EP1641077A1 - Appareil de télécommunications et son antenne - Google Patents

Appareil de télécommunications et son antenne Download PDF

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Publication number
EP1641077A1
EP1641077A1 EP20050019902 EP05019902A EP1641077A1 EP 1641077 A1 EP1641077 A1 EP 1641077A1 EP 20050019902 EP20050019902 EP 20050019902 EP 05019902 A EP05019902 A EP 05019902A EP 1641077 A1 EP1641077 A1 EP 1641077A1
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EP
European Patent Office
Prior art keywords
ground
free end
plane radiation
radiation member
connecting portion
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.)
Granted
Application number
EP20050019902
Other languages
German (de)
English (en)
Other versions
EP1641077B1 (fr
Inventor
Ming-Feng Chen
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.)
Asustek Computer Inc
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Asustek Computer Inc
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Filing date
Publication date
Application filed by Asustek Computer Inc filed Critical Asustek Computer Inc
Publication of EP1641077A1 publication Critical patent/EP1641077A1/fr
Application granted granted Critical
Publication of EP1641077B1 publication Critical patent/EP1641077B1/fr
Active legal-status Critical Current
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • 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
    • 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
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • 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

Definitions

  • the invention relates to a planar antenna, and in particular to a mobile telecommunication device with a built-in planar antenna providing multiple frequency bands.
  • An antenna is indispensable part of a mobile telecommunication device.
  • a planar inverted-F antenna (PIFA) is commonly built into a mobile telecommunication device.
  • PIFA planar inverted-F antennas
  • EGSM 880 MHz - 960 MHz
  • DCS 1710 MHz - 1880 MHZ
  • PCS (1850 MHZ - 1990 MHz
  • a dual-frequency planar inverted-F antenna is disclosed by Liu (IEEE transaction on Antennas and Propagation, Vol. 45, pages 1451-1458, Oct. 10, 1997).
  • a dual-band planar inverted-F patch antenna with a branch-line slit is disclosed by Hsiao (Microwave and Optical Technology Letters, Vol. 32, pages 310-312, Feb. 4, 2002).
  • a dual-frequency PIFA with a rolled radiating arm for GSM-DCS operation is further disclosed by Hsiao (IEEE Antennas and Propagation Society International Symposium, pages 103-106, 2003).
  • a PIFA with dual-resonant modes is disclosed by Chen in 2002.
  • the resonant points of the PIFA are at 900MHz and 1900MHz covering frequency bands of DCS and PCS.
  • the PIFA can thus be used in triple-band (GSM/DCS/PCS) operation (Compact PIFA for GSM-DCS-PCS triple-band mobile phone, IEEE Antennas and Propagation Society International Symposium, pages 528-531, 2002).
  • GSM/DCS/PCS triple-band
  • PIFA planar inverted-F antennas
  • an exemplary embodiment of the invention provides a planar antenna comprising a ground area, a first plane radiation member, a second plane radiation member, and a third plane radiation member.
  • the first plane radiation member opposes the ground area and provides a first resonant frequency.
  • the first plane radiation member comprises a first ground end, a feeding end, and an intermediate portion disposed between the first ground end and the feeding end.
  • the first ground end is connected to the ground area, and the feeding end inputs signals.
  • the second plane radiation member opposes the ground area and comprises a connecting portion and a first free end.
  • the connecting portion is connected to the intermediate portion.
  • the first free end extends to one side of the first plane radiation member and is separated from the first ground end and feeding end by a first gap.
  • the feeding end, intermediate portion, connecting portion and first free end constitute a radiation path providing a second resonant frequency.
  • the third plane radiation member opposes the ground area and provides a third resonant frequency differing from the first and second resonant frequencies.
  • the third plane radiation member comprises a second ground end and a third free end.
  • the second ground end is connected to the ground area.
  • the third free end surrounds the first and second plane radiation members and is separated from the first and second plane radiation members by a third gap.
