WO1998011626A1 - Systeme d'antenne ameliorant la zone de couverture, la portee et la fiabilite de stations de base sans fil - Google Patents

Systeme d'antenne ameliorant la zone de couverture, la portee et la fiabilite de stations de base sans fil Download PDF

Info

Publication number
WO1998011626A1
WO1998011626A1 PCT/US1997/016338 US9716338W WO9811626A1 WO 1998011626 A1 WO1998011626 A1 WO 1998011626A1 US 9716338 W US9716338 W US 9716338W WO 9811626 A1 WO9811626 A1 WO 9811626A1
Authority
WO
WIPO (PCT)
Prior art keywords
amplifier
antenna
antenna system
disposed
antenna elements
Prior art date
Application number
PCT/US1997/016338
Other languages
English (en)
Inventor
Shashikank M. Sanzgiri
John P. Volpi
Anthony J. Vespa
Paul C. Gilliland
Original Assignee
Raytheon Company
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 Raytheon Company filed Critical Raytheon Company
Priority to EP97909849A priority Critical patent/EP0943164A1/fr
Priority to AU47357/97A priority patent/AU4735797A/en
Priority to JP10513960A priority patent/JP2001500691A/ja
Priority to CA002265987A priority patent/CA2265987A1/fr
Publication of WO1998011626A1 publication Critical patent/WO1998011626A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0025—Modular arrays
    • 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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • This invention relates to an antenna system and, more specifically, to an antenna system primarily for use in conjunction with base station in mobile communications systems.
  • Mobile communication systems generally include a base station for receiving and transmitting electromagnetic radiations with the mobile terminal disposed within the coverage area of the base station for transmitting electromagnetic radiations to and receiving such radiations from the base station and where several such base stations are generally linked together through base station controllers (BSCs) and master station controllers (MSCs) to provide a seamless communication link between a mobile terminal and its calling party.
  • BSCs base station controllers
  • MSCs master station controllers
  • PCSs personal communication systems
  • PCNs personal communication networks
  • the area, range and reliability of base stations are generally limited in their coverage area by the base station receive noise figure and the transmit effective isotropic radiated power (EIRP) .
  • the presently used PCN base station architecture utilizes a vertical column array comprising a plurality of spaced apart radiating elements for transmission and a separate such plurality of radiating elements for reception.
  • the antenna elements are generally disposed in a vertical straight line on a support, the distance between extreme antenna elements often being quite large, often a few meters.
  • the receive antenna configuration generally comprises two widely separated columns to provide spatial diversity or a single orthogonally polarized column comprising two orthogonal polarization outputs to provide polarization diversity.
  • the radiating elements are generally electrically conductive members disposed on a support and are generally spaced between three fourths and one wavelength apart.
  • the antenna elements are generally connected to a combiner via short transmission lines.
  • the radiating element is fed by a ground based high power amplifier through a long cable, typically between 50 and 200 feet.
  • a ground based high power amplifier typically between 50 and 200 feet.
  • the placement of the power amplifiers within the base station also requires increased power from the amplifiers to overcome the insertion loss from the feed cable as well as the combiner.
  • the combiner output is fed to a filter/low noise amplifier (LNA) combination through either a short transmission line (as in PCS systems for mast mounted LNAs) or through a long cable (as in cellular systems for base station integrated LNAs.
  • LNA filter/low noise amplifier
  • Dual redundant amplifiers are typically provided when mast mounted electronics are used to improve reliability at the expense of complexity.
  • the effective noise increase contributed by the ohmic losses in the array combiner and feed cable are amplified by the low noise amplifier and thus contribute to the increase in the system noise figure.
  • An active phased array antenna approach in accordance with the present invention incorporates a low power amplifier (for transmit) and/or a low noise amplifier (for receive) as closely adjacent as possible to each element of an array, generally spaced by a few centimeters or less from the associated element.
  • the antenna elements are generally disposed in a column.
  • a filter and amplifier can be coupled to a subgroup of the elements of the array, though this arrangement would provide less versatility as will be evident from the discussion hereinbelow.
  • the active antenna approach thus involves distributing a plurality of amplifiers and filters, when required, across the array aperture.
  • system noise is reduced by as much as 4.5 dB over the conventional approach in which the LNA is integrated with the base station and by as much as 1.5 dB where an LNA is integrated with the passive antenna column at the tower top or the mast of the antenna system.
  • the low power amplifiers when integrated with the radiating elements, increase the EIRP by as much as 4.5 dB (for the same amplifier power output) over the conventional approach where the power amplifiers are integrated with the base station.
  • the distributed nature of the amplifiers also improves reliability since the system can be designed to be fully compliant even after failure of one or more of the receive or transmit amplifiers. Even when sufficient failures occur to reduce overall system performance, the performance degradation is graceful rather than catastrophic.
