WO2011026522A1 - Dispositif d'antenne et dispositif portable de radiocommunication comprenant un tel dispositif d'antenne - Google Patents

Dispositif d'antenne et dispositif portable de radiocommunication comprenant un tel dispositif d'antenne Download PDF

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Publication number
WO2011026522A1
WO2011026522A1 PCT/EP2009/061460 EP2009061460W WO2011026522A1 WO 2011026522 A1 WO2011026522 A1 WO 2011026522A1 EP 2009061460 W EP2009061460 W EP 2009061460W WO 2011026522 A1 WO2011026522 A1 WO 2011026522A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency band
filtering means
antenna device
low noise
noise amplifier
Prior art date
Application number
PCT/EP2009/061460
Other languages
English (en)
Inventor
Andrei Kaikkonen
Peter Lindberg
Stefan Irmscher
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 PCT/EP2009/061460 priority Critical patent/WO2011026522A1/fr
Priority to CN2009801611368A priority patent/CN102484490A/zh
Publication of WO2011026522A1 publication Critical patent/WO2011026522A1/fr

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Classifications

    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3805—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving with built-in auxiliary receivers

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.
  • Internal antennas have been used for some time in portable radio communication devices. There are a number of advantages connected with using internal antennas, of which can be mentioned that they are small and light, making them suitable for applications wherein size and weight are of importance, such as in mobile phones, PDA, portable computer or similar devices .
  • the application of internal antennas in a mobile phone puts some constraints on the configuration of the antenna element.
  • the space for an internal antenna device is limited. These constraints may make it difficult to find a configuration of the antenna device that provides for desired use. This is especially true for antennas intended for use with radio signals of relatively low frequencies as the desired physical length of such antennas are large compared to antennas operating with relatively high frequencies.
  • One specific application operating in a relatively low frequency band is the FM radio application.
  • the FM operating band is defined as frequencies between 88- 108 MHz in most of the world and frequencies between 76-90 MHz in Japan.
  • Prior art conventional antenna configurations such as loop antennas or monopole antennas, fitted within the casing of a portable radio communication device will result in unsatisfactory operation in that the antenna either has too bad performance over a sufficiently wide frequency band or sufficient performance over a too narrow 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 portable radio communication device is today many times provided with frequency operational coverage for other frequency bands then FM, such as GSM900, GSM1800, GPS , Bluetooth, WLAN, WCDMA, LTE and GPS.
  • FM such as GSM900, GSM1800, GPS , Bluetooth, WLAN, WCDMA, LTE and GPS.
  • a portable radio communication device has limited space and it is thus desirable to, if possible, add multiple functionality to an antenna device.
  • the power consumption of the portable radio communication device is increased, and it is generally highly desirable to keep the power consumption of the portable radio communication device as low as possible .
  • An object of the present invention is to provide an antenna device for a portable radio communication device adapted for operation at least at a first and a second frequency band, wherein power consumption is limited.
  • This object is according to the present invention attained by an antenna device and a portable radio communication device, respectively, as defined by the appended claims.
  • an antenna device for a portable radio communication device adapted for simultaneous reception of a first frequency band and a second frequency band
  • the antenna device comprising radiating means and a low noise amplifier, wherein the radiating means is configured to exhibit high impedance for the first frequency band and to exhibit approximately 50 ⁇ impedance for the second frequency band, and the low noise amplifier is configured to exhibit high impedance for the first frequency band and to exhibit approximately 50 ⁇ impedance for the second frequency band
  • power consumption is limited due to utilization of one low noise amplifier for two separate frequency bands.
  • the first frequency band is preferably FM and the second frequency band is preferably GPS.
  • the first filtering means preferably comprises a series inductor, to provide blocking of the second frequency band.
  • the second filtering means preferably comprises a series capacitor, to provide blocking of the first frequency band.
  • the second filtering means is also configured to match the radiating means to 50 ⁇ impedance.
  • the antenna device preferably comprises a third branch for a third frequency band, which also is configured to match the radiating means to 50 ⁇ impedance.
  • FIG. 1 schematically illustrates a first embodiment of an antenna device according to the present invention.
  • FIG. 2 schematically illustrates a second embodiment of an antenna device of the present invention.
  • FIG. 3 schematically illustrates a third embodiment of an antenna device of the present invention.
  • FIG. 4 schematically illustrates a fourth embodiment of an antenna device of the present invention.
  • the antenna device is adapted for simultaneous reception of a first frequency band and a second frequency band, wherein the antenna device comprises radiating means 1, first filtering means 2 , second filtering means 3, third filtering means 4, fourth filtering means 5, and a low noise amplifier 6.
  • the first filtering means 2 is configured to pass operating frequencies of the first frequency band and to block operating frequencies of the second frequency band.
  • the second filtering means 3 is configured to pass operating frequencies of the second frequency band and to block operating frequencies of the first frequency band.
  • the third filtering means 4 is configured to band pass the second frequency band.
  • the fourth filtering means 5 is configured to pass operating frequencies of the second frequency band and to block operating frequencies of the first frequency band.
  • the low noise amplifier 6 is configured to exhibit high impedance for the first frequency band and to exhibit approximately 50 ⁇ impedance for the second frequency band. A generally accepted interval for a standard 50 ⁇ impedance is 25-100 ⁇ .
  • the radiating means 1 is connected to the first filtering means 2 and to the second filtering means 3 through a common feed point.
  • the first filtering means 2 is in turn connected to the low noise amplifier 6.
  • the second filtering means 3 is in turn connected to the third filtering means 4, which in turn is connected to the fourth filtering means 5, which in turn is connected to the low noise amplifier 6.
  • the low noise amplifier 6 is in turn connected to a first receiver 9 for the first frequency band and a second receiver 10 for the second frequency band.
  • the first frequency band is preferably for FM reception, and component values in this embodiment are based on that. However, the invention is also applicable on other similar frequency bands such as T- DMB and VHF.
