WO1999059223A2 - Reseau d'antennes microruban double bande - Google Patents

Reseau d'antennes microruban double bande Download PDF

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Publication number
WO1999059223A2
WO1999059223A2 PCT/GB1999/001480 GB9901480W WO9959223A2 WO 1999059223 A2 WO1999059223 A2 WO 1999059223A2 GB 9901480 W GB9901480 W GB 9901480W WO 9959223 A2 WO9959223 A2 WO 9959223A2
Authority
WO
WIPO (PCT)
Prior art keywords
antennas
antenna
dual
array
microstrip
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
PCT/GB1999/001480
Other languages
English (en)
Other versions
WO1999059223A3 (fr
Inventor
Martin Joseph Archer
Brian Stuart Collins
Tao Huang
Zidong Liu
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.)
CSA Ltd
Original Assignee
CSA Ltd
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
Priority claimed from GBGB9810050.6A external-priority patent/GB9810050D0/en
Priority claimed from GBGB9810047.2A external-priority patent/GB9810047D0/en
Application filed by CSA Ltd filed Critical CSA Ltd
Priority to AU38389/99A priority Critical patent/AU3838999A/en
Publication of WO1999059223A2 publication Critical patent/WO1999059223A2/fr
Publication of WO1999059223A3 publication Critical patent/WO1999059223A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • 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
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H01Q5/42—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more imbricated arrays
    • 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

