WO1999031757A1 - Antenne a double bande - Google Patents

Antenne a double bande Download PDF

Info

Publication number
WO1999031757A1
WO1999031757A1 PCT/SE1998/002235 SE9802235W WO9931757A1 WO 1999031757 A1 WO1999031757 A1 WO 1999031757A1 SE 9802235 W SE9802235 W SE 9802235W WO 9931757 A1 WO9931757 A1 WO 9931757A1
Authority
WO
WIPO (PCT)
Prior art keywords
patch
ground plane
plane layer
frequency band
microwave power
Prior art date
Application number
PCT/SE1998/002235
Other languages
English (en)
Inventor
Björn LINDMARK
Original Assignee
Allgon 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 Allgon Ab filed Critical Allgon Ab
Priority to EP98962782A priority Critical patent/EP1038332B1/fr
Priority to DE69839348T priority patent/DE69839348T2/de
Priority to AU17940/99A priority patent/AU1794099A/en
Priority to BRPI9813505-8A priority patent/BR9813505B1/pt
Publication of WO1999031757A1 publication Critical patent/WO1999031757A1/fr
Priority to HK01103784A priority patent/HK1033210A1/xx

Links

Classifications

    • 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
    • H01Q19/10—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 using reflecting surfaces
    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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
    • H01Q9/0414—Substantially flat resonant element parallel to ground plane, e.g. patch antenna in a stacked or folded configuration
    • 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
    • H01Q9/0428—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave
    • 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
    • H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
    • H01Q9/0457—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means electromagnetically coupled to the feed line

