WO2007126831A2 - Antenne de station de base a double polarisation a large bande - Google Patents

Antenne de station de base a double polarisation a large bande Download PDF

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Publication number
WO2007126831A2
WO2007126831A2 PCT/US2007/007593 US2007007593W WO2007126831A2 WO 2007126831 A2 WO2007126831 A2 WO 2007126831A2 US 2007007593 W US2007007593 W US 2007007593W WO 2007126831 A2 WO2007126831 A2 WO 2007126831A2
Authority
WO
WIPO (PCT)
Prior art keywords
dipole
paired
antenna assembly
antenna
radiating
Prior art date
Application number
PCT/US2007/007593
Other languages
English (en)
Other versions
WO2007126831A3 (fr
Inventor
Gang Yi Deng
John J. Dickson
Tim Gossard
Original Assignee
Powerwave Technologies, Inc.
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 Powerwave Technologies, Inc. filed Critical Powerwave Technologies, Inc.
Priority to EP07754157.1A priority Critical patent/EP2005522B1/fr
Publication of WO2007126831A2 publication Critical patent/WO2007126831A2/fr
Publication of WO2007126831A3 publication Critical patent/WO2007126831A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
    • 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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/001—Crossed polarisation dual antennas

Definitions

  • the present invention relates to antennas for receiving and/or transmitting electromagnetic signals. More particularly, the present invention relates to base station antennas for wireless communication systems.
  • transmission is performed with one polarization and reception is performed with an orthogonal polarization in order to provide isolation between the transmitted and received signals.
  • electromagnetic energy is received on both polarizations and the signals are combined to increase the signal-to-noise ratio, providing polarization diversity gain.
  • a diversity technique requires at least two signal paths that carry the same information but have u ⁇ correlated multi-path fadings.
  • Several types of diversity reception are used in base stations, including space diversity, direction diversity, polarization diversity, frequency diversity and time diversity.
  • Polarization diversity uses orthogonal polarization to provide uncorrelated paths.
  • the sense or direction of linear polarization of an antenna is measured from a fixed axis and can vary, depending on system requirements. In particular, the sense of polarization can range from vertical polarization (0 degrees) to horizontal polarization (90 degrees).
  • dual polarized antenna assembly When an antenna assembly receives or transmits signals with two normally orthogonal polarizations, such an antenna assembly is referred to as dual polarized antenna assembly.
  • dual polarized antennas must meet a certain port-to-port isolation specification. There is a need for improved port-to- port isolation in dual polarized antennas.
  • the present invention provides an antenna assembly for receiving and/or transmitting electromagnetic signals, comprising a dual polarized radiation element comprising a square arrangement of plural radiating elements, wherein the plural radiating elements form paired dipoles.
  • the square arrangement of plural radiating elements provides better than 3OdB isolation between the polarization channels.
  • Each radiating element comprises a dipole antenna
  • the antenna assembly further includes a ground plane wherein each dipole antenna projects outwardly from the ground plane.
  • Each paired dipole comprises a pair of radiating elements with radiating arms in parallel configuration, wherein a common feed line pattern provides a common input to the paired dipole.
  • each radiation element includes two paired dipoles in a box configuration, wherein each paired dipole comprises a pair of radiating elements in parallel configuration, each paired dipole having a common feed line pattern providing a common input to that paired dipole.
  • the radiating elements can be oriented such that one paired dipole provides +45° polarization and another paired dipole provides -45° polarization.
  • the present invention provides a broadband dual polarized base station antenna comprising a ground section including a ground plane, and a communication means for dual polarized communication of signals with better than 3OdB level isolation between polarization channels, wherein said communication means projects outwardly from a surface of the ground, plane.
