EP1641077B1 - Appareil de télécommunications et son antenne - Google Patents

Appareil de télécommunications et son antenne Download PDF

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Publication number
EP1641077B1
EP1641077B1 EP05019902.5A EP05019902A EP1641077B1 EP 1641077 B1 EP1641077 B1 EP 1641077B1 EP 05019902 A EP05019902 A EP 05019902A EP 1641077 B1 EP1641077 B1 EP 1641077B1
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EP
European Patent Office
Prior art keywords
planar
ground
radiation member
free end
planar radiation
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Application number
EP05019902.5A
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German (de)
English (en)
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EP1641077A1 (fr
Inventor
Ming-Feng Chen
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Asustek Computer Inc
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Asustek Computer Inc
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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 planar antenna according to the preamble of claim 1 is disclosed in WO 02/078124 A . Similar antennas are described in EP 1 263 079 A1 , US 6 343 208 B1 , US 6 476 769 B1 , and WO 02/078123 A1 .
  • 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 planar radiation member, a second planar radiation member, and a third planar radiation member.
  • the first planar radiation member opposes the ground area and provides a first resonant frequency.
  • the first planar 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 planar 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 planar 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 planar radiation member opposes the ground area and provides a third resonant frequency differing from the first and second resonant frequencies.
  • the third planar 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 planar radiation members and is separated from the first and second planar 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 planar radiation member, a second planar radiation member, and a third planar radiation member to emit electromagnetic waves.
  • the first planar 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 planar radiation member is U-shaped, and the first ground end and feeding end are respectively on both sides of the intermediate portion.
  • One side of the first planar 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 planar 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 planar radiation member 20, a second planar radiation member 30, and a third planar radiation member 40.
  • the first planar radiation member 20, second planar radiation member 30, and third planar 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 planar radiation member 20 opposes the ground area 10 and is separated therefrom by a predetermined distance.
  • the first planar radiation member 20 is U-shaped and provides a first resonant frequency.
  • the first planar 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 al of the ground area 10 and is connected to a feeding point f, to input signals.
  • the second planar radiation member 30 opposes the ground area 10 and is separated therefrom by a predetermined distance.
  • the second planar 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 planar radiation member 20 and the connecting portion 32 and first free end 34 of the second planar 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 planar radiation member 30 is connected to the intermediate portion 21 of the first planar radiation member 20.
  • the first free end 34 extends to one side of the first planar radiation member 20 and is separated from the first ground end 22 and feeding end 24 by a first gap d1.
  • the first ground end 22 of the first planar radiation member 20 and the connecting portion 32 and first free end 34 of the second planar radiation member 30 constitute an enclosed area 50.
  • the second free end 36 of the second planar 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 d2.
  • the third planar radiation member 40 opposes the ground area 10 and is separated therefrom by a predetermined distance.
  • the third planar radiation member 40 provides a third resonant frequency differing from the first and second resonant frequencies.
  • the third planar 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 g2 of the ground area 10 via a second ground conducting element 43.
  • the third free end 44 surrounds the first planar radiation member 20 and second planar radiation member 30 and is separated therefrom by a third gap d3.
  • the third planar radiation member 40 provides a parasitic path and thereby serves as a resonator.
  • the bandwidth of the first planar 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 planar 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 planar radiation member 20, second planar radiation member 30, and third planar radiation member 40 of the planar antenna 100 is capable of emitting electromagnetic waves of different frequency bands.
  • the first planar radiation member 20 and second planar 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 d4.
  • the second free end 36 is separated from the first ground end 22 by a fifth gap d5.
  • 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 d6.
  • the width of the fourth gap d4 (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 d5 and sixth gap d6) can be adjusted to alter the point and bandwidth of the second resonant frequency.
  • the third planar 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 planar radiation member 40 or third gap d3.
  • 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 planar radiation member 20, second planar radiation member 30, and third planar 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.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Waveguide Aerials (AREA)
  • Support Of Aerials (AREA)

Claims (8)