Definitions

  • the present invention relates to a dual band antenna, comprising at least one antenna element including a number of substantially planar, mutually parallel radiating patches being fed with microwave power from a feed network via a coupling means m a ground plane layer of an electrically conductive material .
  • the mam ob ect of the present invention is to provide such an antenna with an antenna element which is operable m at least two separate frequency bands, each band preferably being rather broad.
  • Another object is to provide an antenna with an antenna element operating with dual polarization m order to accomplish a desired diversity of the microwave radiation transmitted from or received by the antenna. Such diversity is especially useful for base station antennas.
  • the dual polarized carrier waves should be orthogonal to each other with a good isolation therebetween, preferably better than 30 dB.
  • the feed network is adapted to feed microwave power in at least two separate frequency bands, including a first, relatively low frequency band and a second, relatively high frequency band, a first one of said patches being adapted to radiate microwave power in said first frequency band and being provided with an aperture so as to couple microwave power in said second frequency band to a second one of said patches, the microwave power in said first frequency band being fed from said feed network via said coupling means at said ground plane layer to said first patch, and the microwave power in said second frequency band being fed from said feed network via said coupling means at said ground plane layer and via an aperture in said first patch to said second patch.
  • the first patch will have a dual operative function, i.e. it will serve as a radiating element but also as a coupling element so as to couple, by means of its aperture, the microwave power from the feed network and the aperture of the ground plane layer to the second patch.
  • the third patch between the ground plane layer and the first patch, the third patch serving to couple the microwave power in the second frequency band.
  • the third patch should be substantially of the same size as the second patch but smaller than the first patch.
  • the coupling means at the ground plane layer comprises an aperture therein, and each of the apertures is cross-shaped with two crossing slots being perpendicular to one another.
  • the first and second patches should then be centered in relation to the central point of the cross-shaped aperture of the ground plane layer.
  • Fig. 1 is a perspective, exploded view of an antenna element with a number of substantially planar patches located on top of a ground plane layer having a cross-shaped aperture, a feed network and a bottom or rear shielding cage;
  • Fig. 2 is a view from the bottom of the antenna element shown in fig. 1, the bottom shielding cage being removed for clarity.
  • Fig. 3 is a perspective view, corresponding to fig. 1, of a second embodiment of the antenna element.
  • the antenna element shown very schematically in fig. 1 compri- ses a patch structure with three substantially planar patch layers 1, 2 and 3 located one on top of the other and centered over a ground plane layer 4 serving as a reflector.
  • the ground plane layer 4 is made of an electrically conductive material, e.g. aluminum, and is provided with a centrally loca ⁇ ted cross-shaped aperture with two mutually perpendicular slots 5a, 5b.
  • the cross-shaped aperture 5a, 5b is excited by a mic- rostrip feed network 6 which is etched on a substrate layer 7 placed underneath the ground plane layer 4.
  • the shielding cage 8 serves to prevent microwave propagation backwards or sideways in parallel to the plane defined by the ground plane layer 4.
  • the shielding cage 8 is likewise made of an electrically conductive material, such as aluminum, and is preferably provided with upwardly projecting tongues os sharp pins 8a, which extend through correspon- ding holes in the substrate 7 and are connected to the ground plane layer 4, e.g. by soldered connections in corresponding bores in the ground plane layer 4 (not shown) .
  • the patches 1, 2 and 3 are separated from each other by a foam material (not shown), e.g. of the kind denoted ROHACELL, having a permittivity of approximately 1.05.
  • the substrate layer 7 is made of a teflon material, such as DICLAD 527, being 0.762 mm thich and having a permittivity of 2.55.
  • the feed network 6 is provided with forklike feed elements 6a, 6b which are perpendicular to each other and to a corresponding one of the slots 5a, 5b in the ground plane layer 4, the slots 5a, 5b serving as a coupling means for the microwave power. See also fig. 2.
  • the feed network 6 is adapted to feed microwave power in two separate frequency bands, including a first, relatively low frequency band, e.g. the 880- 960 MHz GSM band and a second, relatively high frequency band, e.g. the 1710-1880 MHz DCS frequency band.
  • a first, relatively low frequency band e.g. the 880- 960 MHz GSM band
  • a second, relatively high frequency band e.g. the 1710-1880 MHz DCS frequency band.
  • the feed elements 6a, 6b feed microwave power via the slots 5a, 5b (one vertically polarized channel and one horisontally polarized channel) to the relatively large radiating patch 2, which radiates microwave power in a well-defined pattern (upwardly in fig. 1) .
  • the feed elements 6a, 6b will also feed microwave power in the second, relatively high frequency band via the slots 5a, 5b in the ground plane layer 4 and via a cross-shaped aperture 9a, 9b in the patch layer 2 to the upper, relatively small radiating patch 1.
  • the cross-shaped aperture 9a, 9b consists of perpendicular slots 9a and 9b, which are parallel to a respective one of the slots 5a, 5b, though shorter in length.
  • the patch 3, located between the ground plane layer 4 and the patch 2 serves to enhance the coupling effect in the second, relatively high frequency band.
  • the patch 3 should be slightly larger than or substantially of the same size as the radiating patch 1 but smaller than the radiating patch 2.
  • the feed elements 6a and 6b are positioned in the same plane on the bottom of the substrate layer 7. Therefore, it is necessary to have an air bridge at the crossing point 6c of the two feed elements 6a, 6b.
  • Each feed element is divided into two 50 ⁇ branches which end in open circuit stubs. In both frequency bands, a small amount of symmetrical capacitive tuning is provided by way of short sec- tions 6aa, 6bb being somewhat wider about 30 mm before the respective aperture slot 5a, 5b.
  • the size and position of the relatively large radiating patch 2 are chosen for good performance in the lower frequency band, the length and width of the patch 2 corresponding essentially to the lengths of the slots 5a and 5b.
  • the patches 1, 2, 3 do not have to be square or rectangular but can have some other configuration, e.g. circular or rombic. In case dual polarization is used, they should be symmetrical with reference to a rotation of 90° or a multiple thereof.
  • the slots 9a, 9b in the radiating patch 2 should be shorter than the slots 5a, 5b.
  • the respective length of these slots 9a, 9b should correspond to the dimensions of the relatively small radiating patch 1.
  • the coupling patch 3 should be slightly larger than or substantially of the same size as the radiating patch 1.
  • the slots 9a, 9b may be rotated at an angle, e.g. 45°, relative to the longer slots 5a, 5b.
  • the relatively large radiating patch 2 functions as a ground plane for the relatively small top patch 1. This has been confirmed in practical experiments. In fact, it was found that the radiation patterns from the patches 1 and 2 were quite similar. Also, the ratio between the size of the patch 2 and the ground plane layer 4 is approximately equal to the ratio between the small patch 1 and the large patch 2.
  • the shielding cage or box 8 reduces the radiation backwards to practically zero.
  • this can be achieved by means of electrically conducting screws.
  • Fig. 3 shows a slightly different embodiment, where the feed network is constituted by coaxial cables 6' a and 6'b, one for each polarization. At the ground layer 4', these cables are connected to probes 5' a and 5'b, respectively. The central conductor of each cable 6' a, 6'b is thus connected to the respective probe 5' a, 5'b, which in turn is connected to the coupling patch 3', whereas the outer, tubular conductor of each coaxial cable is connected to the ground plane layer 4' . If so desired, there may be more than one pair of coaxial cables and probes. Also, in principle, it is possible to combine probe feeding and aperture-coupling, one for each polarization.
  • the antenna according to the invention may be modified within the scope of the appended claims.
  • the antenna may comprise two or several antenna elements in a row or in several rows in a matrix arrangement.
  • each antenna element may comprise more than two radiating patches, each radiating in a specific frequency band.
  • the frequency bands are widely separated from each other, typically by an octave between adja ⁇ cent frequency bands.
  • the dual polarization may be linear as shown, or circular.
  • the inventive concept may also be applied without dual polarization. In such a case, the apertures in the ground plane layer 4 and in the patch 2 do not have to be cross-shaped but may have any desired configuration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