Definitions

  • This invention relates to microstrip antennas, sometimes known as patch antennas. More particularly the invention relates to the construction of microstrip antenna arrays, and to dual-band antenna structures using microstrip elements.
  • Patch antennas are used for example in mobile telephone communications.
  • a patch antenna comprises a thin metallic strip or patch placed a small fraction of a wavelength above a ground plane.
  • the patch may be of any of a variety of shapes but most typically is circular, or is rectangular (which term as used herein includes square) with length L and width , as shown in Figure 1 of the accompanying drawings.
  • the known patch antenna 10 shown in Figure 1 has a conductive patch 12 mounted on a material dielectric substrate 14, which is mounted on a conductive ground plane 16. The dielectric can however be air.
  • the direction of maximum radiation of the antenna is generally normal to the plane of the patch 12.
  • the material dielectric substrate 14 has dielectric constant ⁇ r typically in the range 2.2 ⁇ r ⁇ 12.
  • the substrate typically provides the spacing between the patch and the ground plane.
  • small substrate thicknesses h are preferred to minimise undesired radiation and coupling, and also lead to smaller element sizes. However they then have smaller bandwidths, the bandwidth of a patch antenna generally being quite narrow in any event.
  • the feed to a rectangular patch will normally be by means of a short microstrip line 18 to the mid-point of one of its sides, as shown in Figure 1.
  • patch antennas are used for example for mobile telephone communications.
  • Mobile telephones use two main frequency ranges, namely 860 to 970 GHz for GSM telephones and either 1710 to 1880 GHz for the PCN band or 1850 to 1990 GHz for the PCS band.
  • an antenna for a mobile telephone system base station capable of dual-band operation on both the GSM band and either the PCN or the PCS band (which may for convenience be referred to as the "PCN/PCS band”) .
  • the frequencies of the PCN/PCS band are approximately double those of the GSM band, and the same antenna clearly can not be used for both.
  • the dual-band antenna 30 comprises a first antenna section 32 for use at a lower frequency band. This has a square radiating patch 34 above a dielectric substrate 36 carrying or mounted on a ground plane 38.
  • the second antenna section for use at a higher frequency band comprises a second square patch 44 forming part of the second antenna section 43 and mounted on the upper surface of a piece of dielectric 42 adhered over the patch 34.
  • an antenna structure is formed which can operate for transmission and/or reception over two frequency ranges to provide plane polarised radiation.
  • the lengths of the sides of the patches 34 and 44 are approximately half the wavelength (actually half the electrical wavelength, account being taken of the dielectric constant, etc.).
  • the thickness of the substrate 36 is typically about 2mm. Note that the drawings are not to scale.
  • United Kingdom Patent Application GB-A-2, 251, 340 shows in Figure 5 an antenna array structure where two different frequencies of 2.265 and 2.087 GHz are transmitted by respective side-by-side arrays.
  • the arrays comprise square patches of the same size and spacing and are driven to provide circular polarisation.
  • the elements of the two arrays are offset from the common longitudinal axis and the resultant pattern will be asymmetric.
  • United States Patent US-A-4 , 012 , 741 also has two antenna arrays, as shown in Figure 3 of that patent, with elements and spacings in common.
  • the preferred embodiment takes the form of a dual-band antenna array for use in a base station for mobile telephone communications which consist of a first linear array of microstrip or patch antennas for use over the GSM band and a second linear array of crossed dipoles for use over the PCN band.
  • the PCN antennas are at half the spacings of the GSM antennas. Alternate ones of the PCN crossed dipole antennas are located above respective GSM patch antennas, and a conductive plate or sheet between them functions both as a parasitic element for the microstrip antenna and as a reflector for the crossed dipole antenna.
  • Figure 1 is a general view of a known patch or microstrip antenna
  • Figure 2 is an illustrative side view of a known dual-band stacked patch antenna arrangement
  • Figure 3 is a plan view of a first dual-band antenna array embodying the invention for use on the GSM and PCN bands;
  • Figure 4 is a side view relative to Figure 3 of the antenna elements;
  • Figure 5 is an isometric view of two of the antenna element stations in the array of Figures 3 and 4, showing the two types of structure used;
  • Figure 6 is a side view showing a combined GSM and PCN antenna structure in the array of Figure 3;
  • Figure 7 is a side view of a PCN only antenna structure in the array of Figure 3;
  • Figure 8 is a detail showing the top of the PCN antennas;
  • FIG. 9 is a diagrammatic detail showing the arrangement of the patch element in the GSM antennas.
  • Figure 10 is a view similar to Figure 5 of a slightly modified antenna structure
  • FIG. 11 shows the feeds to the GSM antenna patches
  • Figure 12 shows the feeds to the PCN antenna dipoles
