WO1995034102A1 - Groupement d'antennes microruban - Google Patents

Groupement d'antennes microruban Download PDF

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Publication number
WO1995034102A1
WO1995034102A1 PCT/SE1995/000623 SE9500623W WO9534102A1 WO 1995034102 A1 WO1995034102 A1 WO 1995034102A1 SE 9500623 W SE9500623 W SE 9500623W WO 9534102 A1 WO9534102 A1 WO 9534102A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
antenna according
beamforming
microstrip patches
microstrip
Prior art date
Application number
PCT/SE1995/000623
Other languages
English (en)
Inventor
Ulf Göran FORSSÉN
Jan-Erik Berg
Björn Gunnar JOHANISSON
Original Assignee
Telefonaktiebolaget Lm Ericsson
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 Telefonaktiebolaget Lm Ericsson filed Critical Telefonaktiebolaget Lm Ericsson
Priority to EP95920361A priority Critical patent/EP0763264A1/fr
Priority to AU25835/95A priority patent/AU686388B2/en
Priority to JP8500750A priority patent/JPH10501661A/ja
Publication of WO1995034102A1 publication Critical patent/WO1995034102A1/fr
Priority to FI964562A priority patent/FI964562A/fi
Priority to MXPA/A/1996/005822A priority patent/MXPA96005822A/xx

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/206—Microstrip transmission line 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
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/28—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the amplitude