  • Another advantage of distributed power amplifiers is that the amplifiers operate in a reduced thermal density environment, yielding enhanced reliability.
  • the reduced thermal density results from the fact that the heat is distributed across the full area occupied by the antenna elements in the array rather than in a concentrated small area as in the case of unitary high power amplifiers used in the existing PCN base stations.
  • variable attenuators and/or phase shifters can be placed in the signal path of each antenna element.
  • these variable attenuators and phase shifters can operate to provide electronic beam shaping and pointing capability.
  • the active antenna systems of the present invention can be used for receive systems using either spatial or polarization diversity and in fact are valid independent of the diversity approach employed. Therefore, all of the advantages claimed for active antennas apply to all diversity receive systems. Furthermore, in a polarization diverse receive system, both orthogonal polarizations are implemented with each polarization port fed to its own filter/LNA network and combiner.
  • FIGURE 1 is a diagram of a prior art PCN base station architecture for an antenna system for both transmission and reception of electromagnetic radiations;
  • FIGURE 2 is a diagram of an active antenna system architecture in accordance with a first embodiment of the present invention.
  • FIGURE 3 is a diagram of an active antenna system architecture in accordance with a second embodiment of the present invention.
  • FIGURE 1 there is shown a system utilizing the prior art PCN base station antenna architecture.
  • FIGURE 1 is typical of the existing state of the art for PCS antenna systems. However, the discussion that follows applies to existing cellular systems as well.
  • the system includes a transmit antenna system 1 and a receive antenna system 7.
  • the transmit antenna system 1 includes a support 3 having thereon a plurality of radiating antenna elements 5 disposed in a straight line, the distance from the topmost element to the bottommost element being a few meters.
  • the transmit antenna system 1 has a high power amplifier (HPA) 13 and a filter 15 disposed at the base station 17 with the amplifier/filter being connected to each of the radiating antenna elements 5 via a combiner 54 and a feed cable 31 with the length of the feed cable 31 varying anywhere between 15 and 70 meters, in general.
  • HPA high power amplifier
  • the long cable 31 leads to a loss of 2 to 3 dB of power transmitted by the ground based power amplifier.
  • the receive antenna system 7 includes a support 9 thereon a plurality of radiating antenna elements 11 disposed in a straight line with dimensions as in the transmit antenna system.
  • the receive antenna system 7 has a pair of filters 19, ' 21, filter 19 coupled to a pair of amplifiers 23 and 25 and filter 21 coupled to a pair of amplifiers 27 and 29.
  • Each radiating antenna element 11 is coupled to each of the filters 19 and 21 via power combiners 55 and 56 via feed cable 33 to provide vertical and horizontal outputs.
  • the filter/LNA combination is shown mounted on the mast, as is the common practice for PCS base stations. As can be seen, the ohmic losses in the combiners and short transmission lines between combiners and the filter/LNA combination contribute to the degradation in the system noise figure.
  • each radiating antenna element has its own filter and amplifier positioned as closely adjacent to the antenna element as possible.
  • FIGURE 2 wherein, for the transmit portion, each antenna element 5 is connected to its own filter 37 and amplifier 39 with the feed cable 41 extending from the base station 43 to each of the amplifiers 39 through power divider 54.
  • each radiating antenna element 11 has two orthogonally polarized outputs as in FIGURE 1 with each output have its own filter 45 and amplifier pair 47 and 49.
  • the outputs of the amplifiers 47 and 49 are combined in the power combiners 55 and 56 and are fed to the base station via feed cables 51 and 53 respectively.
  • the receive configuration with polarization diversity is shown here for the purpose of illustration. However, the claim of active antenna application holds as well for the receive configuration with spatial or any other diversity as well.
  • the positions of the amplifiers and associated filters can be reversed where amplification can take place prior to filtering or filtering can take place prior to amplification.
  • the filter When the filter is placed ahead of the amplifier, the impact of the filter loss on the system noise figure is reduced, but the amplifier stage must be designed to have high dynamic range, so that any expected interference can be passed by the amplifier to the filter without generating any significant intermodulation products.
  • the amplifier When the amplifier is placed ahead of the filter to provide out-of-band rejection of signals prior to in-band signal amplification (as shown in FIGURE 2) , the filter must have low power loss with implementation preferably performed in waveguides.
  • FIGURE 3 there is shown a variation of the architecture of FIGURE 2 wherein a variable phase shifter 51 and a variable attenuator 53 are placed in series with each combination of amplifier and filter of FIGURE 2.
  • a variable phase shifter 51 and a variable attenuator 53 are placed in series with each combination of amplifier and filter of FIGURE 2.
  • the elevation beam shaping and switching can be controlled dynamically by the service provider through a remote controller.
  • a second embodiment of the invention comprises only the receive portion of the above described structure and a third embodiment of the invention comprises only the transmit portion of the above described structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

