EP1962375A1 - Mehrband-Antenne für ein tragbares Funkkommunikationsgerät - Google Patents

Mehrband-Antenne für ein tragbares Funkkommunikationsgerät Download PDF

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Publication number
EP1962375A1
EP1962375A1 EP07445005A EP07445005A EP1962375A1 EP 1962375 A1 EP1962375 A1 EP 1962375A1 EP 07445005 A EP07445005 A EP 07445005A EP 07445005 A EP07445005 A EP 07445005A EP 1962375 A1 EP1962375 A1 EP 1962375A1
Authority
EP
European Patent Office
Prior art keywords
antenna element
parasitic
band
main
switching means
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.)
Ceased
Application number
EP07445005A
Other languages
English (en)
French (fr)
Inventor
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 EP07445005A priority Critical patent/EP1962375A1/de
Priority to PCT/SE2008/000131 priority patent/WO2008103102A1/en
Publication of EP1962375A1 publication Critical patent/EP1962375A1/de
Ceased legal-status Critical Current

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Classifications

    • 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
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/005—Patch antenna using one or more coplanar parasitic 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
    • H01Q5/378—Combination of fed elements with parasitic elements
    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means

Definitions

  • the present invention relates generally to antennas, and particularly to a multi-band antenna for a portable radio communication device.
  • An object of the present invention is to provide an antenna for a portable radio communication device that provides broad frequency band coverage.
  • a multi-band antenna comprising a main antenna element, a parasitic antenna element and controllable switching means, which parasitic antenna element is arranged to provide resonance above and below a main antenna element resonance with the controllable switching means changing tuning of the parasitic antenna element, provides broad frequency band coverage.
  • the main antenna element and the parasitic antenna element are off-ground antenna elements to be fitted in recent designs of portable radio communication devices.
  • the switching means comprises a switch connecting the parasitic antenna element to ground in a first state and the parasitic antenna element to open in a second state.
  • the switching means preferably comprises a switch connecting the parasitic antenna element to inducting means connected to ground in the first state and the parasitic antenna element to open in the second state.
  • the multi-band antenna preferably comprises inducting means between the parasitic antenna element and ground.
  • the inducting means comprises an inductor.
  • a multi-band antenna providing a high frequency band and a low frequency band for a portable radio communication device 12, such as a mobile phone, a PDA, a portable computer or similar devices, comprises a main antenna element 1 and a parasitic antenna element 2.
  • the high frequency band preferably covers GSM1800, GSM1900 and WCDMA2100, and the low frequency band preferably covers GSM850 and GSM900.
  • the main antenna element 1 is designed to provide resonance both in the high frequency band and the low frequency band of the multi-band antenna.
  • the main antenna element 1 preferably comprises an IFA type of radiator with a feeding 3 and grounding portion 4.
  • the main antenna element 1 e.g. comprises a monopole type of radiator with a feeding portion 3 and no grounding portion 4.
  • the main antenna element 1 is e.g. fed by RF circuits 7 and grounded through inducting means 8, such as an inductor 8.
  • the inductor can in some cases be omitted and replaced by a direct short-circuit to ground.
  • the parasitic antenna element 2 is designed to provide resonance in the high frequency band of the multi-band antenna, as desired coverage of such frequency band requires the broadest frequency band coverage.
  • the parasitic antenna element 2 is preferably a radiator with a grounding portion 5, 6.
  • the grounding portion 6 of the parasitic antenna element 2 is e.g. grounded through reactive means 10, such as inductive means 10, e.g. a discrete inductor or a transmission line, but could also be grounded through capacitive means or a combination thereof.
  • the grounding portion 5 of the parasitic antenna element 2 is e.g. connected to controllable switching means 9.
  • the controllable switching means 9 tunes the parasitic antenna element 2 to a first parasitic resonance center frequency IIa above a first main resonance center frequency Ia of the main antenna element 1 in a first state of the switching means 9, e.g. by connecting the grounding portion 5 to ground.
  • the controllable switching means 9 tunes the parasitic antenna element 2 to a second parasitic resonance center frequency IIb below a second main resonance center frequency Ib of the main antenna element 1 in a second state of the switching means 9, e.g. by connecting the grounding portion 5 to an open connection.