Definitions

  • the present invention relates to an antenna for use in a base station in a cellular communication system, and more particularly to a microstrip antenna array which improves a base station's performance by increasing antenna gain and by reducing interference problems.
  • Figure 1 illustrates ten cells C1-C10 in a typical cellular mobile radio communication system. Normally, a cellular mobile radio system would be implemented with more than ten cells. However, for the purposes of simplicity, the present invention can be explained using the simplified representation illustrated in Figure 1. For each cell, C1-C10, there is a base station B1-B10 with the same reference number as the corresponding cell. Figure 1 illustrates the base stations as situated in the vicinity of the cell center and having omnidirectional antennas.
  • Figure 1 also illustrates nine mobile stations M1-M9 which are movable within a cell and from one cell to another. In a typical cellular radio system, there would normally be more than nine cellular mobile stations. In fact, there are typically many times the number of mobile stations as there are base stations. However, for the purpose of explaining the present invention, the reduced number of mobile stations is sufficient. Also illustrated in Figure 1 is a mobile switching center MSC.
  • the mobile switching center MSC illustrated in Figure 1 is connected to all ten base stations Bl- B10 by cables.
  • the mobile switching center MSC is also connected by cables to a fixed switching telephone network or similar fixed network. All cables from the mobile switching center MSC to the base stations B1-B10 and cables to the fixed network are not illustrated.
  • the mobile switching center MSC there may be another mobile switching center connected by cables to base stations other than those illustrated in Figure 1.
  • cables other means, for example, fixed radio links may also be used to connect base stations to the mobile switching center.
  • the mobile switching center MSC, the base stations and the mobile stations are all computer controlled.
  • each base station has an omnidirectional or directional antenna for broadcasting signals throughout the area covered by the base station.
  • signals for particular mobile stations are broadcast throughout the entire coverage area regardless of the relative positions of the mobile stations.
  • the transmitter may have one power amplifier per carrier frequency.
  • the amplified signals are combined and connected to a common antenna which has a wide azimuth beam with for example 120 or 360 degrees coverage. Due to the wide beamwidth of the common antenna, the antenna gain is low and there is no spatial selectivity which results in interference problems.
  • the microstrip antenna which is illustrated in Figure 2.
  • the microstrip antenna consists of a conductive patch 10 formed on a dielectric substrate 12, and a ground plane 14 at a distance from the patch 10.
  • the ground plane can be formed on the opposite side of the substrate 12, or the spacing between the patch and the ground plane can be completely or partially filled with air, foam, or some other dielectric material.
  • the antenna elements can be etched onto a ⁇ per-laminated board. A number of elements can then be located on the same laminate. The elements are fed in series, in parallel or both by a feed network of connecting lines 16, in the same layer as the elements or in an other layer.
  • Frequency and impedance characteristics of the microstrip antenna are a function of the antenna size, the input feed location, and the permitivity of the substrate.
  • the polarization sensitivity of the antenna can be either vertical or horizontal or both depending upon the layout of the conductive patches 10.
  • microstrip antennas have been limited because of their inherently narrow operating bandwidth.
  • Microstrip antenna elements have a relatively narrow bandwidth, typically 2-5 percent. Coverage of a wider frequency band can be achieved through the use of stacked elements or slot-coupled elements.
  • today's base stations use spatial diversity wherein two receiving antennas are typically separated by 20 or 30 wavelengths.
  • the receiver diversity used today is less attractive with narrow beam, high gain antennas since they are more expensive and larger, giving both visual problems and mounting problems.
  • an antenna for a base station in a mobile radio communication system with at least one base station and at least one mobile station comprises a microstrip antenna array with a matrix of microstrip patches with at least two columns and two rows.
  • a plurality of amplifiers is provided wherein each power amplifier is connected to a different column of microstrip patches.
  • beamforming means are connected to each power amplifier for dete ⁇ nining a direction and shape of narrow antenna lobes generated by the columns of microstrip patches.
  • an antenna for a base station and a mobile radio communication system comprises a microstrip antenna array comprising a matrix of microstrip patches with at least two columns and two rows.
  • a plurality of low noise amplifiers are used for filtering and amplifying the signals received by the microstrip antenna array, wherein each low noise amplifier is connected to a different column of microstrip patches.
  • Beamforming means are connected to each low noise amplifier for dete ⁇ riining a direction and shape of narrow antenna lobes generated by the columns of microstrip patches.