  • a mobile telecommunication device comprising a housing, an antenna base, and a planar antenna.
  • the housing comprises an upper case and a back cover.
  • the antenna base is disposed between the upper case and the back cover and comprises a back surface, a front surface, and a ground area.
  • the back surface faces the back cover, and the front surface faces the upper case.
  • the planar antenna is disposed on the ground area and comprises a first plane radiation member, a second plane radiation member, and a third plane radiation member to emit electromagnetic waves.
  • the second plane radiation member further comprises a second free end diverging from the first free end to the connecting portion and separated from the connecting portion by a second gap.
  • the first plane radiation member, connecting portion and first free end constitute an enclosed area, and the second free end diverging from the first free end extends into the enclosed area.
  • the first plane radiation member is ⁇ -shaped, and the first ground end and feeding end are respectively on both sides of the intermediate portion.
  • One side of the first plane radiation member, the connecting portion and first free end constitute an enclosed area, and the second free end diverging from the first free end extends into the enclosed area.
  • the first ground end is disposed between the feeding end and the second free end.
  • the second free end extending toward the connecting portion is separated from the connecting portion by a second gap.
  • the first, second and third plane radiation members are on the same plane.
  • the third resonant frequency exceeds the first resonant frequency, and the first resonant frequency exceeds the second resonant frequency.
  • the first resonant frequency is between 1710 MHz and 1880 MHz
  • the second resonant frequency is between 880 MHz and 960 MHz
  • the third resonant frequency is between 1850 MHz and 1990 MHz.
  • the planar antenna 100 comprises a ground area 10, a first plane radiation member 20, a second plane radiation member 30, and a third plane radiation member 40.
  • the first plane radiation member 20, second plane radiation member 30, and third plane radiation member 40 are on the same plane. To simplify the drawings, only a part of the ground area 10 is shown in FIG. 1.
  • the first plane radiation member 20 opposes the ground area 10 and is separated therefrom by a predetermined distance.
  • the first plane radiation member 20 is ⁇ -shaped and provides a first resonant frequency.
  • the first plane radiation member 20 comprises a first ground end 22, a feeding end 24, and an intermediate portion 21.
  • the intermediate portion 21 is disposed between the first ground end 22 and the feeding end 24, or the first ground end 22 and feeding end 24 are respectively disposed on both sides of the intermediate portion 21.
  • the first ground end 22 is connected to a ground point g 1 of the ground area 10 via a first ground conducting element 23.
  • the feeding end 24 is connected to a feeding conducting element 25.
  • the feeding conducting element 25 passes through a through hole a 1 of the ground area 10 and is connected to a feeding point f, to input signals.
  • the second plane radiation member 30 opposes the ground area 10 and is separated therefrom by a predetermined distance.
  • the second plane radiation member 30 comprises a connecting portion 32, a first free end 34, and a second free end 36.
  • the feeding end 24 and intermediate portion 21 of the first plane radiation member 20 and the connecting portion 32 and first free end 34 of the second plane radiation member 30 constitute a radiation path providing a second resonant frequency.
  • the second resonant frequency is less than the first resonant frequency.
  • the connecting portion 32 of the second plane radiation member 30 is connected to the intermediate portion 21 of the first plane radiation member 20.
  • the first free end 34 extends to one side of the first plane radiation member 20 and is separated from the first ground end 22 and feeding end 24 by a first gap d 1 .
  • the first ground end 22 of the first plane radiation member 20 and the connecting portion 32 and first free end 34 of the second plane radiation member 30 constitute an enclosed area 50.
  • the second free end 36 of the second plane radiation member 30 diverges from the first free end 34, extends into the enclosed area 50, and is parallel to the first ground end 22 and feeding end 24. Accordingly, the first ground end 22 is between the feeding end 24 and the second free end 36. Additionally, the front of second free end 36 is separated from the connecting portion 32 by a second gap d 2 .