  • the second frequency band is preferably for GPS reception, and component values in this embodiment are based on that.
  • the invention is also applicable on other similar frequency bands such as LTE, 700 MHz Rx MIMO, and WCDMA Rx diversity, 2110- 2170 MHz.
  • the first receiver 9 is advantageously provided with GPS blocking means, such as a series inductor of 91 nH. Alternatively, the first receiver 9 is e.g. provided with a series resonance circuit tuned to the FM frequency band.
  • the second receiver 10 is advantageously provided with FM blocking means, such as a series capacitor of 5 pF. Alternatively, the second receiver 10 is e.g. provided with a series resonance circuit tuned to the GPS frequency band.
  • the first filtering means 2 is preferably realized as a series inductor of 56 nH.
  • the first filtering means 2 also includes ESD protection, preferably realized as a series inductor of 91 nH and two parallel and oppositely directed grounded diodes. Since both the radiating means and the LNA exhibits high impedance for the first frequency band, losses in the 91 nH inductor are neglectable, and further the 91 nH inductor will not affect matching for the first frequency band.
  • the second filtering means 3 is preferably realized as a series capacitor of 1 pF.
  • the second filtering means also includes antenna matching for the second frequency band, preferably realized as an optional series inductor and a grounded inductor of 5 nH.
  • the third filtering means 4 is preferably realized as a GPS band pass filter, and advantageously also comprises ESD protection.
  • the fourth filtering means 5 is preferably realized as a series capacitor of 1 pF.
  • the fourth filtering means also includes LNA matching for the second frequency band, preferably realized as a series inductor of 15 nH and a grounded inductor of 20 nH.
  • the radiating means 1 is preferably realized as a radiating element having a feed point connected to the first filtering means 2 and to the second filtering means 3.
  • the radiating element is preferably a monopole along a short side of a mobile phone.
  • the monopole is preferably tuned by means of a grounded inductor, which will make the monopole exhibit high impedance for FM frequency band.
  • the second filtering means 3 is preferably configured to 50 ⁇ -match the radiating means 1 to the third filtering means 4, and the fourth filtering means 5 is preferably configured to 50 ⁇ -match the third filtering means 4 to the LNA 6.
  • a low noise amplifier exhibiting high impedance for a first frequency band, such as FM, and 50 ⁇ impedance for a second frequency band, such as GPS, is preferably realized by having a common source/emitter stage without shunt-shunt feedback, or a common drain/collector stage.
  • an impedance of at least 500 ⁇ is intended.
  • FIG. 2 A second embodiment of an antenna device according to the present invention is illustrated in Fig. 2.
  • the second embodiment of the antenna device is identical with the first embodiment of the antenna device described above apart from the following.
  • the radiating means 1 is realized as a radiating element having a first feed point connected to the first filtering means 2 and a second feed point connected to the second filtering means 3.
  • FIG. 3 A third embodiment of an antenna device according to the present invention is illustrated in Fig. 3.
  • the third embodiment of the antenna device is identical with the first embodiment of the antenna device described above apart from the following.
  • the radiating means is realized as a first radiating element 1 connected to the first filtering means 2 and a separate second radiating element 20 connected to the second filtering means 3. With two separate radiating elements 1 and 20, the FM blocking function of the second filtering means 3 can be omitted.
  • FIG. 4 A fourth embodiment of an antenna device according to the present invention is illustrated in Fig. 4.
  • the fourth embodiment of the antenna device is identical with the first embodiment of the antenna device described above apart from the following.
  • the antenna device further comprises fifth filtering means 22 , sixth filtering means 23 , and seventh filtering means 24 .
  • the fifth filtering means 22 is configured to pass operating frequencies of the third frequency band and to block operating frequencies of the first and second frequency bands.
  • the sixth filtering means 23 is configured to band pass the third frequency band.
  • the seventh filtering means 24 is configured to pass operating frequencies of the third frequency band and to block operating frequencies of the first and second frequency bands.
  • the low noise amplifier 6 is configured to exhibit approximately 50 ⁇ impedance also for the third frequency band.
  • the radiating means 1 is also connected to the fifth filtering means 22 .
  • the fifth filtering means 22 is in turn connected to the sixth filtering means 23 , which in turn is connected to the seventh filtering means 24 , which in turn is connected to the low noise amplifier 6 .
  • the low noise amplifier 6 is in turn also connected to a third receiver 26 , for reception of the third frequency band.
  • the third receiver 26 is advantageously provided with a series resonance circuit 25 tuned to the third frequency band.
  • the third frequency band is preferably for LTE Rx diversity reception, and component values in this embodiment are based on that.
  • the fifth filtering means 22 is preferably realized as a series capacitor of 2 pF.
  • the second filtering means also includes antenna matching for the third frequency band, preferably realized as a series inductor of 36 nH and a grounded inductor of 13 nH.
  • the sixth filtering means 23 is preferably realized as an LTE band pass filter, and advantageously also comprises ESD protection.
  • the seventh filtering means 24 is preferably realized as a series capacitor of 2 pF.
  • the seventh filtering means also includes LNA matching for the third frequency band and blocking of the second frequency band, preferably realized as a series inductor of 51 nH and a grounded inductor of 20 nH.
  • the radiating means is preferably realized as a radiating element 1 having a feed point connected to the first filtering means 2, to the second filtering means 3 and to the fifth filtering means 22.
  • the radiating means is realized as a radiating element 1 having a first feed point connected to the first filtering means 2, a second feed point connected to the second filtering means 3 and a third feed point connected to the fifth filtering means 22, in line with the second embodiment of the present invention.
  • the radiating means is realized as a first radiating element 1 having a feed point connected to the first filtering means 2 , a separate second radiating element 20 having a feed point connected to the second filtering means 3 and a third separate radiating element 21 connected to the fifth filtering means 22 , in line with the third embodiment of the present invention.
  • the radiating means could be realized in combinations of the three different realizations disclosed above.
  • the fifth filtering means 22 is preferably configured to 50 ⁇ -match the radiating means 1 to the sixth filtering means 23
  • the seventh filtering means 24 is preferably configured to 50 ⁇ -match the sixth filtering means 23 to the LNA 6 .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Details Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Transceivers (AREA)