  • Figure 1 illustrates a portion of a cellular mobile communication system having cells, a mobile switching center, base stations, and mobile stations.
  • Figure 2 illustrates a microstrip antenna
  • Figure 3 illustrates a microstrip antenna array according to one embodiment of the present invention.
  • FIG. 4 illustrates another microstrip antenna array according to another embodiment of the present invention.
  • Figure 5 illustrates another microstrip antenna array according to another embodiment of the present invention.
  • Figure 6 illustrates another microstrip antenna array according to another embodiment of the present invention.
  • a microstrip antenna array as illustrated in Figure 3, can be used to increase the gain of the signals from the base station while lowering interference throughout the system.
  • the antenna array 30 consists of a matrix of microstrip patches 32 which are formed above a common ground plane 34. The elements in each column are connected either in parallel, series, or both, by connecting lines 40. While Figure 3 illustrates six columns and four rows of patches, it will be understood by one skilled in the art that the antenna array can consist of any plurality of columns and rows.
  • Each column of patches is connected to a different power amplifier 36 in the transmit direction and a different low noise amplifier 42 in the receive direction as illustrated in Figure 4.
  • each column of patches can also be connected to a plurality of power amplifiers in the transmit direction and a plurality of low noise amplifiers in the reverse direction.
  • the columns of patches can also be connected to linear power amplifiers.
  • the power amplifiers and the low noise amplifiers are connected to a beamforming apparatus 38 which creates antenna beams with desired shapes in desired directions.
  • the antenna array can generate a plurality of narrow azimuth beams or lobes, where the direction and shape of the antenna beams are determined in the beamforming apparatus 38 by signal amplitude and phase relations between different columns.
  • the base station can use the narrow beams, which have a higher gain, to broadcast and receive signals from the mobile stations in the base station's coverage area.
  • the beamforming can be implemented in a variety of ways such as digital beamforming, analog beamforming, or by a beamforming matrix, such as a Butler matrix.
  • Analog beamformers steer the beam by introducing a frequency-independent time delay, while digital Deamforming usually involves a phase delay that is equivalent to the time delay at an operating frequency.
  • a digital beamfo ⁇ ning system usually has a relatively simple receiver for each element, which down-converts the frequency into I and Q (in-phase and quadrature) channels for an A/D converter.
  • Real-time beamforming takes place by multiplying these complex pairs of samples by appropriate weights in multiply/accumulate integrated circuits.
  • the array output is formed from
  • V n complex signal from n* channel
  • W n weighting coefficient
  • e ⁇ 2 n( / ⁇ ) ⁇ ⁇ _ steerm g phaseshift
  • C B correction factor Corrections may be necessary for several reasons. These reasons include errors in the position of the element, temperature effects and the difference in behavior between those elements embedded in the array and those near the edge.
  • a plurality of narrow beams can be used to simultaneously cover a large sector using the same antenna array.
  • the present invention can use an adaptive algorithm for selecting the most feasible weight functions for the antenna.
  • One such adaptive algorithm is disclosed in U.S. Patent Application No. 08/95,224 filed February 10, 1994 which is incorporated herein by reference.
  • the patches in each column are polarized.
  • the polarization can be either vertical or horizontal, or have dual polarization with two orthogonal polarization components.
  • the two orthogonal components can for example be vertical and horizontal or diagonal polarization components.
  • the simultaneous dual polarization the two orthogonal polarized signals are combined separately for each column, and connected to separated channels in the radio unit.
  • the step of combining the signals can use any of the known combining schemes, for example, selection diversity, maximum ratio combining, etc.
  • the arbitrary elliptical polarization state can then be obtained in both the transmit and receive directions.
  • polarization diversity can be used to embrace the possibility to further suppress interferers and reduce the fading variations. This will remove the necessity to use space diversity.
  • the present invention reduces the operate power level from each power amplifier, thus easing the requirements on the linear power amplifier technology.
  • the system can also have the amplifiers and the beamforming apparatus permutated as illustrated in Figures 5 and 6.
  • the amplifiers amplify the signals in the channels that correspond to specific antenna beams wherein the shape and directions of the beams are determined by the beamforming apparatus weights at that instance.
  • the permutated system has the advantage that the independent channels do not require coherent amplifiers.
  • fault detection of an amplifier is easy since each amplifier is associated with a specific channel.
  • the system loss in the beamforming apparatus is reduced, the output power levels are reduced due to the distributed power amplification and the possibility for graceful degradation of system performance when amplifier faults occur.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