  • Figure 13 is a diagrammatic view similar to Figure 3 of a second dual band antenna array embodying the invention.
  • the first embodiment of the invention will be described with reference to Figures 3 to 12, and takes the form of a dual band antenna array for use both on the GSM and the PCN/PCS frequency bands for mobile telephone communication.
  • the antenna array is illustrated in plan view in Figure 3, with the weather protection removed and, in side view in Figure 4, and a portion thereof is shown in isometric view in Figure 5.
  • the array 50 consists of a linear array of antenna structures. These comprise GSM microstrip antennas 52 each comprising a patch antenna element 54, and PCN/PCS antennas 56 each taking the form of a crossed dipole 58.
  • the GSM antennas 52 are spaced at twice the spacings of the PCN/PCS antennas 56, as there is approximately a factor of two difference in the frequencies of the two bands concerned.
  • the PCN/PCS antennas can be regarded as being at substantially half the spacings of the GSM antennas. This relationship holds best if the PCN/PCS antennas are in fact PCN antennas.
  • each GSM antenna 52 has a PCN/PCS antenna 56 at the same location.
  • each pair of GSM antennas 52 there is a further PCN/PCS antenna 56.
  • the antenna array is mounted on a base board 60 which is constituted by double-sided printed circuit board and the upper conductive surface of which forms the ground plane for the patches 54.
  • the antenna array is accommodated in a suitable housing (not shown) which may be of elongate channel shape, with a weatherproof radome covering the exposed face.
  • FIG 4 A side view of the array is shown in Figure 4.
  • the upper surface of the base board 60 constitutes the ground plane for the antenna structure.
  • the patch antenna elements 54 are mounted on a dielectric substrate 62 so as to be spaced by about 6mm from the base board 60. This is a relatively large spacing in microstrip terms, and is designed to ensure that the GSM antenna has a sufficiently broad bandwidth.
  • Projecting upwardly as seen in Figure 4 from the centre of the patch antenna element 54 are four small cylindrical rods 64, best seen in Figures 5 to 7, to support the elements of the PCN/PCS antennas 56 which are above the GSM antennas. Similar rods are fixed to the base board between the patch antennas to support the elements of the alternate PCN/PCS antennas 56.
  • each patch antenna element 54 Mounted above each patch antenna element 54 is an aluminium plate 66 forming a parasitic element for the patch antenna element 54.
  • the plate 66 is mounted on the base board 60 by means of four plastic spacers 68 illustrated in Figure 5.
  • the plate can be formed of printed circuit board.
  • the crossed dipoles 58 are mounted on the upper side of a square piece of printed circuit board 70 which itself is held near the top end of the rods 64. The crossed dipoles are arranged at 45° to the length of the array.
  • the crossed dipoles 58 which are arranged above the GSM antennas 52 make use of the plate 66 as a reflector.
  • the plate or layer 66 thus operates as a parasitic element for the GSM antenna with the patch antenna element 54, and as a reflector for the PCN/PCS antenna 56 with the crossed dipoles 58.
  • Those crossed dipoles which are not located above a GSM antenna 52 have a conductive aluminium plate 72 beneath them to operate as a reflector.
  • the size of the plate 72 differs from the size of the plate 66, so that the plate 72 does not resonate at GSM frequencies.
  • the plate 72 is held in position by plastics supports or spacers 74 similar to the spacers 68, but arranged to give a different spacing from the base board 60.
  • the sizes, spacings and orientations of the various elements are designed in well known manner so as to provide the required frequency bandwidths for the GSM antennas and the PCN/PCS antennas.
  • the top ends of the rods 64 terminate in a small square piece of board 76 which secures them together. This is also shown in the detailed view of Figure 8.
  • the lefthand rod shown constitutes a coaxial feed to the dipole.
  • the outer conductor is connected at 78 to one side of one of the dipoles.
  • the centre conductor is carried over the small terminating piece of board 76, as shown at 80 in Figure 8, and is connected to the diametrically opposed one of the four rods 64.
  • This rod is connected at 82 to the opposed half of the dipole element 58.
  • the other one of the pair of crossed dipoles is similarly connected.
  • Figure 6 shows a shorting slider 84 which may be incorporated if desired to provide a short between the rods 64. This is included at an appropriate location to provide the required radiation characteristics for the dipole .
  • Figure 9 is a detail showing the orientation of the patch antenna element 54.
  • the patch 54 is square, but is not aligned with the length of the array but rather is rotated by 45° relative thereto. Nevertheless, the parasitic element constituted by the plate 66, shown in dashed lines on Figure 9 for clarity, is indeed aligned with the length of the array. We have found that such a rotational offset of the parasitic element from the patch does not deleteriously affect the operation of the GSM antenna, and may indeed improve it.