Abstract

La présente invention porte sur un dispositif d'antenne pour dispositif de radiocommunication portable, apte à une réception simultanée d'une première bande de fréquence et d'une seconde bande de fréquence, le dispositif d'antenne comprenant des moyens de rayonnement et un amplificateur à faible bruit, le moyen de rayonnement étant configuré de façon à présenter une impédance élevée pour la première bande de fréquence et pour présenter approximativement une impédance de 50 Ω pour la seconde bande de fréquence, et l'amplificateur à faible bruit étant configuré de façon à présenter une impédance élevée pour la première bande de fréquence et pour présenter à une impédance d'approximativement 50 Ω pour la seconde bande de fréquence.
PCT/EP2009/061460 2009-09-04 2009-09-04 Dispositif d'antenne et dispositif portable de radiocommunication comprenant un tel dispositif d'antenne WO2011026522A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2009/061460 WO2011026522A1 (fr) 2009-09-04 2009-09-04 Dispositif d'antenne et dispositif portable de radiocommunication comprenant un tel dispositif d'antenne
CN2009801611368A CN102484490A (zh) 2009-09-04 2009-09-04 天线装置和包括该天线装置的便携式无线通信装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2009/061460 WO2011026522A1 (fr) 2009-09-04 2009-09-04 Dispositif d'antenne et dispositif portable de radiocommunication comprenant un tel dispositif d'antenne