L'invention se rapporte à un agencement d'antenne pour une station de base dans un système de radiocommunication mobile comprenant au moins une station de base et au moins une station mobile. Ledit agencement d'antenne comporte un groupement d'antennes microruban doté d'une matrice de connexions à microruban composée d'au moins deux colonnes et deux rangées. En outre, une pluralité d'amplificateurs est prévue, chaque amplificateur de puissance étant connecté à une colonne de connexions à microruban différente. Enfin, des éléments conformateurs de faisceau sont connectés à chaque amplificateur de puissance afin de déterminer la direction et la forme de lobes d'antennes étroits générés par les colonnes de connexions à microruban.
PCT/SE1995/000623 1994-06-03 1995-05-31 Groupement d'antennes microruban WO1995034102A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP95920361A EP0763264A1 (fr) 1994-06-03 1995-05-31 Groupement d'antennes microruban
AU25835/95A AU686388B2 (en) 1994-06-03 1995-05-31 Microstrip antenna array
JP8500750A JPH10501661A (ja) 1994-06-03 1995-05-31 マイクロストリップアンテナアレイ
FI964562A FI964562A (fi) 1994-06-03 1996-11-14 Mikroliuskajohtoantenniryhmä
MXPA/A/1996/005822A MXPA96005822A (es) 1994-06-03 1996-11-25 Disposicion de antena de micro-franjas

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25348494A 1994-06-03 1994-06-03
US253,484 1994-06-03

Publications (1)

Publication Number Publication Date
WO1995034102A1 true WO1995034102A1 (fr) 1995-12-14

Family

ID=22960472

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1995/000623 WO1995034102A1 (fr) 1994-06-03 1995-05-31 Groupement d'antennes microruban

Country Status (7)

