WO2008103102A1 - Antenne à bandes multiples pour un dispositif de communication radio portable - Google Patents

Antenne à bandes multiples pour un dispositif de communication radio portable Download PDF

Info

Publication number
WO2008103102A1
WO2008103102A1 PCT/SE2008/000131 SE2008000131W WO2008103102A1 WO 2008103102 A1 WO2008103102 A1 WO 2008103102A1 SE 2008000131 W SE2008000131 W SE 2008000131W WO 2008103102 A1 WO2008103102 A1 WO 2008103102A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna element
parasitic
band
main
switching means
Prior art date
Application number
PCT/SE2008/000131
Other languages
English (en)
Inventor
Christian Braun
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
Publication of WO2008103102A1 publication Critical patent/WO2008103102A1/fr

Links

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.
  • Fig. 1 schematically shows a main antenna element and a parasitic antenna element positioned adjacent each other according to a first embodiment of the present invention
  • Fig. 2 schematically shows a switching means connected to a parasitic antenna element according to the first embodiment of the present invention
  • Fig. 3 is a return loss chart for a multi-band antenna according to the first embodiment of the present invention.
  • Fig. 4 schematically shows a multi-band antenna according to the present invention in a portable radio communication device
  • Fig. 5 schematically shows a switching means connected to a parasitic antenna element according to a second embodiment of the present invention.
  • 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 Ua above a first main resonance center frequency- la 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 lib 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)

Abstract

La présente invention porte sur une antenne à bandes multiples agencée pour fournir une bande haute fréquence élevée et une bande basse fréquence pour un dispositif de communication radio portable, l'antenne à bandes multiples comprenant un élément d'antenne principal (1) et un élément d'antenne parasite (2), l'élément d'antenne principal (1) étant agencé pour fournir une résonance dans la bande haute fréquence et la bande basse fréquence, l'antenne à bandes multiples comprenant des moyens de commutation commandables (9) agencés pour régler l'élément d'antenne parasite (2) à une première fréquence centrale de résonance parasitaire (IIA) au-dessus d'une première fréquence centrale de résonance principale (Ia) de l'élément d'antenne principal (1) dans un premier état des moyens de commutation (9) et pour régler l'élément d'antenne parasite (2) à une seconde fréquence centrale de résonance parasite (IIb) au-dessous d'une seconde fréquence centrale de résonance principale (Ib) dans un second état des moyens de commutation (9).
PCT/SE2008/000131 2007-02-20 2008-02-19 Antenne à bandes multiples pour un dispositif de communication radio portable WO2008103102A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07445005A EP1962375A1 (fr) 2007-02-20 2007-02-20 Antenne multibande pour dispositif portable de communications radio
EP07445005.7 2007-02-20

Publications (1)

Publication Number Publication Date
WO2008103102A1 true WO2008103102A1 (fr) 2008-08-28

Family

ID=38179502

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2008/000131 WO2008103102A1 (fr) 2007-02-20 2008-02-19 Antenne à bandes multiples pour un dispositif de communication radio portable

Country Status (2)

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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100295743A1 (en) * 2009-05-20 2010-11-25 Ta-Chun Pu Antenna Structure With Reconfigurable Pattern And Manufacturing Method Thereof
US20140368392A1 (en) * 2012-01-11 2014-12-18 Adant Technologies, Inc. Reconfigurable antenna structure
CN112350049A (zh) * 2019-08-09 2021-02-09 青岛海信移动通信技术股份有限公司 一种移动终端
US11424541B2 (en) 2016-12-12 2022-08-23 Skyworks Solutions, Inc. Frequency and polarization reconfigurable antenna systems
US11735815B2 (en) 2019-05-01 2023-08-22 Skyworks Solutions, Inc. Reconfigurable antenna systems integrated with metal case
US11973283B2 (en) 2017-05-18 2024-04-30 Skyworks Solutions, Inc. Reconfigurable antenna systems with ground tuning pads