  • the third plane radiation member 40 opposes the ground area 10 and is separated therefrom by a predetermined distance.
  • the third plane radiation member 40 provides a third resonant frequency differing from the first and second resonant frequencies.
  • the third plane radiation member 40 comprises a second ground end 42 and a third free end 44.
  • the second ground end 42 is connected to a ground point g 2 of the ground area 10 via a second ground conducting element 43.
  • the third free end 44 surrounds the first plane radiation member 20 and second plane radiation member 30 and is separated therefrom by a third gap d 3 .
  • the third plane radiation member 40 provides a parasitic path and thereby serves as a resonator.
  • the bandwidth of the first plane radiation member 20 is thus enlarged. Accordingly, the third resonant frequency can be greater or less than the first resonant frequency.
  • the length of the first, second, and third plane radiation members may approximately be one-fourth of the wavelength at the corresponding resonant point.
  • the first resonant frequency is between 1710 MHz and 1880 MHz (DCS 1800).
  • the second resonant frequency is between 880 MHz and 960 MHz (EGSM 800).
  • the second resonant frequency is between 880 MHz and 960 MHz (PCS 1900).
  • the planar antenna 100 can be applied to conventional mobile telecommunication systems providing multi-band operation.
  • FIG. 2 is a schematic view of the mobile telecommunication device 200 of the invention.
  • the mobile telecommunication device 200 can be, for example, a cellular phone.
  • the mobile telecommunication device 200 comprises a housing 110, an antenna base 120, and a planar antenna 100.
  • the housing 110 comprises an upper case 111 and a back cover 112.
  • the antenna base 120 is disposed between the upper case 111 and the back cover 112 and comprises a back surface 124, a front surface 122, and a ground area 10.
  • the back surface 124 faces the back cover 112, and the front surface 122 faces the upper case 111.
  • the ground area 10 is also disposed in the planar antenna 100.
  • the first plane radiation member 20, second plane radiation member 30, and third plane radiation member 40 of the planar antenna 100 is capable of emitting electromagnetic waves of different frequency bands.
  • the first plane radiation member 20 and second plane radiation member 30 constitute a structure with two opposing inverted-F elements.
  • the first ground end 22 is separated from the feeding end 24 by a fourth gap d 4 .
  • the second free end 36 is separated from the first ground end 22 by a fifth gap d 5 .
  • the second free end 36 is separated from an intermediate section between the connecting portion 32 and the first free end 34 by a sixth gap d 6 .
  • the planar antenna 100 is applied to different cellular phones, the resonant frequencies and gain distribution of the planar antenna 100 deviate due to different antenna bases, ground areas, and housings.
  • the width of the fourth gap d 4 (conduction area between the first ground end 22 and the feeding end 24) can be adjusted to alter the point and bandwidth of the first resonant frequency, or the position of the second free end 36 in the enclosed area 50 (widths of the fifth gap d 5 and sixth gap d 6 ) can be adjusted to alter the point and bandwidth of the second resonant frequency.
  • the third plane radiation member 40 of the planar antenna 100 serves as a resonator.
  • the bandwidth of the first resonant frequency can be adjusted by adjusting the width of the third plane radiation member 40 or third gap d 3 .
  • the planar antenna 100 can cover three frequency bands of EGSM, GSM 1800, and . GSM 1900, enabling triple-band transmission.
  • the sizes and widths of the first plane radiation member 20, second plane radiation member 30, and third plane radiation member 40 and gaps therebetween can be adequately adjusted such that the planar antenna 100 can provide other frequency bands and be applied to other telecommunication devices providing dual-band operation, such as IEEE 802.11.b and 802.11.a.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Waveguide Aerials (AREA)
  • Support Of Aerials (AREA)
EP05019902.5A 2004-09-22 2005-09-13 Appareil de télécommunications et son antenne Active EP1641077B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2004100826357A CN100544117C (zh) 2004-09-22 2004-09-22 移动通讯装置及其平面天线结构