  • the communication means comprises at least one radiation element including a dual polarized square arrangement of plural radiating elements, wherein the plural radiating elements form paired dipoles. At least one radiation element comprises plural radiation elements in arranged in a row.
  • the radiating elements are further oriented such that one paired dipole provides +45° polarization and another paired dipole provides -45° polarization, wherein the plural radiation elements are arrange in a row on the ground plane such that the radiation elements have parallel +45° polarization axis, and parallel -45° polarization axis.
  • the communication means is configured for operating in the 806 to 960 MHz frequency band, or in the 380 to 470 MHz frequency band, or in the 1710 to 2170 MHz frequency band, or in one or more of 380 to 470 MHz, 806 to 960 MHz, and 1710 to 2170 MHz frequency bands.
  • the communication means is configured for operating in one or more of 2.3 GHz, 2.4GHz, 2.5 GHz, 3.5 GHz and 5.8 GHz frequency bands.
  • the present invention provides an antenna assembly for receiving and/or transmitting electromagnetic signals, comprising a ground plane, and plural radiation elements, each radiation element comprising a square arrangement of plural radiating elements, wherein the plural radiating elements project outwardly from a surface of the ground plane, and the plural radiating elements form paired dipoles with a common feed line pattern.
  • Each radiating element comprises a dipole antenna including a first conductor extending transversely from a surface of the ground plane and electrically connected to the ground plane, the first conductor comprising a first radiating arm projecting outwardly therefrom, and a second conductor spaced from the ground plane by a dielectric and extending transversely relative to the surface of the ground plane, the second conductor comprising a second radiating arm projecting outwardly therefrom, wherein the first and second conductors are spaced from one another by a gap, and the first and second radiating arms project outwardly in essentially opposite directions.
  • Fig. 1a shows an isometric view of an example dual polarized radiation element with mirrored dipole pairs, in accordance with the present invention.
  • Fig. 1b shows an isometric view of one of the dipole antennas in Fig. 1a, according to an embodiment of the present invention.
  • Fig. 1c shows one of the dipole arms of the dipole antenna in Fig. 1b, according to an embodiment of the present invention
  • Fig. 1d shows another one of the dipole arms of the dipole antenna in Fig. 1c, according to an embodiment of the present invention.
  • Fig. 2 shows an isometric view of plural dual polarized radiation elements configured on a ground plane in horizontal and vertical orientation, according to an embodiment of the present invention.
  • Fig. 3 shows an array of dipole pairs from the radiation elements in Fig. 2, having a common feed line, according to an embodiment of the present invention.
  • Fig. 4 shows another array of dipole pairs from the radiation elements in Fig. 2, having a common feed line, according to an embodiment of the present invention.
  • Fig. 5 shows the isometric view of a +45° dipole pair in the dual polarized radiation element of Fig. 1a, according to an embodiment of the present invention.
  • Fig. 6 shows the isometric view of a -45° dipole pair in the dual polarized radiation element of Fig. 1a, according to an embodiment of the present invention.
  • Fig.7a-c show how examples of using a clip to hold adjacent dipole antennas together, according to the present invention.
  • Fig. 8a-d show a top view of four examples of box dipole arrangements, according to- the present invention.
  • Fig. 9 shows an example 7/16 Din connector to microstrip line transition, according to the present invention.
  • the present invention provides a dual polarized broadband base station antenna assembly for wireless communication systems.
  • the antenna assembly employs a dual polarized boxed arrangement radiation element with improved isolation between polarization channels.
  • the box arrangement (box configuration) provides improved port-to-port isolation (isolation between polarization channels), wherein in one embodiment the isolation level is better than 3OdB.
  • the radiation element includes plural dipole antennas, wherein each dipole antenna has a paired strips line feed. The microstrip to paired strips line transition is very broad band.