Cette invention se rapporte à un système d'antenne actif qui possède plusieurs éléments d'antenne disposés en colonne, chacun de ces éléments ou chaque sous-ensemble d'éléments étant intégré à un amplificateur et à d'autres composants formant faisceau. Un amplificateur et un filtre séparés sont disposés à proximité immédiate et connectés à chacun des éléments d'antenne ou à un sous-ensemble d'éléments d'antenne et un combineur/diviseur séparé est connecté à chacun des amplificateurs. Les éléments d'antenne, l'amplificateur et le filtre sont disposés sur un support commun. Une station de base est connectée par les câbles d'alimentation, à distance de chacun des amplificateurs. Un premier groupe de ces éléments d'antenne ayant des amplificateurs basse puissance forme un système d'antenne émetteur et/ou un second groupe de ces éléments d'antenne actifs ayant des amplificateurs à faible bruit forme un système d'antenne récepteur. Un atténuateur variable et un circuit de déphasage variable peuvent être intégrés à chaque amplificateur et peuvent être utilisés pour la mise en forme du faisceau et le pointage électronique du faisceau. Pour la combinaison de diversité, on utilise des antennes actives séparées dans l'espace ou à diversité de polarisation. Pour une réalisation avec des antennes actives en diversité de polarisation, on utilise une colonne partagée ou deux colonnes à polarisation orthogonale adjacentes.
PCT/US1997/016338 1996-09-16 1997-09-15 Systeme d'antenne ameliorant la zone de couverture, la portee et la fiabilite de stations de base sans fil WO1998011626A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP97909849A EP0943164A1 (fr) 1996-09-16 1997-09-15 Systeme d'antenne ameliorant la zone de couverture, la portee et la fiabilite de stations de base sans fil
AU47357/97A AU4735797A (en) 1996-09-16 1997-09-15 Antenna system for enhancing the coverage area, range and reliability of wireless base stations
JP10513960A JP2001500691A (ja) 1996-09-16 1997-09-15 ワイヤレス基地局のカバレージ領域、範囲及び信頼度強化用のアンテナシステム
CA002265987A CA2265987A1 (fr) 1996-09-16 1997-09-15 Systeme d'antenne ameliorant la zone de couverture, la portee et la fiabilite de stations de base sans fil

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2619196P 1996-09-16 1996-09-16
US60/026,191 1996-09-16

Publications (1)

Publication Number Publication Date
WO1998011626A1 true WO1998011626A1 (fr) 1998-03-19

Family

ID=21830391

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/016338 WO1998011626A1 (fr) 1996-09-16 1997-09-15 Systeme d'antenne ameliorant la zone de couverture, la portee et la fiabilite de stations de base sans fil

Country Status (6)