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Publication Number Publication Date
WO2011026522A1 true WO2011026522A1 (fr) 2011-03-10

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CN (1) CN102484490A (fr)
WO (1) WO2011026522A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2658134A1 (fr) * 2012-04-26 2013-10-30 Harman Becker Automotive Systems GmbH Système d'antennes multiples
EP2741422A1 (fr) * 2012-12-05 2014-06-11 Nxp B.V. Émetteur-récepteur multibande concurrent
US8831547B2 (en) 2012-04-26 2014-09-09 Harman Becker Automotive Systems Gmbh Multi-antenna system
US9106314B2 (en) 2012-12-05 2015-08-11 Nxp B.V. Concurrent multiband transceiver
US9147937B2 (en) 2012-07-27 2015-09-29 Harman Becker Automotive Systems Gmbh Multiple-antenna system
EP3588559A1 (fr) * 2018-06-29 2020-01-01 Intel IP Corporation Circuit de protection contre les décharges électrostatiques pour des interfaces multibandes à large plage de fréquences

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040209583A1 (en) * 2003-04-17 2004-10-21 Tim Forrester Systems and methods for reusing a low noise amplifyer in a wireless communications device
US20070207751A1 (en) * 2006-03-03 2007-09-06 Broadcom Corporation Radio receiver with shared low noise amplifier for multi-standard operation in a single antenna system
US20090195477A1 (en) * 2006-09-15 2009-08-06 Laird Technologies, Inc. Stacked patch antennas

Family Cites Families (4)

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KR20030002452A (ko) * 2001-06-29 2003-01-09 엘지전자 주식회사 이동통신 단말기의 3 밴드 수신주파수 회로
KR20040092218A (ko) * 2003-04-25 2004-11-03 엘지전자 주식회사 이동 통신 단말기의 지피에스 및 시디엠에이 신호분리수신장치
EP1965502B1 (fr) * 2007-02-28 2010-11-24 Laird Technologies AB Dispositif d'antenne et dispositif de communication radio portable comportant un tel dispositif d'antenne
EP2056395A1 (fr) * 2007-11-05 2009-05-06 Laird Technologies AB Dispositif d'antenne et dispositif de communication radio portable comportant un tel dispositif d'antenne

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040209583A1 (en) * 2003-04-17 2004-10-21 Tim Forrester Systems and methods for reusing a low noise amplifyer in a wireless communications device
US20070207751A1 (en) * 2006-03-03 2007-09-06 Broadcom Corporation Radio receiver with shared low noise amplifier for multi-standard operation in a single antenna system
US20090195477A1 (en) * 2006-09-15 2009-08-06 Laird Technologies, Inc. Stacked patch antennas

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2658134A1 (fr) * 2012-04-26 2013-10-30 Harman Becker Automotive Systems GmbH Système d'antennes multiples
US8831547B2 (en) 2012-04-26 2014-09-09 Harman Becker Automotive Systems Gmbh Multi-antenna system
US8843096B2 (en) 2012-04-26 2014-09-23 Harman Becker Automotive Systems Gmbh Multi-antenna system
US9147937B2 (en) 2012-07-27 2015-09-29 Harman Becker Automotive Systems Gmbh Multiple-antenna system
EP2741422A1 (fr) * 2012-12-05 2014-06-11 Nxp B.V. Émetteur-récepteur multibande concurrent
CN103856234A (zh) * 2012-12-05 2014-06-11 Nxp股份有限公司 并发多频带收发器
US9106314B2 (en) 2012-12-05 2015-08-11 Nxp B.V. Concurrent multiband transceiver
US9329259B2 (en) 2012-12-05 2016-05-03 Nxp B.V. Concurrent multiband transceiver
EP3588559A1 (fr) * 2018-06-29 2020-01-01 Intel IP Corporation Circuit de protection contre les décharges électrostatiques pour des interfaces multibandes à large plage de fréquences
US11355924B2 (en) 2018-06-29 2022-06-07 Intel Corporation Circuit for electrostatic discharge protection for wide frequency range multi-band interfaces

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Publication number Publication date
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