  • the boxed shape arrangement improves the isolation dramatically.
  • Such antenna design may be used for a "cellular" frequency band e.g. 806 - 960 MHz. Alternatively, the same design may operate at e.g.
  • the 380 - 470 MHz band is e.g. 1710 - 2170 MHz.
  • the antenna design may also be employed in a number of other frequency bands as well, such as WiMax 2.3 GHz, 2.5 GHz, 3.5 GHz, WiFi 2.4GHz, 5.8 GHz frequency bands, etc.
  • Fig. 1a shows an example dual polarized boxed arrangement radiation element 1 with mirrored dipoles, for use in a dual polarized antenna with isolation between polarization channels according to the present invention.
  • the radiation element 1 comprises plural dipole antennas (radiating elements) 10 arranged in a general square configuration to provide a boxed arrangement (Fig. 1a).
  • the radiation element 1 comprises four dipole antennas 10.
  • each dipole antenna 10 includes two arms (radiating members) 18, 20, a ground plate 12 and two electrical conductors/legs 14 and 16.
  • Fig. 1b shows an isometric view of a single dipole antenna 10.
  • the arms 18. 20 can be straight or curved.
  • the conductor 16 is attached to ground using the plate 12, with a dipole arm 18 (Fig. 1d) towards one side, while the other conductor 14 is spaced to the ground by a dielectric, such as air, foam, etc., with a dipole arm 20 (Fig. 1c) towards the opposite side of dipole arm 18, therefore forming a dipole configuration.
  • Each dipole arm forms a radiating section.
  • the conductor 14 and dipole arm 20 are formed/stamped from a sheet of conductive material, forming an L-shape. Further, the conductor 16 and dipole arm 18 are formed/stamped from a sheet of conductive material, forming an L- shape.
  • the input conductors 14 and 16 are separated by a gap 22 (e.g., Fig. 8a).
  • the conductor 14 connects a part of the dipole arm 20 to a feed line 24 and the conductor 16 connects a part of the dipole arm 18 to ground via the plate 12.
  • the conductors 14 and 16 form a paired strips transmission line having an impedance.
  • the arms 18, 20 also have an impedance.
  • the impedance of the paired strips transmission line 14, 16, is adjusted by varying the width of conductor sections 14, 16 and/or the gap 22 therebetween.
  • the specific dimensions vary with the application.
  • the impedance of the corresponding feed section is adjusted to match the intrinsic input impedance of each dipole.
  • the two conductor sections 14, 16 of the dipole antenna form a balanced paired strips transmission line; therefore, it is unnecessary to provide a balun.
  • This provides the antenna 10 with a very wide impedance bandwidth. Also, the antenna 10 has a stable far-field pattern across the impedance bandwidth.
  • Fig. 1d shows the dipole arm 18 that can be attached to a ground plane via the plate 12 and Fig. 1c shows the dipole arm 20 with the microstrip feed line 24 attached.
  • the feed line 24 (and its extension feed line 11A or 11B) comprises a microstrip feed line spaced from the ground plane by non-conductor such as air dielectric (e.g., 31 in Fig. 9).
  • a similar spacing mechanism can be used for spacing the conductor 14 from the ground plane 5.
  • the impedance of the microstrip line is adjusted by varying the width of the line 24, and/or the space between the microstrip line to the ground plane.
  • the feed line 24 is shown as a unitary element of the conductor 14.
  • the conductor section 16 can be connected to the ground plane by any suitable fastening device such as a nut and bolt, a screw, a rivet, or any suitable fastening method including soldering, welding, etc.
  • suitable fastening device such as a nut and bolt, a screw, a rivet, or any suitable fastening method including soldering, welding, etc.
  • the suitable connection provides both an electrical and mechanical connection between the conductor 16 and ground plane.
  • Fig. 2 shows another example wherein plural radiation elements 2 are configured on a ground plane 5, according to the present invention.
  • Each dipole antenna 10 forms a dipole, and has two neighboring (adjacent) orthogonal dipole antennas in the box shape of a radiation element 2, and one parallel (across) dipole antenna in said box shape.
  • the box dipole formed- by each dipole antenna 10 couples strongly with its neighboring orthogonal dipoles 10.