Country Link
EP (1) EP0763264A1 (fr)
JP (1) JPH10501661A (fr)
CN (1) CN1150498A (fr)
AU (1) AU686388B2 (fr)
CA (1) CA2191956A1 (fr)
FI (1) FI964562A (fr)
WO (1) WO1995034102A1 (fr)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996025775A1 (fr) * 1995-02-17 1996-08-22 Hazeltine Corporation Antennes offrant une faible resistance au vent faisant intervenir des unites rayonnantes et reflectrices cylindriques
EP0735608A1 (fr) * 1995-03-31 1996-10-02 Kabushiki Kaisha Toshiba Dispositif de réseau d'antennes
EP0756431A2 (fr) * 1995-07-24 1997-01-29 AT&T IPM Corp. Réseau d'amplificateurs linéaires à énergie distribuée
WO1997046039A1 (fr) * 1996-05-27 1997-12-04 Nokia Telecommunications Oy Procede servant a optimiser la couverture d'une antenne en modifiant sa configuration
WO1998047235A1 (fr) * 1997-04-11 1998-10-22 Telefonaktiebolaget Lm Ericsson (Publ) Station de base radio d'interieur a puissance satisfaisante
EP0877444A1 (fr) * 1997-05-05 1998-11-11 Nortel Networks Corporation Architecture pour la formation de faisceaux dans la liaison descendante pour une configuration avec faisceaux en chevauchement
EP0895302A2 (fr) * 1997-07-23 1999-02-03 Nortel Networks Corporation Ensemble d'antenne
EP0895436A2 (fr) * 1997-07-31 1999-02-03 Nortel Networks Corporation Combination d'un réseau d'antennes à faisceaux multiples et à couverture de secteurs
US6043790A (en) * 1997-03-24 2000-03-28 Telefonaktiebolaget Lm Ericsson Integrated transmit/receive antenna with arbitrary utilization of the antenna aperture
EP1050923A2 (fr) * 1999-05-07 2000-11-08 Lucent Technologies Inc. Système de réseaux d' antennes avec des caractéristiques de réception cohérentes et non cohérentes
WO2001006595A2 (fr) * 1999-07-21 2001-01-25 Celletra Ltd. Configuration et commande d'un reseau d'antennes actif pour des systemes de communication cellulaire
WO2001089030A1 (fr) * 2000-05-18 2001-11-22 Nokia Corporation Reseau d'antennes hybrides
US6347227B1 (en) 1997-08-28 2002-02-12 Telefonaktiebolaget Lm Ericsson Method and apparatus of determinating the position of a mobile station
US6362787B1 (en) 1999-04-26 2002-03-26 Andrew Corporation Lightning protection for an active antenna using patch/microstrip elements
EP1226724A1 (fr) * 1999-10-22 2002-07-31 Motorola, Inc. Procede et appareil permettant d'assurer un transfert de liaison aval plus doux dans un systeme de communication a acces multiple a repartition par code
US6448930B1 (en) 1999-10-15 2002-09-10 Andrew Corporation Indoor antenna
WO2003047027A1 (fr) * 2001-11-29 2003-06-05 Telefonaktiebolaget Lm Ericsson Diversite d'emission a deux faisceaux fixes
US6577879B1 (en) 2000-06-21 2003-06-10 Telefonaktiebolaget Lm Ericsson (Publ) System and method for simultaneous transmission of signals in multiple beams without feeder cable coherency
US6583763B2 (en) 1999-04-26 2003-06-24 Andrew Corporation Antenna structure and installation
US6621469B2 (en) 1999-04-26 2003-09-16 Andrew Corporation Transmit/receive distributed antenna systems
WO2003100906A2 (fr) * 2002-05-20 2003-12-04 Qualcomm Incorporated Antenne a plaques en microruban a fentes en forme de i et a large bande
US6701137B1 (en) 1999-04-26 2004-03-02 Andrew Corporation Antenna system architecture
EP1467437A1 (fr) * 1997-06-05 2004-10-13 Nortel Networks Limited Antenne à faisceaux multiples pour une station radio fixe cellulaire
US6812905B2 (en) 1999-04-26 2004-11-02 Andrew Corporation Integrated active antenna for multi-carrier applications
EP2107637A1 (fr) * 2008-03-31 2009-10-07 Ubidyne, Inc. Réseaux d'antenne et procédé correspondant pour la compensation de perte d'alimentation et la suppression de lobes secondaires
US8358970B2 (en) 1999-07-20 2013-01-22 Andrew Corporation Repeaters for wireless communication systems
US20130050056A1 (en) * 2011-08-31 2013-02-28 Qualcomm Incorporated Wireless device with 3-d antenna system

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US6608599B2 (en) * 2001-10-26 2003-08-19 Qualcomm, Incorporated Printed conductive mesh dipole antenna and method
KR100978271B1 (ko) 2008-04-01 2010-08-26 엘에스산전 주식회사 내장형 안테나를 사용한 ｒｆｉｄ 태그 및 이를 이용한ｒｆｉｄ 시스템
CN101420066B (zh) * 2008-11-21 2013-04-17 中国电子科技集团公司第三十八研究所 一种宽带单层微带贴片天线
CN101867084A (zh) * 2010-06-10 2010-10-20 西北工业大学 一种新型嵌入式复合材料智能蒙皮天线结构
US8325092B2 (en) * 2010-07-22 2012-12-04 Toyota Motor Engineering & Manufacturing North America, Inc. Microwave antenna
CN102571258B (zh) * 2012-01-31 2016-04-20 成都立鑫新技术科技有限公司 手机隔离器
CN102723592B (zh) * 2012-05-31 2016-02-10 深圳光启创新技术有限公司 一种内置型cmmb天线及通信终端
CN103354306B (zh) * 2013-06-18 2016-09-14 中国航天科工集团第三研究院第八三五七研究所 新型s波段高增益全向阵列天线
CN108134216B (zh) * 2017-12-29 2024-02-06 广东博纬通信科技有限公司 一种模拟波束赋形的天线阵列
US11340329B2 (en) * 2018-12-07 2022-05-24 Apple Inc. Electronic devices with broadband ranging capabilities
KR102290591B1 (ko) * 2020-03-25 2021-08-17 광운대학교 산학협력단 밀리미터파 대역 무선 통신을 위한 스위치 빔포밍 안테나 장치