  • Figure 9 also shows the two feed points to the patch antenna element 54.
  • the feed points 86 are located at the mid point of two adjacent sides of the square patch 54. As seen in Figure 6, the feed is upwardly from the underside of the base board 60.
  • the two feeds are electrically independent and isolated and may be used to transmit or receive two independent signals.
  • the strips extend transverse to the length of the array and lie between the parasitic element 66 and the adjacent antenna structure. These strips are shown in Figure 9. For a patch size of about 135mm, the strips are about 6mm wide and spaced about 6mm from the associated parasitic element. If the parasitic element is formed by the conductive sheet on a piece of single-sided circuit board, the strips 88 can readily be formed by etching on the same piece of board.
  • the addition of the strips 88 is found to improve the isolation between the two feed points 86.
  • FIG. 10 is an isometric view similar to Figure 5.
  • the printed circuit board 70 carrying the etched crossed dipoles 58 is extended to be substantially the same size as the dielectric substrate 66, and carries, surrounding the dipoles 58 and in substantially the same plane as them, four parasitic reflector strips 102 etched on the same printed circuit board 70.
  • These strips 102 can be in either of the two orientations shown in Figure 10, that is either parallel and perpendicular to the length of the array, as shown for the nearer of the two structures, or at 45 degrees to it, as shown for the further of the two structures seen in this figure.
  • the strips 102 can be straight, as shown, or slightly curved.
  • the top side of the base plate carries a conductive layer constituting the ground plane, and the underside may carry conductive tracks comprising the feed to some or all of the antenna elements.
  • One possible arrangement for the tracks on the underside of the base board 60 is indicated in Figure 11 which shows a corporate feed to an antenna array including six GSM antennas 52. The details of such arrangements are determined using known techniques to meet the particular array requirement. Empirical testing may be necessary to determine the optimum precise arrangement for the tracks feeding the several patch elements.
  • Figure 12 shows a similar corporate feed arrangement for the crossed dipoles 58 in an antenna array which has a total of twelve PCN/PCS antennas. These tracks may be disposed upon a lower printed circuit board (not shown) beneath the base board 60, and connect to the coaxial feeds constituted by the rods 64 and wires within them. Alternatively the feed arrangement of Figure 12 may be mounted on the underside of the base board 60 together with the GSM feed arrangement of Figure 11.
  • the arrangement described has the substantial advantage of considerable compactness compared with existing dual band antenna arrays for telephone use.
  • the array can be used as a base station with which individual mobile telephones communicate for transmission and reception.
  • the array will normally be mounted with its length vertical rather than in the apparently horizontal orientation shown.
  • the arrangement is economical of components, and is particularly effective in that regard in using the aluminium plate 66 both as a parasite element for the GSM antenna and a reflector for the PCN/PCS antenna. It should be mentioned that the arrangement works best at PCN frequencies, which are more closely double the GSM frequency range than the PCS frequencies. While the GSM and PCN/PCS arrays have been shown as being of broadly similar length, this is not necessary and the PCN/PCS array could, for example, be of shorter length than the GSM array not, therefore, occupying the full length of the structure, but instead one of the arrays may occupy at least a substantial part of the length of the dual-band antenna array.
  • the dipoles may take a different form from that shown.
  • the printed circuit-type dipoles as shown in Figures 5 and 8, could, for example, be replaced by pieces of wire of appropriate length.
  • the dipoles could be arranged in the vertical plane, in the orientation shown in Figure 6, rather than in the horizontal plane as shown. It will be appreciated that when the array as a whole is vertical, both orientations are, in fact, vertical in use.
  • the dipole is vertical and parallel to the base board, whereas in the non-illustrated alternative the dipole is vertical and perpendicular to the base board 60.
  • square patches have been described and illustrated, it should be noted that circular patches may be used instead. Some deviation from a precisely square or circular shape is possible, for example by the addition of tabs.
  • An alternative embodiment is indicated in outline in
  • a base board 92 supports three GSM antennas 94 and six PCN/PCS antennas 96.
  • the PCN/PCS antennas while lying at half the spacing of the GSM antennas, are not located on top of them but rather are located at one quarter and three quarters of the distance between two GSM antennas.
  • the GSM patches 98 are not square but rather are of cruciform shape.
  • the PCN/PCS antennas 96 may take the form of square or circular ring dipoles 100. These can be arranged to fit in the interstices of the crossed patches in the manner illustrated in Figure 13.