Country Link
EP (1) EP0943164A1 (fr)
JP (1) JP2001500691A (fr)
KR (1) KR20000036179A (fr)
AU (1) AU4735797A (fr)
CA (1) CA2265987A1 (fr)
WO (1) WO1998011626A1 (fr)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1049195A2 (fr) * 1999-04-26 2000-11-02 Andrew AG Structure d' antenne et leur installation
WO2001031807A2 (fr) * 1999-10-28 2001-05-03 Celletra, Ltd. Augmentation d'une station de base cellulaire
WO2001056193A1 (fr) * 2000-01-27 2001-08-02 Celletra, Ltd. Systeme et procede permettant d'augmenter une station de base cellulaire
US6362787B1 (en) 1999-04-26 2002-03-26 Andrew Corporation Lightning protection for an active antenna using patch/microstrip elements
WO2002039541A2 (fr) * 2000-11-01 2002-05-16 Andrew Corporation Systemes d'antennes distribues
US6448930B1 (en) 1999-10-15 2002-09-10 Andrew Corporation Indoor antenna
US6621469B2 (en) 1999-04-26 2003-09-16 Andrew Corporation Transmit/receive distributed antenna systems
US6701137B1 (en) 1999-04-26 2004-03-02 Andrew Corporation Antenna system architecture
US6731904B1 (en) 1999-07-20 2004-05-04 Andrew Corporation Side-to-side repeater
US6812905B2 (en) 1999-04-26 2004-11-02 Andrew Corporation Integrated active antenna for multi-carrier applications
US6934511B1 (en) 1999-07-20 2005-08-23 Andrew Corporation Integrated repeater
KR100563565B1 (ko) * 2000-11-03 2006-03-28 주식회사 케이엠더블유 안테나
WO2006019611A3 (fr) * 2004-08-09 2006-11-02 Cisco Tech Inc Systeme de transmission utilisant une architecture d'antenne et d'amplificateur compense pour equilibrer la charge de l'amplificateur de puissance, independamment du fonctionnement a signal unique ou double de l'emetteur
US7236807B1 (en) 1999-10-28 2007-06-26 Celletra Ltd. Cellular base station augmentation
EP1885024A1 (fr) * 2006-08-03 2008-02-06 Selex Sensors and Airborne Systems Limited Antenne
WO2010035922A1 (fr) * 2008-09-26 2010-04-01 Kmw Inc. Antenne pour station de base d'un système de communication mobile
US7962174B2 (en) 2006-07-12 2011-06-14 Andrew Llc Transceiver architecture and method for wireless base-stations
US8358970B2 (en) 1999-07-20 2013-01-22 Andrew Corporation Repeaters for wireless communication systems
US8384597B2 (en) 2006-10-16 2013-02-26 Telefonaktiebolaget Lm Ericsson (Publ) Tilt-dependent beam-shape system
DE102005017297B4 (de) * 2005-04-14 2015-07-09 Qualcomm Incorporated Antennenempfangssystem mit mindestens zwei Antennenzweigen zum Diversity-Empfang sowie zugehöriges Verfahren zur Phasenanpassung
US10027036B2 (en) 2011-01-28 2018-07-17 Kathrein-Werke Kg Antenna array and method for synthesizing antenna patterns
US10701534B2 (en) 2018-07-30 2020-06-30 Nxp B.V. Message relaying in vehicle-to-vehicle communication system
CN111740786A (zh) * 2020-06-10 2020-10-02 电子科技大学 一种集成光波导波束赋形装置
EP3826105A4 (fr) * 2018-08-14 2021-08-04 Huawei Technologies Co., Ltd. Système d'antennes et station de base
EP3853948A4 (fr) * 2018-09-21 2022-06-15 HRL Laboratories LLC Antenne active à large bande

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6661374B2 (en) * 2000-12-08 2003-12-09 Kmw Inc. Base transceiver station having multibeam controllable antenna system
KR100545645B1 (ko) * 2002-09-12 2006-01-24 엘지전자 주식회사 무선통신 단말기의 통신품질 개선 장치
JP5735149B2 (ja) * 2009-02-09 2015-06-17 ローム株式会社 オーディオ信号処理回路およびそれを用いたトーンコントロール回路
CN109301506A (zh) * 2018-09-19 2019-02-01 浙江安路海联科技有限公司 一种可重构圆形阵列天线系统
CN111865386B (zh) * 2020-07-21 2023-10-03 深圳创维－Rgb电子有限公司 一种有源天线系统、控制方法和无线设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0624919A1 (fr) * 1992-12-01 1994-11-17 Ntt Mobile Communications Network Inc. Appareil a antenne multilobe
EP0668627A1 (fr) * 1994-02-16 1995-08-23 Northern Telecom Limited Dispositif d'antenne pour station de base
WO1995026116A1 (fr) * 1994-03-24 1995-09-28 Ericsson Inc. Station de base pour un systeme de communication cellulaire avec des antennes a balayage electronique et procedes d'exploitation de cette station permettant une meilleure utilisation de la puissance
GB2290006A (en) * 1994-05-28 1995-12-06 Northern Telecom Ltd Base station transmitter control
GB2301712A (en) * 1995-06-02 1996-12-11 Dsc Communications Integrated directional antenna