  • two parallel dipoles are fed with equal phase and amplitude and are arranged symmetrically with respect to the orthogonal dipole(s), then the coupled energy from one neighboring dipole will be of equal magnitude and opposite phase as energy from the other neighboring dipole. Then the two coupled fields therefore cancel out.
  • the isolation between two polarization channels will be improved dramatically because of the boxed dipole arrangement.
  • the antennas 10 are paired with a common feed pattern (e.g., 11A or 11B) providing a common input.
  • Fig. 5 shows a pair of dipole antennas 10 forming a +45° polarization radiating dipole antenna pair (dipole pair A) with a common feed line 11 A.
  • Fig. 6 shows another pair of dipole antennas 10 forming a -45° polarization radiating dipole antenna pair (dipole pair ⁇ ) with a common feed line 11 B.
  • the dipole pairs A and B are arranged to obtain the square configuration ⁇ 45° polarization radiation element 1 in Fig. 1a.
  • Plural radiation elements 1 can be arranged in an array.
  • Fig. 3 shows an array 13A of four dipole pairs 17A having a common feed line 11 A.
  • Each dipole pair 17A comprises a pair of antennas 10.
  • Fig. 4 shows another array 13B of four dipole pairs 17B 1 having a common feed line 11 B.
  • the arrays 13A and 13B are arranged to obtain the configuration of four radiation elements 1 shown in Fig. 2.
  • the ground plane 5 has a length and a vertical axial along the length, and the dipole radiating antennas 10 project outwardly (transversely) from a surface of the ground plane 5.
  • Fig. 7a shows how a non-conducting clip 15 (e.g., plastic clip) may be employed to hold a pair of adjacent (orthogonal) dipole antennas 10 together, to form an essentially square configuration for four dipole antennas 10.
  • each clip 15 is L-shaped with ends 15A, 15B 1 which as Fig. 7c shows by example in more detail, snap into holes in the arms 20, 18, respectively of two orthogonal dipole antennas 10 to hold the orthogonal antennas together.
  • Fig. 7c shows by example in more detail, snap into holes in the arms 20, 18, respectively of two orthogonal dipole antennas 10 to hold the orthogonal antennas together.
  • the present invention is not limited to the examples shown in
  • Figs, ⁇ a-d show top views of four example, box dipole antenna arrangements, with the same box dipole configuration orientation, according to the present invention.
  • Fig. 8a shows four dipole antennas 10K, 10L, 10M and 10N arranged as a square configuration ⁇ 45° polarization radiation element 1A.
  • the antennas 10K and 10L form a +45° polarization dipole pair A
  • the antennas 10M and 10N form a -45° polarization dipole pair B.
  • the paired dipole is mirrored, wherein all the ground dipoles are attached to ground through ground plate 12, which is mirrored by the + or - 45 degree axis.
  • the arm 18 of each dipole antenna extends from the respective conductive leg in planar form.
  • the arm 20 of each dipole antenna extends from the respective conductive leg as a flat element.
  • the arms 18, 20 of the antenna 10K are in the same plane. The same holds for the antennas 10L, 10M and 10N.
  • the plane of the arms 18, 20 of the antenna 10K is parallel to the plane of the arms 18, 20 of antenna 10L.
  • the plane of the arms 18, 20 of the antenna 10M is parallel to the plane of the arms 18, 20 of antenna 10N.
  • Fig. 8a also shows +45° polarization axis and -45° polarization axis in relation to the orthogonal X 1 Y and Z axis in three dimensions.
  • the -45° axis is perpendicular to the plane of the arms of the antennas 10K and 10L.
  • the +45° axis is perpendicular to the plane of the arms of the antennas 10M and 10N.
  • the Y and Z axis form a Y-Z plane which is in the plane of the drawing sheet.
  • the +/-45° axis are in the Y-Z plane.
  • the +/- 45° axis are in reference to 0 degree (Z axis).
  • the X axis is perpendicular to the Y-Z plane (i.e., projecting outwardly from the Y-Z plane).
  • plural radiation elements 1A can be arranged in an array (row or column) along their Y-axis on a ground plane which is in the Y-Z plane of all the radiation elements 1A. In such an arrangement, the radiation elements 1A have parallel +45° polarization axis in the Y-Z plane, and similarly parallel -45° polarization axis in the Y-Z plane.
  • Fig. 8b shows four dipole antennas 10K, 10L, 10M and 10N, arranged as a square configuration ⁇ 45° polarization radiation element 1B, wherein the antennas 10K and 10L form a +45° polarization dipole pair A, and antennas 10M and 10N form a -45° polarization dipole pair B.