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

Abstract

L'invention concerne un réseau d'antennes double bande (50) utilisé dans une station de base pour les télécommunications de téléphonie mobile. Il est constitué d'un premier réseau linéaire d'antennes à plaques ou microruban (52), utilisé dans une bande GSM, et d'un deuxième réseau linéaire d'antennes à doublets croisés (56), utilisé dans une bande PCN. Les antennes PCN sont espacées à mi-chemin entre les antennes GSM. En variante, les antennes PCN à doublets croisés sont placées au-dessus des antennes PCN à plaques respectives ; une plaque ou feuille conductrice (66) placée entre elles fonctionne comme un élément parasite pour l'antenne à microruban et comme un réflecteur pour l'antenne à doublets croisés.
PCT/GB1999/001480 1998-05-11 1999-05-11 Reseau d'antennes microruban double bande Ceased WO1999059223A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU38389/99A AU3838999A (en) 1998-05-11 1999-05-11 Dual-band microstrip antenna array

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB9810050.6A GB9810050D0 (en) 1998-05-11 1998-05-11 Microstrip antenna element
GB9810050.6 1998-05-11
GBGB9810047.2A GB9810047D0 (en) 1998-05-11 1998-05-11 Improvements relating to microstrip antennas
GB9810047.2 1998-05-11

Publications (2)

Publication Number Publication Date
WO1999059223A2 true WO1999059223A2 (fr) 1999-11-18
WO1999059223A3 WO1999059223A3 (fr) 2000-01-20

Family

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Application Number Title Priority Date Filing Date
PCT/GB1999/001480 Ceased WO1999059223A2 (fr) 1998-05-11 1999-05-11 Reseau d'antennes microruban double bande

Country Status (2)

Country Link
AU (1) AU3838999A (fr)
WO (1) WO1999059223A2 (fr)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002050945A1 (fr) * 2000-12-21 2002-06-27 Kathrein-Werke Kg Antenne, en particulier antenne radio mobile
DE10064128A1 (de) * 2000-12-21 2002-07-25 Kathrein Werke Kg Patch-Antenne für den Betrieb in mindestens zwei Frequenzbereichen
EP1353405A1 (fr) * 2002-04-10 2003-10-15 Huber & Suhner Ag Antenne à double bande
FR2842025A1 (fr) * 2002-07-02 2004-01-09 Jacquelot Technologies Dispositif rayonnant bi-bande a polarisations coplanaires
JP2005020715A (ja) * 2003-06-26 2005-01-20 Andrew Corp アンテナエレメント、給電プローブ、誘電体スペーサ、アンテナ、及び複数の機器との通信方法
EP1543584A4 (fr) * 2002-07-24 2005-09-14 Centurion Wireless Tech Inc Antenne plane mutlibande a alimentation double
US7064729B2 (en) 2003-10-01 2006-06-20 Arc Wireless Solutions, Inc. Omni-dualband antenna and system
US7557768B2 (en) 1999-10-26 2009-07-07 Fractus, S.A. Interlaced multiband antenna arrays
US7868843B2 (en) 2004-08-31 2011-01-11 Fractus, S.A. Slim multi-band antenna array for cellular base stations
US20110175784A1 (en) * 2009-11-17 2011-07-21 Kmw Inc. Method for installing radiator elements arranged in different planes and antenna thereof
CN102403572A (zh) * 2011-12-13 2012-04-04 华南理工大学 一种宽带双频移动通信基站天线
US8497814B2 (en) 2005-10-14 2013-07-30 Fractus, S.A. Slim triple band antenna array for cellular base stations
WO2016076601A1 (fr) * 2014-11-11 2016-05-19 주식회사 케이엠더블유 Antenne de station de base de communication mobile
EP3065219A1 (fr) * 2015-03-02 2016-09-07 Trimble Navigation Limited Antennes à plaque de bi-fréquence
WO2017136242A1 (fr) * 2016-02-02 2017-08-10 Georgia Tech Research Corporation Capteur souple à matrice de van atta imprimé par jet d'encre
CN108649339A (zh) * 2018-05-10 2018-10-12 佛山市顺德区中山大学研究院 一种自相移双频双圆极化交叉偶极子天线
WO2019058378A1 (fr) * 2017-09-19 2019-03-28 Mashaal Heylal Antenne planaire à double bande
CN109768395A (zh) * 2018-12-24 2019-05-17 华南理工大学 多频阵列天线及组阵单元
CN110622356A (zh) * 2017-05-16 2019-12-27 华为技术有限公司 一种天线
CN110959228A (zh) * 2017-10-12 2020-04-03 华为技术有限公司 用于偶极的副反射器和馈电器件
EP3007275B1 (fr) * 2013-06-27 2020-04-29 Huawei Technologies Co., Ltd. Unité de rayonnement à antenne et antenne
US10879978B2 (en) 2018-02-23 2020-12-29 Amphenol Antenna Solutions, Inc. Differential phase shifter for hybrid beamforming
WO2021181318A1 (fr) * 2020-03-12 2021-09-16 Molex Cvs Grand Blanc, Llc Antenne à plaque empilée
WO2022152372A1 (fr) * 2021-01-13 2022-07-21 Telefonaktiebolaget Lm Ericsson (Publ) Ensemble antenne prenant en charge des modes de fonctionnement fdd et tdd et sous-ensemble réflecteur associé
WO2023213379A1 (fr) * 2022-05-03 2023-11-09 Huawei Technologies Co., Ltd. Structure d'antenne