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US5132694A (en) * 1989-06-29 1992-07-21 Ball Corporation Multiple-beam array antenna
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US5132694A (en) * 1989-06-29 1992-07-21 Ball Corporation Multiple-beam array antenna
EP0432647A2 (fr) * 1989-12-11 1991-06-19 Kabushiki Kaisha Toyota Chuo Kenkyusho Système d'antenne mobile

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996025775A1 (fr) * 1995-02-17 1996-08-22 Hazeltine Corporation Antennes offrant une faible resistance au vent faisant intervenir des unites rayonnantes et reflectrices cylindriques
EP0735608A1 (fr) * 1995-03-31 1996-10-02 Kabushiki Kaisha Toshiba Dispositif de réseau d'antennes
EP0756431A2 (fr) * 1995-07-24 1997-01-29 AT&T IPM Corp. Réseau d'amplificateurs linéaires à énergie distribuée
EP0756431A3 (fr) * 1995-07-24 1999-09-01 AT&T IPM Corp. Réseau d'amplificateurs linéaires à énergie distribuée
AU722797B2 (en) * 1996-05-27 2000-08-10 Nokia Telecommunications Oy Method for optimising coverage by reshaping antenna pattern
WO1997046039A1 (fr) * 1996-05-27 1997-12-04 Nokia Telecommunications Oy Procede servant a optimiser la couverture d'une antenne en modifiant sa configuration
US6510312B1 (en) 1996-05-27 2003-01-21 Nokia Telecommunications Oy Method for optimising coverage by reshaping antenna pattern
EP1764867A1 (fr) * 1997-03-24 2007-03-21 Telefonaktiebolaget LM Ericsson (publ) Antenne d'emmission/reception intégrée avec utilisation arbitraire de l'ouverture d'antenne et plusieurs sous-réseaux utilisant pour transmission
US6043790A (en) * 1997-03-24 2000-03-28 Telefonaktiebolaget Lm Ericsson Integrated transmit/receive antenna with arbitrary utilization of the antenna aperture
WO1998047235A1 (fr) * 1997-04-11 1998-10-22 Telefonaktiebolaget Lm Ericsson (Publ) Station de base radio d'interieur a puissance satisfaisante
US6470193B1 (en) 1997-04-11 2002-10-22 Telefonaktiebolaget L M Ericsson (Publ) Power efficient indoor radio base station
US6104935A (en) * 1997-05-05 2000-08-15 Nortel Networks Corporation Down link beam forming architecture for heavily overlapped beam configuration
EP0877444A1 (fr) * 1997-05-05 1998-11-11 Nortel Networks Corporation Architecture pour la formation de faisceaux dans la liaison descendante pour une configuration avec faisceaux en chevauchement
EP1467437A1 (fr) * 1997-06-05 2004-10-13 Nortel Networks Limited Antenne à faisceaux multiples pour une station radio fixe cellulaire
EP0895302A2 (fr) * 1997-07-23 1999-02-03 Nortel Networks Corporation Ensemble d'antenne
EP0895302A3 (fr) * 1997-07-23 2001-10-04 Nortel Networks Limited Ensemble d'antenne
EP0895436A3 (fr) * 1997-07-31 1999-07-21 Nortel Networks Corporation Combination d'un réseau d'antennes à faisceaux multiples et à couverture de secteurs
EP0895436A2 (fr) * 1997-07-31 1999-02-03 Nortel Networks Corporation Combination d'un réseau d'antennes à faisceaux multiples et à couverture de secteurs
US6347227B1 (en) 1997-08-28 2002-02-12 Telefonaktiebolaget Lm Ericsson Method and apparatus of determinating the position of a mobile station
US6812905B2 (en) 1999-04-26 2004-11-02 Andrew Corporation Integrated active antenna for multi-carrier applications
US6690328B2 (en) 1999-04-26 2004-02-10 Andrew Corporation Antenna structure and installation
US7053838B2 (en) 1999-04-26 2006-05-30 Andrew Corporation Antenna structure and installation
US6701137B1 (en) 1999-04-26 2004-03-02 Andrew Corporation Antenna system architecture
US6362787B1 (en) 1999-04-26 2002-03-26 Andrew Corporation Lightning protection for an active antenna using patch/microstrip elements
US6621469B2 (en) 1999-04-26 2003-09-16 Andrew Corporation Transmit/receive distributed antenna systems
US6597325B2 (en) 1999-04-26 2003-07-22 Andrew Corporation Transmit/receive distributed antenna systems
US6583763B2 (en) 1999-04-26 2003-06-24 Andrew Corporation Antenna structure and installation
EP1050923A3 (fr) * 1999-05-07 2002-08-21 Lucent Technologies Inc. Système de réseaux d' antennes avec des caractéristiques de réception cohérentes et non cohérentes
EP1050923A2 (fr) * 1999-05-07 2000-11-08 Lucent Technologies Inc. Système de réseaux d' antennes avec des caractéristiques de réception cohérentes et non cohérentes
US8971796B2 (en) 1999-07-20 2015-03-03 Andrew Llc Repeaters for wireless communication systems
US8630581B2 (en) 1999-07-20 2014-01-14 Andrew Llc Repeaters for wireless communication systems
US8358970B2 (en) 1999-07-20 2013-01-22 Andrew Corporation Repeaters for wireless communication systems
WO2001006595A3 (fr) * 1999-07-21 2001-11-22 Celletra Ltd Configuration et commande d'un reseau d'antennes actif pour des systemes de communication cellulaire
WO2001006595A2 (fr) * 1999-07-21 2001-01-25 Celletra Ltd. Configuration et commande d'un reseau d'antennes actif pour des systemes de communication cellulaire
US6448930B1 (en) 1999-10-15 2002-09-10 Andrew Corporation Indoor antenna
EP1226724A4 (fr) * 1999-10-22 2002-11-04 Motorola Inc Procede et appareil permettant d'assurer un transfert de liaison aval plus doux dans un systeme de communication a acces multiple a repartition par code
EP1226724A1 (fr) * 1999-10-22 2002-07-31 Motorola, Inc. Procede et appareil permettant d'assurer un transfert de liaison aval plus doux dans un systeme de communication a acces multiple a repartition par code
WO2001089030A1 (fr) * 2000-05-18 2001-11-22 Nokia Corporation Reseau d'antennes hybrides
US6577879B1 (en) 2000-06-21 2003-06-10 Telefonaktiebolaget Lm Ericsson (Publ) System and method for simultaneous transmission of signals in multiple beams without feeder cable coherency
CN1596487B (zh) * 2001-11-29 2011-10-05 艾利森电话股份有限公司 两个固定波束发射分集
US7970348B2 (en) 2001-11-29 2011-06-28 Telefonaktiebolaget Lm Ericsson (Publ) Two fixed-beams TX-diversity
WO2003047027A1 (fr) * 2001-11-29 2003-06-05 Telefonaktiebolaget Lm Ericsson Diversite d'emission a deux faisceaux fixes
WO2003100906A3 (fr) * 2002-05-20 2004-05-06 Qualcomm Inc Antenne a plaques en microruban a fentes en forme de i et a large bande
WO2003100906A2 (fr) * 2002-05-20 2003-12-04 Qualcomm Incorporated Antenne a plaques en microruban a fentes en forme de i et a large bande
EP2107637A1 (fr) * 2008-03-31 2009-10-07 Ubidyne, Inc. Réseaux d'antenne et procédé correspondant pour la compensation de perte d'alimentation et la suppression de lobes secondaires
US9318804B2 (en) 2008-03-31 2016-04-19 Kathrein-Werke Kg Method and apparatus for power loss compensation and suppression of sidelobes in antenna arrays
US20130050056A1 (en) * 2011-08-31 2013-02-28 Qualcomm Incorporated Wireless device with 3-d antenna system
US9905922B2 (en) * 2011-08-31 2018-02-27 Qualcomm Incorporated Wireless device with 3-D antenna system

Also Published As

Publication number Publication date
CN1150498A (zh) 1997-05-21
FI964562A0 (fi) 1996-11-14
CA2191956A1 (fr) 1995-12-14
MX9605822A (es) 1998-05-31
AU686388B2 (en) 1998-02-05
FI964562A (fi) 1996-11-14
EP0763264A1 (fr) 1997-03-19
AU2583595A (en) 1996-01-04
JPH10501661A (ja) 1998-02-10

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