  1. Antenne planaire (100), comprenant :
    une surface de masse (10) ;
    un premier élément de rayonnement planaire (20) opposé à la surface de masse et fournissant une première fréquence de résonance, où le premier élément de rayonnement planaire comprend une première extrémité de masse (22), une extrémité d'alimentation (24), et une partie intermédiaire (21) disposée entre la première extrémité de masse et l'extrémité d'alimentation, la première extrémité de masse (22) est raccordée à la surface de masse (10), et l'extrémité d'alimentation (24) fait entrer des signaux ;
    un deuxième élément de rayonnement planaire (30) opposé à la surface de masse (10) et comprenant une partie de raccordement (32) et une première extrémité libre (34), où la partie de raccordement est raccordée à la partie intermédiaire (21), la première extrémité libre (34) s'étend à un côté du premier élément de rayonnement planaire (20) et est séparée de la première extrémité de masse (22) et de l'extrémité d'alimentation (24) par un premier espace (d1), et l'extrémité d'alimentation (22), la partie intermédiaire (21), la partie de raccordement (32) et la première extrémité libre (34) constituent un trajet de rayonnement fournissant une deuxième fréquence de résonance ; et
    un troisième élément de rayonnement planaire (40) opposé à la surface de masse (10) et fournissant une troisième fréquence de résonance qui diffère des première et deuxième fréquences de résonance, où le troisième élément de rayonnement planaire comprend une deuxième extrémité de masse (42) et une troisième extrémité libre (44), la deuxième extrémité de masse est raccordée à la surface de masse (10), et la troisième extrémité libre est séparée des premier et deuxième éléments de rayonnement planaires (20 ; 30) par un troisième espace (d3);
    caractérisée en ce que le deuxième élément de rayonnement planaire (30) a une deuxième extrémité libre (36) qui diverge depuis la première extrémité libre (34) vers la partie de raccordement (32) et est séparée de la partie de raccordement par un deuxième espace (d2), et en ce que le troisième élément de rayonnement planaire (40) entoure les premier et deuxième éléments de rayonnement planaires (20, 30).
  2. Antenne planaire telle que revendiquée dans la revendication 1, dans laquelle le premier élément de rayonnement planaire (20), la partie de raccordement (32) et la première extrémité libre (34) constituent une zone fermée (50), et la deuxième extrémité libre (36) divergeant depuis la première extrémité libre (34) s'étend dans la zone fermée (50)
  3. Antenne planaire telle que revendiquée dans la revendication 1 ou 2, dans laquelle le premier élément de rayonnement planaire (20) a une forme en U, et la première extrémité de masse (22) et l'extrémité d'alimentation (24) sont respectivement disposées sur les deux côtés de la partie intermédiaire (21).
  4. Antenne planaire telle que revendiquée dans la revendication 1 ou 2, dans laquelle la première extrémité de masse (22) est disposée entre l'extrémité d'alimentation (24) et la deuxième extrémité libre (36).
  5. Antenne planaire telle que revendiquée dans la revendication 1 ou 2, dans laquelle les premier, deuxième et troisième éléments de rayonnement planaires (20, 30, 40) se trouvent sur le même plan.
  6. Antenne planaire telle que revendiquée dans la revendication 1 ou 2, dans laquelle la troisième fréquence de résonance est supérieure à la première fréquence de résonance, et la première fréquence de résonance est supérieure à la deuxième fréquence de résonance.
  7. Dispositif de télécommunication mobile, comprenant :
    un boîtier (110) comprenant un étui supérieur (111) et un couvercle arrière (112) ;
    une base d'antenne (120) disposée entre l'étui supérieur et le couvercle arrière et comprenant une surface arrière (124), et une surface avant (122), où la surface arrière fait face au couvercle arrière, et la surface avant fait face à l'étui supérieur ; et
    une antenne planaire selon l'une des revendications 1 à 6, dans laquelle la surface de masse (10) est formée sur la base d'antenne (120).
  8. Dispositif de télécommunication mobile tel que revendiqué dans la revendication 7, dans lequel la surface de masse (10) est disposée sur la surface avant (122).
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 EP1641077A1 (fr) 2006-03-29
EP1641077B1 true EP1641077B1 (fr) 2015-08-19

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CN (1) CN100544117C (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7298339B1 (en) * 2006-06-27 2007-11-20 Nokia Corporation Multiband multimode compact antenna system
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
EP2081253A1 (fr) * 2008-01-18 2009-07-22 Laird Technologies AB Dispositif d'antenne et dispositif de communication radio portable comportant un tel dispositif d'antenne
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
WO2012160413A1 (fr) * 2011-05-23 2012-11-29 Nokia Corporation Appareils et procédés pour communication sans fil
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
TWI542073B (zh) * 2011-08-04 2016-07-11 智易科技股份有限公司 多頻倒ｆ型天線
WO2018071388A1 (fr) 2016-10-12 2018-04-19 Carrier Corporation Antenne à feuille métallique inversée et trou traversant

Family Cites Families (6)

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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
KR20030085000A (ko) * 2001-03-22 2003-11-01 텔레폰악티에볼라겟엘엠에릭슨(펍) 이동 통신 장치
EP1378021A1 (fr) * 2001-03-23 2004-01-07 Telefonaktiebolaget LM Ericsson (publ) Systeme multi-bande, multi-antenne integre
EP1263079B1 (fr) * 2001-05-25 2004-07-14 Nokia Corporation Antenne pour téléphone mobile
US6476769B1 (en) * 2001-09-19 2002-11-05 Nokia Corporation Internal multi-band antenna
FI120607B (fi) * 2003-10-31 2009-12-15 Pulse Finland Oy Monikaistainen tasoantenni

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EP1641077A1 (fr) 2006-03-29
CN1753248A (zh) 2006-03-29
CN100544117C (zh) 2009-09-23

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