  • the arm 18 of each dipole antenna includes an essentially S-shaped section 19 extending from the respective conductive leg.
  • the arm 20 of each dipole antenna includes an essentially S-shaped section 19 extending from the respective conductive leg.
  • the section 19 allows maintaining symmetry of the box dipole configuration, and it allows improving the isolation between those input ports or polarizations.
  • the arms 18, 20 of the antenna 10K are in the same plane.
  • the plane of the arms 18, 20 of the antenna 10K is parallel to the plane of the arms 18, 20 of antenna 10L.
  • the plane of the arms 18, 20 of the antenna 10M is parallel to the plane of the arms 18, 20 of antenna 1.0N.
  • the -45° axis is perpendicular to the plane of the arms of the antennas 10K and 10L.
  • the +45° axis is perpendicular to the plane of the arms of the antennas 10M and 10N.
  • Plural radiation elements 1B can be arranged in an array along their Y-axis on a ground plane which is in the Y-Z plane of al the radiation elements 1 B. Fig.
  • each dipole antenna includes an essentially S-shaped section 19 extending from the respective conductive leg.
  • the arm 20 of each dipole antenna is flat extending from the respective conductive leg.
  • the section 19 allows maintaining symmetry of the box dipole configuration, and -it allows improving, the .isolation between those input ports or polarizations.
  • the arms 18, 20 of the antenna 10K are in the same plane.
  • the plane of the arms 18, 20 of the antenna 10K is parallel to the plane of the arms 18, 20 of antenna 10L.
  • the plane of the arms 18, 20 of the antenna 10M is parallel to the plane of the arms 18, 20 of antenna 10N.
  • the -45° axis is perpendicular to the plane of the arms of the antennas 10K and 10L.
  • the +45° axis is perpendicular to the plane of the amis of the antennas 10M and 10N.
  • Plural radiation elements 1C can be arranged in an array along their Y-axis on a ground plane which is in the Y-Z plane of al the radiation elements 1C.
  • Fig. 8d shows four dipole antennas 10K, 10L, 10M and 10N, arranged as a square configuration ⁇ 45° polarization radiation element 1D, wherein antennas 10K and 10L form a +45° polarization dipole pair A, and antennas 10M and 10N form a -45° polarization dipole pair B.
  • the arm 20 of each dipole antenna includes an essentially S-shaped section 19 extending from the respective conductive leg.
  • the arm 18 of each dipole antenna is flat extending from the respective conductive leg.
  • the section 19 allows maintaining symmetry of the box dipole configuration, and it allows improving the isolation between those input ports or polarizations.
  • the arms 18, 20 of the antenna 10K are in the same plane.
  • the plane of the arms 18, 20 of the antenna 10K is parallel to the plane of the arms 18, 20 of antenna 10L.
  • the plane of the arms 18, 20 of the antenna 10M is parallel to the plane of the arms 18, 20 of antenna 10N.
  • the -45° axis is perpendicular to the plane of the arms of the antennas 10K and 10L.
  • the +45° axis is perpendicular to the plane of the arms of the antennas 10M and 10N.
  • Plural radiation elements 1D can be arranged in an array along their Y-axis on a ground plane which is in the Y-Z plane of al the radiation elements 1 D.
  • Fig. 9 shows an example connector 30 for direct coupling to each feed line (e.g., air microstrip lines 11 A, 11B) and ground plane 5.
  • the connector 30 includes an electrically conductive cylindrical threaded section 32 for receiving a coaxial- cable, a conductive plate 34 for electrically coupling the section 32 to the ground plane 5, and an axial conductor 36 for electrical coupling to a feed line such as feed line 11 A. At least a portion of the conductor 36 is threaded for fastening to the feed line 11A via a nut 35, and spaced from the ground plane 5 via an electrically insulating washer 37.
  • the conductor 36 is covered by the insulation sleeve 38 for electrical isolation from the conductive plate 34 and the ground plane 5.
  • the feed line 11A is space from the ground plane 5 by a dielectric sleeve 31 which is held in place between the feed line 11 A and the ground plane 5 by an electrically insulating (non-conductive) screw 33.
  • the connector 30 can comprise a modified 7/16 Din connector, which eliminates the typical RG401 input cable cost and assembly costs, and also eliminate the coaxial cable to microstrip transition cost and assembly cost. Another connector 30 can be used for connecting another input to the feed line 11 B, in a similar fashion.