  • the controllable switching means 2 is preferably a switch, such as a SPDT (Single Pole, Double Throw) switch, but could be provided by other means.
  • the first and second main resonance center frequencies Ia and Ib are essentially the same resonance center frequency of the main antenna element 1 but it is slightly shifted with major tuning changes of the parasitic antenna element 2.
  • By switching the resonance center frequency of the parasitic antenna element 2 above and below of the resonance center frequency of the main antenna element 1 a very broad frequency band coverage is attained for the multi-band antenna with use of only little space of the portable radio communication device, thus allowing little clearance utilization for the multi-band antenna in the portable radio communication device.
  • clearance is meant the spacing between an end of the printed wiring board and the casing of the portable radio communication device.
  • the reactive means 10 is largely used to determine the amount of frequency switching of the parasitic radiator resonance between the switch states.
  • a multi-band antenna having a main antenna element 1 and a parasitic antenna element 2, which resonance center frequency of the parasitic antenna element 2 is switched above and below a resonance center frequency of the main antenna element 1, provides for small clearance in the portable radio communication device, which is particularly advantageous for off-ground antennas.
  • An off-ground antenna is positioned outside of a printed wiring board 11 in the portable radio communication device 12, such as a mobile phone, which is illustrated in Fig. 4 .
  • the switching means may be provided with more than two switching states, up to essentially continuous variation of tuning.
  • Essentially continuous variation of tuning may e.g. be provided by means of a variable capacitor.
  • the main antenna element may be provided with switching means and/or tuning means to adjust its different resonance center frequencies.
  • a second embodiment of the present invention is next described with reference to Fig. 5 .
  • This second embodiment is identical with the first embodiment described above apart from the following.
  • the switch 9 connects the parasitic antenna element 2 to open or to ground through inductive means, such as an inductor, to provide fine tuning for the grounded as well as open state of the switch.
  • the switch 9 connects the parasitic antenna element 2 to a first inductive means in the first state and a second inductive means in the second state, in which case the inductive means 10 could be omitted.
  • a third embodiment of the present invention will next be described.
  • This third embodiment is identical with the first embodiment described above apart from the following.
  • the parasitic resonance center frequency of the parasitic antenna element is in the first state of the switching means 9 tuned to the high frequency band of the multi-band antenna and in the second state of the switching means 9 tuned to the low frequency band of the multi-band antenna, or vice verse. This is e.g. achieved by use of a large inductance 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Support Of Aerials (AREA)
EP07445005A 2007-02-20 2007-02-20 Mehrband-Antenne für ein tragbares Funkkommunikationsgerät Ceased EP1962375A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07445005A EP1962375A1 (de) 2007-02-20 2007-02-20 Mehrband-Antenne für ein tragbares Funkkommunikationsgerät
PCT/SE2008/000131 WO2008103102A1 (en) 2007-02-20 2008-02-19 A multi-band antenna for a portable radio communication device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07445005A EP1962375A1 (de) 2007-02-20 2007-02-20 Mehrband-Antenne für ein tragbares Funkkommunikationsgerät

Publications (1)

Publication Number Publication Date
EP1962375A1 true EP1962375A1 (de) 2008-08-27

Family

ID=38179502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07445005A Ceased EP1962375A1 (de) 2007-02-20 2007-02-20 Mehrband-Antenne für ein tragbares Funkkommunikationsgerät

Country Status (2)

Country Link
EP (1) EP1962375A1 (de)
WO (1) WO2008103102A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011087751A2 (en) * 2009-12-22 2011-07-21 Motorola Mobility, Inc. Antenna system with non-resonating structure
WO2013100676A1 (ko) * 2011-12-29 2013-07-04 주식회사 바켄 다중 대역 안테나 장치
WO2013104656A1 (en) * 2012-01-11 2013-07-18 Adant Technologies, Inc. A reconfigurable antenna structure
EP2816665A1 (de) * 2013-06-20 2014-12-24 BlackBerry Limited Frequenzabstimmbare Antenne
US20140375515A1 (en) * 2013-06-20 2014-12-25 Blackberry Limited Frequency tunable antenna
US20150155634A1 (en) * 2013-06-20 2015-06-04 Sony Corporation Antenna arrangement and device
CN107706506A (zh) * 2017-11-15 2018-02-16 青岛海信移动通信技术股份有限公司 一种可重构天线及智能通信终端
US11336025B2 (en) 2018-02-21 2022-05-17 Pet Technology Limited Antenna arrangement and associated method
EP3896789B1 (de) 2020-04-16 2023-02-15 Calearo Antenne S.P.A. Con Socio Unico Antennenvorrichtung