Publications (2)

Publication Number Publication Date
EP1641077A1 true EP1641077A1 (fr) 2006-03-29
EP1641077B1 EP1641077B1 (fr) 2015-08-19

Family

ID=35033648

Family Applications (1)

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EP05019902.5A Active EP1641077B1 (fr) 2004-09-22 2005-09-13 Appareil de télécommunications et son antenne

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EP (1) EP1641077B1 (fr)
CN (1) CN100544117C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008001167A1 (fr) * 2006-06-27 2008-01-03 Nokia Corporation Système d'antenne compacte, multibande et multimode
WO2009091323A1 (fr) * 2008-01-18 2009-07-23 Laird Technologies Ab Dispositif d'antenne et dispositif de radiocommunication portable comprenant ce dispositif d'antenne
WO2012160413A1 (fr) * 2011-05-23 2012-11-29 Nokia Corporation Appareils et procédés pour communication sans fil
US8994596B2 (en) 2011-08-04 2015-03-31 Arcadyan Technology Corporation Multi-band antenna

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101335375B (zh) * 2007-06-26 2013-01-16 启碁科技股份有限公司 三频天线及其应用的电子装置
CN101442150B (zh) * 2007-11-23 2013-06-26 宏达国际电子股份有限公司 适用于薄型通讯装置的天线
CN101651256B (zh) * 2008-08-13 2013-08-07 深圳富泰宏精密工业有限公司 三频天线
CN102800924A (zh) * 2011-05-27 2012-11-28 神讯电脑(昆山)有限公司 三频天线
CN102810722A (zh) * 2011-06-03 2012-12-05 启碁科技股份有限公司 宽频带天线
US10826182B2 (en) 2016-10-12 2020-11-03 Carrier Corporation Through-hole inverted sheet metal antenna

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6343208B1 (en) * 1998-12-16 2002-01-29 Telefonaktiebolaget Lm Ericsson (Publ) Printed multi-band patch antenna
WO2002078123A1 (fr) * 2001-03-23 2002-10-03 Telefonaktiebolaget L M Ericsson (Publ) Systeme multi-bande, multi-antenne integre
WO2002078124A1 (fr) * 2001-03-22 2002-10-03 Telefonaktiebolaget L M Ericsson (Publ) Dispositif de communication mobile
US6476769B1 (en) * 2001-09-19 2002-11-05 Nokia Corporation Internal multi-band antenna
EP1263079A1 (fr) * 2001-05-25 2002-12-04 Nokia Corporation Antenne pour téléphone mobile
WO2005043674A1 (fr) * 2003-10-31 2005-05-12 Lk Products Oy Antenne planaire multibande

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6343208B1 (en) * 1998-12-16 2002-01-29 Telefonaktiebolaget Lm Ericsson (Publ) Printed multi-band patch antenna
WO2002078124A1 (fr) * 2001-03-22 2002-10-03 Telefonaktiebolaget L M Ericsson (Publ) Dispositif de communication mobile
WO2002078123A1 (fr) * 2001-03-23 2002-10-03 Telefonaktiebolaget L M Ericsson (Publ) Systeme multi-bande, multi-antenne integre
EP1263079A1 (fr) * 2001-05-25 2002-12-04 Nokia Corporation Antenne pour téléphone mobile
US6476769B1 (en) * 2001-09-19 2002-11-05 Nokia Corporation Internal multi-band antenna
WO2005043674A1 (fr) * 2003-10-31 2005-05-12 Lk Products Oy Antenne planaire multibande

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008001167A1 (fr) * 2006-06-27 2008-01-03 Nokia Corporation Système d'antenne compacte, multibande et multimode
KR101054713B1 (ko) 2006-06-27 2011-08-05 노키아 코포레이션 다중대역 다중모드 콤팩트 안테나 시스템
WO2009091323A1 (fr) * 2008-01-18 2009-07-23 Laird Technologies Ab Dispositif d'antenne et dispositif de radiocommunication portable comprenant ce dispositif d'antenne
WO2012160413A1 (fr) * 2011-05-23 2012-11-29 Nokia Corporation Appareils et procédés pour communication sans fil
US9673525B2 (en) 2011-05-23 2017-06-06 Nokia Technologies Oy Apparatus and methods for wireless communication
US8994596B2 (en) 2011-08-04 2015-03-31 Arcadyan Technology Corporation Multi-band antenna

Also Published As

Publication number Publication date
EP1641077B1 (fr) 2015-08-19
CN1753248A (zh) 2006-03-29
CN100544117C (zh) 2009-09-23

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