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8604980B2 (en) 2009-12-22 2013-12-10 Motorola Mobility Llc Antenna system with non-resonating structure
KR101357724B1 (ko) * 2011-12-29 2014-02-03 주식회사 바켄 다중 대역 안테나 장치
EP2816665B1 (fr) * 2013-06-20 2021-06-02 BlackBerry Limited Antenne accordable en fréquence
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
GB2571279B (en) 2018-02-21 2022-03-09 Pet Tech Limited Antenna arrangement and associated method
IT202000008101A1 (it) 2020-04-16 2021-10-16 Calearo Antenne S P A Con Socio Unico Dispositivo di antenna

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002078124A1 (fr) * 2001-03-22 2002-10-03 Telefonaktiebolaget L M Ericsson (Publ) Dispositif de communication mobile
EP1432072A1 (fr) * 2002-12-16 2004-06-23 Filtronic LK Oy Antenne pour un dispositif radio plat

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI115574B (fi) * 2003-04-15 2005-05-31 Filtronic Lk Oy Säädettävä monikaista-antenni
US7301502B2 (en) * 2005-08-18 2007-11-27 Nokia Corporation Antenna arrangement for a cellular communication terminal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002078124A1 (fr) * 2001-03-22 2002-10-03 Telefonaktiebolaget L M Ericsson (Publ) Dispositif de communication mobile
EP1432072A1 (fr) * 2002-12-16 2004-06-23 Filtronic LK Oy Antenne pour un dispositif radio plat

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100295743A1 (en) * 2009-05-20 2010-11-25 Ta-Chun Pu Antenna Structure With Reconfigurable Pattern And Manufacturing Method Thereof
US20140368392A1 (en) * 2012-01-11 2014-12-18 Adant Technologies, Inc. Reconfigurable antenna structure
US9774082B2 (en) * 2012-01-11 2017-09-26 Adant Technologies, Inc. Reconfigurable antenna structure
US11424541B2 (en) 2016-12-12 2022-08-23 Skyworks Solutions, Inc. Frequency and polarization reconfigurable antenna systems
US11973283B2 (en) 2017-05-18 2024-04-30 Skyworks Solutions, Inc. Reconfigurable antenna systems with ground tuning pads
US11735815B2 (en) 2019-05-01 2023-08-22 Skyworks Solutions, Inc. Reconfigurable antenna systems integrated with metal case
CN112350049A (zh) * 2019-08-09 2021-02-09 青岛海信移动通信技术股份有限公司 一种移动终端

Also Published As

Publication number Publication date
EP1962375A1 (fr) 2008-08-27

Similar Documents

Publication Publication Date Title
EP1962375A1 (fr) Antenne multibande pour dispositif portable de communications radio
US8674889B2 (en) Tunable antenna arrangement
US7482991B2 (en) Multi-band compact PIFA antenna with meandered slot(s)
EP3073566B1 (fr) Dispositif mobile et son procédé de fabrication
JP4875166B2 (ja) ２つの素子が共通フィードを共有することを可能にする装置
US8330665B2 (en) Antenna device and portable radio communication device comprising such antenna device
EP2645479B1 (fr) Dispositif de communication et élément d'antenne reconfigurable
EP2704253A1 (fr) Dispositif mobile et structure d'antenne correspondante
US20100328164A1 (en) Switched antenna with an ultra wideband feed element
US9088067B2 (en) Communication device and tunable antenna element therein
US20140015719A1 (en) Switched antenna apparatus and methods
EP2301108B1 (fr) Arrangement d antenne
WO2006109184A1 (fr) Antenne dotee d'une pluralite de frequences de resonance
EP2491613B1 (fr) Antenne reconfigurable
US7808445B2 (en) Antenna device and portable radio communication device comprising such an antenna device
EP2141770A1 (fr) Dispositif d'antenne et dispositif de communication radio portable comportant un tel dispositif d'antenne
US20140354497A1 (en) Antenna structure and wireless communication device using the same
KR101482604B1 (ko) 광대역화 정합 모듈 및 이를 포함하는 통신 장치
RU2438232C2 (ru) Устройство для обеспечения использования общего фидера двумя элементами
WO2011150970A1 (fr) Agencement de commutation pour dispositif d'antenne

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08724096

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08724096

Country of ref document: EP

Kind code of ref document: A1