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0624919A1 (fr) * 1992-12-01 1994-11-17 Ntt Mobile Communications Network Inc. Appareil a antenne multilobe
EP0668627A1 (fr) * 1994-02-16 1995-08-23 Northern Telecom Limited Dispositif d'antenne pour station de base
WO1995026116A1 (fr) * 1994-03-24 1995-09-28 Ericsson Inc. Station de base pour un systeme de communication cellulaire avec des antennes a balayage electronique et procedes d'exploitation de cette station permettant une meilleure utilisation de la puissance
GB2290006A (en) * 1994-05-28 1995-12-06 Northern Telecom Ltd Base station transmitter control
GB2301712A (en) * 1995-06-02 1996-12-11 Dsc Communications Integrated directional antenna

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YAMADA Y ET AL: "BASE STATION/VEHICULAR ANTENNA DESIGN TECHNIQUES EMPLOYED IN HIGH-CAPACITY LAND MOBILE COMMUNICATIONS SYSTEM", REVIEW OF THE ELCTRICAL COMMUNICATIONS LABORATORIES, vol. 35, no. 2, 1 March 1987 (1987-03-01), pages 115 - 121, XP000572063 *

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6621469B2 (en) 1999-04-26 2003-09-16 Andrew Corporation Transmit/receive distributed antenna systems
US7053838B2 (en) 1999-04-26 2006-05-30 Andrew Corporation Antenna structure and installation
EP1049195A2 (fr) * 1999-04-26 2000-11-02 Andrew AG Structure d' antenne et leur installation
US6812905B2 (en) 1999-04-26 2004-11-02 Andrew Corporation Integrated active antenna for multi-carrier applications
US6362787B1 (en) 1999-04-26 2002-03-26 Andrew Corporation Lightning protection for an active antenna using patch/microstrip elements
AU775062B2 (en) * 1999-04-26 2004-07-15 Andrew Corporation Antenna structure and installation
US6701137B1 (en) 1999-04-26 2004-03-02 Andrew Corporation Antenna system architecture
US6690328B2 (en) 1999-04-26 2004-02-10 Andrew Corporation Antenna structure and installation
EP1049195A3 (fr) * 1999-04-26 2003-05-07 Andrew AG Structure d' antenne et leur installation
US6583763B2 (en) 1999-04-26 2003-06-24 Andrew Corporation Antenna structure and installation
US6597325B2 (en) 1999-04-26 2003-07-22 Andrew Corporation Transmit/receive distributed antenna systems
US6934511B1 (en) 1999-07-20 2005-08-23 Andrew Corporation Integrated repeater
US8358970B2 (en) 1999-07-20 2013-01-22 Andrew Corporation Repeaters for wireless communication systems
US8971796B2 (en) 1999-07-20 2015-03-03 Andrew Llc Repeaters for wireless communication systems
US6731904B1 (en) 1999-07-20 2004-05-04 Andrew Corporation Side-to-side repeater
US6745003B1 (en) 1999-07-20 2004-06-01 Andrew Corporation Adaptive cancellation for wireless repeaters
US8630581B2 (en) 1999-07-20 2014-01-14 Andrew Llc Repeaters for wireless communication systems
US6448930B1 (en) 1999-10-15 2002-09-10 Andrew Corporation Indoor antenna
WO2001031807A3 (fr) * 1999-10-28 2001-12-27 Celletra Ltd Augmentation d'une station de base cellulaire
WO2001031807A2 (fr) * 1999-10-28 2001-05-03 Celletra, Ltd. Augmentation d'une station de base cellulaire
US7236807B1 (en) 1999-10-28 2007-06-26 Celletra Ltd. Cellular base station augmentation
WO2001056193A1 (fr) * 2000-01-27 2001-08-02 Celletra, Ltd. Systeme et procede permettant d'augmenter une station de base cellulaire
US6987990B2 (en) 2000-01-27 2006-01-17 Celletra Ltd. Cellular base station augmentation system and method
GB2387274B (en) * 2000-11-01 2004-09-01 Andrew Corp Distributed antenna systems
GB2387274A (en) * 2000-11-01 2003-10-08 Andrew Corp Distributed antenna systems
WO2002039541A3 (fr) * 2000-11-01 2003-05-01 Andrew Corp Systemes d'antennes distribues
WO2002039541A2 (fr) * 2000-11-01 2002-05-16 Andrew Corporation Systemes d'antennes distribues
KR100563565B1 (ko) * 2000-11-03 2006-03-28 주식회사 케이엠더블유 안테나
WO2006019611A3 (fr) * 2004-08-09 2006-11-02 Cisco Tech Inc Systeme de transmission utilisant une architecture d'antenne et d'amplificateur compense pour equilibrer la charge de l'amplificateur de puissance, independamment du fonctionnement a signal unique ou double de l'emetteur
US7466670B2 (en) 2004-08-09 2008-12-16 Cisco Technology, Inc. Transmit system employing an antenna and balanced amplifier architecture which provides power amplifier load balancing independent of single or dual signal operation of the transmitter
DE102005017297B4 (de) * 2005-04-14 2015-07-09 Qualcomm Incorporated Antennenempfangssystem mit mindestens zwei Antennenzweigen zum Diversity-Empfang sowie zugehöriges Verfahren zur Phasenanpassung
US7962174B2 (en) 2006-07-12 2011-06-14 Andrew Llc Transceiver architecture and method for wireless base-stations
EP1885024A1 (fr) * 2006-08-03 2008-02-06 Selex Sensors and Airborne Systems Limited Antenne
US8384597B2 (en) 2006-10-16 2013-02-26 Telefonaktiebolaget Lm Ericsson (Publ) Tilt-dependent beam-shape system
WO2010035922A1 (fr) * 2008-09-26 2010-04-01 Kmw Inc. Antenne pour station de base d'un système de communication mobile
US10027036B2 (en) 2011-01-28 2018-07-17 Kathrein-Werke Kg Antenna array and method for synthesizing antenna patterns
US10701534B2 (en) 2018-07-30 2020-06-30 Nxp B.V. Message relaying in vehicle-to-vehicle communication system
EP3826105A4 (fr) * 2018-08-14 2021-08-04 Huawei Technologies Co., Ltd. Système d'antennes et station de base
US11671128B2 (en) 2018-08-14 2023-06-06 Huawei Technologies Co., Ltd. Antenna system and base station
EP3853948A4 (fr) * 2018-09-21 2022-06-15 HRL Laboratories LLC Antenne active à large bande
CN111740786A (zh) * 2020-06-10 2020-10-02 电子科技大学 一种集成光波导波束赋形装置