Abstract

La présente invention concerne une antenne de station de base à large bande à double polarisation pour des systèmes de communication sans fil. La présente invention utilise un élément rayonnant à agencement caissonné à double polarisation avec une isolation élevée entre les canaux de polarisation. Les éléments rayonnants émettent vers l'extérieur depuis la surface d'un plan de sol. Les éléments d'antenne sont des dipôles en paire.
PCT/US2007/007593 2006-03-30 2007-03-29 Antenne de station de base a double polarisation a large bande WO2007126831A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07754157.1A EP2005522B1 (fr) 2006-03-30 2007-03-29 Antenne de station de base a double polarisation a large bande

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US78744206P 2006-03-30 2006-03-30
US60/787,442 2006-03-30

Publications (2)

Publication Number Publication Date
WO2007126831A2 true WO2007126831A2 (fr) 2007-11-08
WO2007126831A3 WO2007126831A3 (fr) 2008-09-25

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PCT/US2007/007593 WO2007126831A2 (fr) 2006-03-30 2007-03-29 Antenne de station de base a double polarisation a large bande

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EP (1) EP2005522B1 (fr)
WO (1) WO2007126831A2 (fr)

Cited By (5)

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FR2965411A1 (fr) * 2010-09-29 2012-03-30 Bouygues Telecom Sa Antenne compacte a fort gain
US8704727B2 (en) 2009-05-11 2014-04-22 Bouygues Telecom Compact multibeam antenna
CN107910636A (zh) * 2017-10-26 2018-04-13 武汉虹信通信技术有限责任公司 一种宽频辐射单元及天线
CN111129773A (zh) * 2019-09-30 2020-05-08 京信通信技术(广州)有限公司 调偏装置及辐射单元
EP3902063B1 (fr) * 2018-12-27 2023-12-20 Japan Aviation Electronics Industry, Limited Antenne, substrat et dispositif de communication

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CN111224224B (zh) 2018-11-27 2021-12-21 华为技术有限公司 天线和阵列天线

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Cited By (10)

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Publication number Priority date Publication date Assignee Title
US8704727B2 (en) 2009-05-11 2014-04-22 Bouygues Telecom Compact multibeam antenna
FR2965411A1 (fr) * 2010-09-29 2012-03-30 Bouygues Telecom Sa Antenne compacte a fort gain
WO2012041979A1 (fr) * 2010-09-29 2012-04-05 Bouygues Telecom Antenne compacte a fort gain
CN103222110A (zh) * 2010-09-29 2013-07-24 布盖斯电信公司 紧凑型高增益天线
US9136593B2 (en) 2010-09-29 2015-09-15 Bouygues Telecom Compact high-gain antenna
CN107910636A (zh) * 2017-10-26 2018-04-13 武汉虹信通信技术有限责任公司 一种宽频辐射单元及天线
EP3902063B1 (fr) * 2018-12-27 2023-12-20 Japan Aviation Electronics Industry, Limited Antenne, substrat et dispositif de communication
US11862877B2 (en) 2018-12-27 2024-01-02 Japan Aviation Electronics Industry, Limited Antenna, board and communication device
CN111129773A (zh) * 2019-09-30 2020-05-08 京信通信技术(广州)有限公司 调偏装置及辐射单元
CN111129773B (zh) * 2019-09-30 2021-05-28 京信通信技术(广州)有限公司 调偏装置及辐射单元

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Publication number Publication date
EP2005522A2 (fr) 2008-12-24
WO2007126831A3 (fr) 2008-09-25
EP2005522B1 (fr) 2015-09-09
EP2005522A4 (fr) 2009-06-03

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