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US12142851B2 (en) 2022-05-16 2024-11-12 Raytheon Company Low-profile circularly-polarized antenna

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Cited By (64)

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US9905940B2 (en) 1999-10-26 2018-02-27 Fractus, S.A. Interlaced multiband antenna arrays
US7557768B2 (en) 1999-10-26 2009-07-07 Fractus, S.A. Interlaced multiband antenna arrays
US7932870B2 (en) 1999-10-26 2011-04-26 Fractus, S.A. Interlaced multiband antenna arrays
US6831615B2 (en) 2000-12-21 2004-12-14 Kathrein-Werke Kg Multi-band antenna with dielectric body improving higher frequency performance
WO2002050945A1 (fr) * 2000-12-21 2002-06-27 Kathrein-Werke Kg Antenne, en particulier antenne radio mobile
US6861988B2 (en) 2000-12-21 2005-03-01 Kathrein-Werke Kg Patch antenna for operating in at least two frequency ranges
WO2002050940A3 (fr) * 2000-12-21 2002-08-29 Kathrein Werke Kg Antenne a plaque, conçue pour fonctionner dans au moins deux gammes de frequences
DE10064128A1 (de) * 2000-12-21 2002-07-25 Kathrein Werke Kg Patch-Antenne für den Betrieb in mindestens zwei Frequenzbereichen
WO2003085782A1 (fr) * 2002-04-10 2003-10-16 Huber+Suhner Ag Antenne a double bande
WO2003085781A1 (fr) * 2002-04-10 2003-10-16 Huber + Suhner Ag Antenne bi-bande
EP1353405A1 (fr) * 2002-04-10 2003-10-15 Huber & Suhner Ag Antenne à double bande
US7068222B2 (en) 2002-04-10 2006-06-27 Huber + Suhner Ag Dual band antenna
CN100342587C (zh) * 2002-04-10 2007-10-10 深圳市安捷信电气有限公司 双频带天线
FR2842025A1 (fr) * 2002-07-02 2004-01-09 Jacquelot Technologies Dispositif rayonnant bi-bande a polarisations coplanaires
WO2004006386A1 (fr) * 2002-07-02 2004-01-15 Jacquelot Dispositif rayonnant bi-bande a polarisations coplanaires
EP1543584A4 (fr) * 2002-07-24 2005-09-14 Centurion Wireless Tech Inc Antenne plane mutlibande a alimentation double
US7498988B2 (en) 2003-06-26 2009-03-03 Andrew Corporation Antenna element, feed probe; dielectric spacer, antenna and method of communicating with a plurality of devices
EP2051331A1 (fr) 2003-06-26 2009-04-22 Andrew Corporation Station de base double bande utilisant des éléments d'antenne en forme d'anneau.
US7283101B2 (en) 2003-06-26 2007-10-16 Andrew Corporation Antenna element, feed probe; dielectric spacer, antenna and method of communicating with a plurality of devices
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