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI423524B (zh) * 2009-05-20 2014-01-11 Ind Tech Res Inst 具切換不同輻射場形之特性的天線結構與製作方法
CN110178265A (zh) 2016-12-12 2019-08-27 天工方案公司 频率和极化可重构天线系统
US10965035B2 (en) 2017-05-18 2021-03-30 Skyworks Solutions, Inc. Reconfigurable antenna systems with ground tuning pads
US11158938B2 (en) 2019-05-01 2021-10-26 Skyworks Solutions, Inc. Reconfigurable antenna systems integrated with metal case
CN112350049B (zh) * 2019-08-09 2023-03-14 青岛海信移动通信技术股份有限公司 一种移动终端

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1469549A1 (de) * 2003-04-15 2004-10-20 Filtronic LK Oy Einstellbare mehrbandige PIFA-Antenne
US20040233109A1 (en) * 2001-03-22 2004-11-25 Zhinong Ying Mobile communication device
EP1755191A1 (de) * 2005-08-18 2007-02-21 Nokia Corporation Antennenvorrichtung für zellulares Kommunikationsendgerät

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI116332B (fi) * 2002-12-16 2005-10-31 Lk Products Oy Litteän radiolaitteen antenni

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040233109A1 (en) * 2001-03-22 2004-11-25 Zhinong Ying Mobile communication device
EP1469549A1 (de) * 2003-04-15 2004-10-20 Filtronic LK Oy Einstellbare mehrbandige PIFA-Antenne
EP1755191A1 (de) * 2005-08-18 2007-02-21 Nokia Corporation Antennenvorrichtung für zellulares Kommunikationsendgerät

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011087751A3 (en) * 2009-12-22 2014-02-27 Motorola Mobility, Inc. Antenna system with non-resonating structure
US8860614B2 (en) 2009-12-22 2014-10-14 Motorola Mobility Llc Portable electronic device having an antenna system with a non-resonating structure
WO2011087751A2 (en) * 2009-12-22 2011-07-21 Motorola Mobility, Inc. Antenna system with non-resonating structure
WO2013100676A1 (ko) * 2011-12-29 2013-07-04 주식회사 바켄 다중 대역 안테나 장치
KR101357724B1 (ko) * 2011-12-29 2014-02-03 주식회사 바켄 다중 대역 안테나 장치
US9774082B2 (en) 2012-01-11 2017-09-26 Adant Technologies, Inc. Reconfigurable antenna structure
WO2013104656A1 (en) * 2012-01-11 2013-07-18 Adant Technologies, Inc. A reconfigurable antenna structure
EP2816665A1 (de) * 2013-06-20 2014-12-24 BlackBerry Limited Frequenzabstimmbare Antenne
US20150155634A1 (en) * 2013-06-20 2015-06-04 Sony Corporation Antenna arrangement and device
US9548538B2 (en) * 2013-06-20 2017-01-17 Sony Corporation Antenna arrangement and device
US20140375515A1 (en) * 2013-06-20 2014-12-25 Blackberry Limited Frequency tunable antenna
CN107706506A (zh) * 2017-11-15 2018-02-16 青岛海信移动通信技术股份有限公司 一种可重构天线及智能通信终端
US11336025B2 (en) 2018-02-21 2022-05-17 Pet Technology Limited Antenna arrangement and associated method
EP3896789B1 (de) 2020-04-16 2023-02-15 Calearo Antenne S.P.A. Con Socio Unico Antennenvorrichtung

Also Published As

Publication number Publication date
WO2008103102A1 (en) 2008-08-28

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