L'invention concerne une antenne couplée par une ouverture et comprenant au moins un élément d'antenne présentant un certain nombre de plaques rayonnantes (1-3) sensiblement planes et parallèles mutuellement, alimentées en énergie hyperfréquence par un réseau d'alimentation (6) via une ouverture (5a, 5b) ménagée dans une couche (4) de plan de sol. Le réseau d'alimentation (6) fournit une énergie hyperfréquence dans au moins deux bandes de fréquences séparées comprenant une première bande de fréquences relativement basse et une seconde bande de fréquences relativement haute. Une première plaque (2) émet une énergie hyperfréquence dans ladite première bande de fréquences et présente une ouverture (9a, 9b) afin de coupler l'énergie hyperfréquence de la seconde bande de fréquences à une seconde plaque (1), l'énergie hyperfréquence de la seconde bande de fréquences provenant du réseau d'alimentation (6) via les ouvertures (5a, 5b; 9a, 9b) se trouvant dans ladite couche (4) du plan de sol, et ladite première plaque (2) à ladite seconde plaque (1).
PCT/SE1998/002235 1997-12-12 1998-12-07 Antenne a double bande WO1999031757A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP98962782A EP1038332B1 (fr) 1997-12-12 1998-12-07 Antenne a double bande
DE69839348T DE69839348T2 (de) 1997-12-12 1998-12-07 Zweibandantenne
AU17940/99A AU1794099A (en) 1997-12-12 1998-12-07 Dual band antenna
BRPI9813505-8A BR9813505B1 (pt) 1997-12-12 1998-12-07 antena de banda dual.
HK01103784A HK1033210A1 (en) 1997-12-12 2001-06-01 Dual band antenna.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9704642A SE511064C2 (sv) 1997-12-12 1997-12-12 Tvåbandsantenn
SE9704642-9 1997-12-12

Publications (1)

Publication Number Publication Date
WO1999031757A1 true WO1999031757A1 (fr) 1999-06-24

Family

ID=20409368

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/002235 WO1999031757A1 (fr) 1997-12-12 1998-12-07 Antenne a double bande

Country Status (10)

