 7 at the first end, wherein the switching arrangement is configured to switch between FM operation and DVB-H operation.
  • a FM receiver 1 switchable to the first end of the half-loop radiating element 2 experiences a short-circuited half-loop antenna device configured for FM frequencies
  • a DVB-H receiver 8 switchable to the first end of the half-loop radiating element 2 experiences an open-ended half-loop antenna device configured for DVB-H frequencies
  • a BT transceiver 3 connected to the second end experiences a short-circuited half-loop antenna device configured for BT frequencies.
  • Tuning of the DVB-H receiver 8 is e.g. performed by a tuning device connected thereto, which tuning device has tuning properties corresponding to that of a Peregrine DTC device, modified with a lower cap.
  • a portable radio communication device 10 comprising an antenna device as described above comprises a ground plane device below the half-loop radiating element 2 to provide a virtual loop antenna.
  • the ground plane device is e.g. provided as a printed wiring board of the portable radio communication device.
  • the portable radio communication device 10 is further provided with a matching network or matching filter for a FM receiver 1, a matching network or matching filter for e.g. a Bluetooth transceiver 3, and a matching network or matching filter for a DVB-H receiver 8.
  • the matching network or matching filter for the FM receiver 1 is connected to the first end of the half-loop radiating element 2 via the switching arrangement 7.
  • the matching network or matching filter for the Bluetooth transceiver 3 is connected to the second end of the half-loop radiating element 2.
  • the matching network or matching filter for the DVB-H receiver 8 is connected to the first end of the half-loop radiating element 2 via the switching arrangement 7.
  • a third embodiment of an antenna device according to the present invention is schematically shown in Figs. 5 and 6 .
  • This third embodiment of the antenna device is identical with the second embodiment of the antenna device described above apart from the following.
  • the antenna device may further be adapted for also transmitting radio signals for FM frequencies.
  • the portable radio communication device comprises in such a case comprises a FM transmitter switchable to the first end of the half-loop radiating element 2.
  • the matching networks or matching filters for the FM transmitter and FM receiver are preferably a common matching network or matching filter for the FM receiver and the FM transmitter. Since the FM receiver and FM transmitter will not operate simultaneously, a switching arrangement is needed at the first end of the half-loop radiating element, which advantageously in the embodiment of Fig. 4 is a three state switch, since FM and DVB-H will not operate simultaneously in this embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Transceivers (AREA)
EP08159354A 2008-06-30 2008-06-30 Dispositif d'antenne et dispositif de communication radio portable comportant un tel dispositif d'antenne Withdrawn EP2141770A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08159354A EP2141770A1 (fr) 2008-06-30 2008-06-30 Dispositif d'antenne et dispositif de communication radio portable comportant un tel dispositif d'antenne
PCT/SE2009/050825 WO2010002342A1 (fr) 2008-06-30 2009-06-29 Antenne et dispositif de radiocommunication portatif comportant une telle antenne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08159354A EP2141770A1 (fr) 2008-06-30 2008-06-30 Dispositif d'antenne et dispositif de communication radio portable comportant un tel dispositif d'antenne

Publications (1)

Publication Number Publication Date
EP2141770A1 true EP2141770A1 (fr) 2010-01-06

Family

ID=40032654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08159354A Withdrawn EP2141770A1 (fr) 2008-06-30 2008-06-30 Dispositif d'antenne et dispositif de communication radio portable comportant un tel dispositif d'antenne

Country Status (2)

Country Link
EP (1) EP2141770A1 (fr)
WO (1) WO2010002342A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011131247A1 (fr) * 2010-04-23 2011-10-27 Laird Technologies Ab Dispositif d'antenne et dispositif électronique portatif comprenant un tel dispositif d'antenne
GB2501487A (en) * 2012-04-24 2013-10-30 Renesas Mobile Corp Multiple frequency antenna involving filter and impedance matching arrangements
US9781496B2 (en) 2012-10-25 2017-10-03 Milwaukee Electric Tool Corporation Worksite audio device with wireless interface
US10476284B2 (en) 2011-12-30 2019-11-12 Makita Corporation Battery system for a power tool, as well as battery holder therefor, charger, and charging system
WO2019243499A1 (fr) * 2018-06-20 2019-12-26 Advanced Pcb Antennas Sweden Ab Antenne multibande et multiport
EP2940787B1 (fr) * 2012-12-21 2020-06-17 Murata Manufacturing Co., Ltd. Dispositif d'antenne et appareil électronique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2361584A (en) * 2000-04-19 2001-10-24 Motorola Israel Ltd Multi-band antenna and switch system
WO2002049151A1 (fr) * 2000-12-16 2002-06-20 Koninklijke Philips Electronics N.V. Ensemble d'antenne
EP1335449A1 (fr) * 2000-10-31 2003-08-13 Mitsubishi Denki Kabushiki Kaisha Dispositif d'antenne et machine portable
US20080018541A1 (en) * 2006-07-24 2008-01-24 Nokia Corporation Cover antennas
US20080111748A1 (en) * 2006-11-10 2008-05-15 Dunn Doug L Antenna system having plural selectable antenna feed points and method of operation thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4814776A (en) * 1987-09-10 1989-03-21 Motorola, Inc. Optimally grounded small loop antenna
US5113196A (en) * 1989-01-13 1992-05-12 Motorola, Inc. Loop antenna with transmission line feed
KR100263181B1 (ko) * 1998-02-27 2000-08-01 윤종용 휴대용 무선 단말기 안테나

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2361584A (en) * 2000-04-19 2001-10-24 Motorola Israel Ltd Multi-band antenna and switch system
EP1335449A1 (fr) * 2000-10-31 2003-08-13 Mitsubishi Denki Kabushiki Kaisha Dispositif d'antenne et machine portable
WO2002049151A1 (fr) * 2000-12-16 2002-06-20 Koninklijke Philips Electronics N.V. Ensemble d'antenne
US20080018541A1 (en) * 2006-07-24 2008-01-24 Nokia Corporation Cover antennas
US20080111748A1 (en) * 2006-11-10 2008-05-15 Dunn Doug L Antenna system having plural selectable antenna feed points and method of operation thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011131247A1 (fr) * 2010-04-23 2011-10-27 Laird Technologies Ab Dispositif d'antenne et dispositif électronique portatif comprenant un tel dispositif d'antenne
US10476284B2 (en) 2011-12-30 2019-11-12 Makita Corporation Battery system for a power tool, as well as battery holder therefor, charger, and charging system
GB2501487A (en) * 2012-04-24 2013-10-30 Renesas Mobile Corp Multiple frequency antenna involving filter and impedance matching arrangements
US9781496B2 (en) 2012-10-25 2017-10-03 Milwaukee Electric Tool Corporation Worksite audio device with wireless interface
EP2940787B1 (fr) * 2012-12-21 2020-06-17 Murata Manufacturing Co., Ltd. Dispositif d'antenne et appareil électronique
WO2019243499A1 (fr) * 2018-06-20 2019-12-26 Advanced Pcb Antennas Sweden Ab Antenne multibande et multiport
SE544778C2 (en) * 2018-06-20 2022-11-15 Advanced Pcb Antennas Sweden Ab A multiband and multiport antenna

Also Published As

Publication number Publication date
WO2010002342A1 (fr) 2010-01-07

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