Also Published As

Publication number Publication date
EP0943164A1 (fr) 1999-09-22
AU4735797A (en) 1998-04-02
KR20000036179A (ko) 2000-06-26
JP2001500691A (ja) 2001-01-16
CA2265987A1 (fr) 1998-03-19

Similar Documents

Publication Publication Date Title
WO1998011626A1 (fr) Systeme d'antenne ameliorant la zone de couverture, la portee et la fiabilite de stations de base sans fil
CA2306650C (fr) Structure d'antenne et installation
US6621469B2 (en) Transmit/receive distributed antenna systems
US6043790A (en) Integrated transmit/receive antenna with arbitrary utilization of the antenna aperture
US7538740B2 (en) Multiple-element antenna array for communication network
US9761937B2 (en) Fragmented aperture for the Ka/K/Ku frequency bands
CN1150498A (zh) 微带天线阵列
CN113451742A (zh) 其中集成有高性能有源天线系统（aas）的基站天线
JP2000078072A (ja) 送受信装置
CN112332111B (zh) 一种双圆极化可扩展有源子阵
US11411301B2 (en) Compact multiband feed for small cell base station antennas
US10680346B2 (en) Antenna system with frequency dependent power distribution to radiating elements
WO2002039541A2 (fr) Systemes d'antennes distribues
KR100748337B1 (ko) 이중편파 다이버시티 능동형 마이크로스트립 배열 안테나
CN211045741U (zh) 阵列天线结构
MXPA99002531A (en) Antenna system for enhancing the coverage area, range and reliability of wireless base stations
US20230369782A1 (en) Mobile communication antenna
KR20020063777A (ko) Imt2000 및 pcs겸용 이중편파 다이버시티 능동형 기지국안테나

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZW AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH KE LS MW SD SZ UG ZW AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
ENP Entry into the national phase

Ref document number: 1998 513960

Country of ref document: JP

Kind code of ref document: A

Ref document number: 2265987

Country of ref document: CA

Kind code of ref document: A

Ref document number: 2265987

Country of ref document: CA

WWE Wipo information: entry into national phase

Country of ref document: MX

Ref document number: PA/a/1999/002531

Ref document number: 1019997002233

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 1997909849

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWP Wipo information: published in national office

Ref document number: 1997909849

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1019997002233

Country of ref document: KR

WWW Wipo information: withdrawn in national office

Ref document number: 1997909849

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1019997002233

Country of ref document: KR