Country Link
EP (1) EP1038332B1 (fr)
CN (1) CN1147966C (fr)
AU (1) AU1794099A (fr)
BR (1) BR9813505B1 (fr)
DE (1) DE69839348T2 (fr)
ES (1) ES2301218T3 (fr)
HK (1) HK1033210A1 (fr)
SE (1) SE511064C2 (fr)
TW (1) TW413967B (fr)
WO (1) WO1999031757A1 (fr)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6208299B1 (en) 1999-03-15 2001-03-27 Allgon Ab Dual band antenna arrangement
ES2156832A1 (es) * 1999-10-07 2001-07-16 Univ Valencia Politecnica Antena impresa de banda dual
US6339404B1 (en) 1999-08-13 2002-01-15 Rangestar Wirless, Inc. Diversity antenna system for lan communication system
WO2002043183A1 (fr) * 2000-11-27 2002-05-30 Allgon Ab Antenne hyperfrequence a dispositif de montage de piece
FR2828015A1 (fr) * 2001-07-27 2003-01-31 D Phy Espace Dev De Produits H Circuit d'alimentation et antenne le comportant
WO2003052868A1 (fr) * 2001-12-19 2003-06-26 Raysat Cyprus Limited Element d'antenne
EP1976061A1 (fr) * 2007-03-28 2008-10-01 M/A-Com, Inc. Antenne planaire compacte pour une ou plusieurs configurations de polarisation
DE102008059268A1 (de) 2008-11-27 2009-11-19 Kathrein-Werke Kg Einrichtung zur Lageerkennung einer Antennenanordnung
US7705793B2 (en) 2004-06-10 2010-04-27 Raysat Antenna Systems Applications for low profile two way satellite antenna system
KR100988909B1 (ko) * 2008-09-23 2010-10-20 한국전자통신연구원 고이득 및 광대역 특성을 갖는 마이크로스트립 패치 안테나
US7911400B2 (en) 2004-01-07 2011-03-22 Raysat Antenna Systems, L.L.C. Applications for low profile two-way satellite antenna system
US8120536B2 (en) 2008-04-11 2012-02-21 Powerwave Technologies Sweden Ab Antenna isolation
KR101111668B1 (ko) * 2010-08-27 2012-03-13 한국전자통신연구원 고이득 및 광대역 특성을 갖는 마이크로스트립 패치 안테나
US8354972B2 (en) 2007-06-06 2013-01-15 Fractus, S.A. Dual-polarized radiating element, dual-band dual-polarized antenna assembly and dual-polarized antenna array
US8761663B2 (en) 2004-01-07 2014-06-24 Gilat Satellite Networks, Ltd Antenna system
US8896493B2 (en) 1999-10-26 2014-11-25 Fractus, S.A. Interlaced multiband antenna arrays
US8941541B2 (en) 1999-09-20 2015-01-27 Fractus, S.A. Multilevel antennae
WO2016131496A1 (fr) * 2015-02-20 2016-08-25 Huawei Technologies Co., Ltd. Élément d'antenne à ports multiples

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102570019B (zh) * 2012-01-17 2014-12-17 上海大亚科技有限公司 支持双频的贴片射频天线单元及相应的射频天线系统
CN102842755B (zh) * 2012-07-11 2015-07-22 桂林电子科技大学 适用于无线局域网的双极化天线及其制作方法
CN105406190B (zh) * 2014-08-06 2018-03-30 启碁科技股份有限公司 平板双极化天线及复合天线
KR102332120B1 (ko) * 2017-04-25 2021-11-30 삼성전자주식회사 메타 구조 안테나 및 메타 구조 배열
US10931014B2 (en) 2018-08-29 2021-02-23 Samsung Electronics Co., Ltd. High gain and large bandwidth antenna incorporating a built-in differential feeding scheme

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5030961A (en) * 1990-04-10 1991-07-09 Ford Aerospace Corporation Microstrip antenna with bent feed board
EP0520908A1 (fr) * 1991-06-28 1992-12-30 Alcatel Espace Antenne réseau linéaire
US5241321A (en) * 1992-05-15 1993-08-31 Space Systems/Loral, Inc. Dual frequency circularly polarized microwave antenna
US5355143A (en) * 1991-03-06 1994-10-11 Huber & Suhner Ag, Kabel-, Kautschuk-, Kunststoffwerke Enhanced performance aperture-coupled planar antenna array
US5448250A (en) * 1992-09-28 1995-09-05 Pilkington Plc Laminar microstrip patch antenna

Family Cites Families (2)

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US4903033A (en) * 1988-04-01 1990-02-20 Ford Aerospace Corporation Planar dual polarization antenna
US5124713A (en) * 1990-09-18 1992-06-23 Mayes Paul E Planar microwave antenna for producing circular polarization from a patch radiator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5030961A (en) * 1990-04-10 1991-07-09 Ford Aerospace Corporation Microstrip antenna with bent feed board
US5355143A (en) * 1991-03-06 1994-10-11 Huber & Suhner Ag, Kabel-, Kautschuk-, Kunststoffwerke Enhanced performance aperture-coupled planar antenna array
EP0520908A1 (fr) * 1991-06-28 1992-12-30 Alcatel Espace Antenne réseau linéaire
US5241321A (en) * 1992-05-15 1993-08-31 Space Systems/Loral, Inc. Dual frequency circularly polarized microwave antenna
US5448250A (en) * 1992-09-28 1995-09-05 Pilkington Plc Laminar microstrip patch antenna

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6208299B1 (en) 1999-03-15 2001-03-27 Allgon Ab Dual band antenna arrangement
US6339404B1 (en) 1999-08-13 2002-01-15 Rangestar Wirless, Inc. Diversity antenna system for lan communication system
US9240632B2 (en) 1999-09-20 2016-01-19 Fractus, S.A. Multilevel antennae
US8941541B2 (en) 1999-09-20 2015-01-27 Fractus, S.A. Multilevel antennae
US8976069B2 (en) 1999-09-20 2015-03-10 Fractus, S.A. Multilevel antennae
US10056682B2 (en) 1999-09-20 2018-08-21 Fractus, S.A. Multilevel antennae
US9000985B2 (en) 1999-09-20 2015-04-07 Fractus, S.A. Multilevel antennae
US9054421B2 (en) 1999-09-20 2015-06-09 Fractus, S.A. Multilevel antennae
US9761934B2 (en) 1999-09-20 2017-09-12 Fractus, S.A. Multilevel antennae
US9362617B2 (en) 1999-09-20 2016-06-07 Fractus, S.A. Multilevel antennae
ES2156832A1 (es) * 1999-10-07 2001-07-16 Univ Valencia Politecnica Antena impresa de banda dual
US9905940B2 (en) 1999-10-26 2018-02-27 Fractus, S.A. Interlaced multiband antenna arrays
US8896493B2 (en) 1999-10-26 2014-11-25 Fractus, S.A. Interlaced multiband antenna arrays
US6831608B2 (en) 2000-11-27 2004-12-14 Allgon Ab Microwave antenna with patch mounting device
WO2002043183A1 (fr) * 2000-11-27 2002-05-30 Allgon Ab Antenne hyperfrequence a dispositif de montage de piece
FR2828015A1 (fr) * 2001-07-27 2003-01-31 D Phy Espace Dev De Produits H Circuit d'alimentation et antenne le comportant
US6995712B2 (en) 2001-12-19 2006-02-07 Victor Boyanov Antenna element
WO2003052868A1 (fr) * 2001-12-19 2003-06-26 Raysat Cyprus Limited Element d'antenne
US8761663B2 (en) 2004-01-07 2014-06-24 Gilat Satellite Networks, Ltd Antenna system
US7911400B2 (en) 2004-01-07 2011-03-22 Raysat Antenna Systems, L.L.C. Applications for low profile two-way satellite antenna system
US7705793B2 (en) 2004-06-10 2010-04-27 Raysat Antenna Systems Applications for low profile two way satellite antenna system
US7626549B2 (en) 2007-03-28 2009-12-01 Eswarappa Channabasappa Compact planar antenna for single and multiple polarization configurations
EP1976061A1 (fr) * 2007-03-28 2008-10-01 M/A-Com, Inc. Antenne planaire compacte pour une ou plusieurs configurations de polarisation
US8354972B2 (en) 2007-06-06 2013-01-15 Fractus, S.A. Dual-polarized radiating element, dual-band dual-polarized antenna assembly and dual-polarized antenna array
US8120536B2 (en) 2008-04-11 2012-02-21 Powerwave Technologies Sweden Ab Antenna isolation
KR100988909B1 (ko) * 2008-09-23 2010-10-20 한국전자통신연구원 고이득 및 광대역 특성을 갖는 마이크로스트립 패치 안테나
DE102008059268A1 (de) 2008-11-27 2009-11-19 Kathrein-Werke Kg Einrichtung zur Lageerkennung einer Antennenanordnung
KR101111668B1 (ko) * 2010-08-27 2012-03-13 한국전자통신연구원 고이득 및 광대역 특성을 갖는 마이크로스트립 패치 안테나
WO2016131496A1 (fr) * 2015-02-20 2016-08-25 Huawei Technologies Co., Ltd. Élément d'antenne à ports multiples

Also Published As

Publication number Publication date
BR9813505A (pt) 2000-10-10
AU1794099A (en) 1999-07-05
CN1281590A (zh) 2001-01-24
DE69839348D1 (de) 2008-05-21
EP1038332B1 (fr) 2008-04-09
SE9704642D0 (sv) 1997-12-12
ES2301218T3 (es) 2008-06-16
DE69839348T2 (de) 2008-07-17
TW413967B (en) 2000-12-01
SE511064C2 (sv) 1999-07-26
EP1038332A1 (fr) 2000-09-27
CN1147966C (zh) 2004-04-28
BR9813505B1 (pt) 2012-05-02
SE9704642L (sv) 1999-06-13
HK1033210A1 (en) 2001-08-17

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