EP3057179B1 - Antennensystem und basisstation - Google Patents

Antennensystem und basisstation Download PDF

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Publication number
EP3057179B1
EP3057179B1 EP14852403.6A EP14852403A EP3057179B1 EP 3057179 B1 EP3057179 B1 EP 3057179B1 EP 14852403 A EP14852403 A EP 14852403A EP 3057179 B1 EP3057179 B1 EP 3057179B1
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EP
European Patent Office
Prior art keywords
antenna array
radio frequency
antenna
antenna system
frequency module
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.)
Active
Application number
EP14852403.6A
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English (en)
French (fr)
Other versions
EP3057179A4 (de
EP3057179A1 (de
Inventor
Jianping Zhao
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.)
Huawei Technologies Co Ltd
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Huawei Technologies Co 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
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Publication of EP3057179A1 publication Critical patent/EP3057179A1/de
Publication of EP3057179A4 publication Critical patent/EP3057179A4/de
Application granted granted Critical
Publication of EP3057179B1 publication Critical patent/EP3057179B1/de
Active legal-status Critical Current
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/002—Antennas or antenna systems providing at least two radiating patterns providing at least two patterns of different beamwidth; Variable beamwidth antennas
    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • 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
    • H01Q21/061—Two dimensional planar 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

Definitions

  • the present invention relate to communications technologies, and in particular, to an antenna system and a base station.
  • an antenna supports multiple systems.
  • GSM Global System For Mobile Communications
  • UMTS Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • this antenna deployment technology can provide only narrow beam coverage, which cannot satisfy a requirement that an antenna system should provide both a wide beam and a narrow beam.
  • WO 01/01582 A2 discloses to install a sector antenna and an adaptive phased-array antenna for a cellular radio base station in a single antenna cartridge.
  • US 5 907 816 A discloses a high gain antenna system for cellular use.
  • the antenna system comprises a sector antenna and a multi-beam antenna, wherein the multi-bean antenna covers the same sector with a plurality of narrower beams.
  • WO 98/421 50 A2 also describes an antenna system comprising a first, second and a third antenna array.
  • the first and third antenna arrays each comprising a single column of antennas are placed on either side of the second antenna array which comprises several columns of antennas.
  • the present invention has as its object to provide an antenna system and a base station, to resolve a problem that close-spaced multi-column antennas can provide only a narrow beam, and to satisfy a requirement that an antenna system should provide both a wide beam and a narrow beam.
  • This object is solved by an antenna system of claim 1 and by a base station of claim 3. Further advantageous embodiments and improvements of the invention are listed in the dependent claims. Hereinafter, before coming to a detailed description of the embodiments, first some aspects of the invention are highlighted.
  • the present invention provides an antenna system, including: a first antenna array configured to form wide beam coverage and a second antenna array configured to form narrow beam coverage, where:
  • an interval between the first antenna array and the second antenna array is greater than a column interval of the second antenna array.
  • the antenna system further includes a multi-band combiner, where the multi-band combiner is connected to one of the at least one narrow beam port and/or one of the at least one the wide beam port.
  • one of the at least one narrow beam port is connected to one multi-band combiner; and one of the at least one wide beam port is connected to another multi-band combiner.
  • the present invention provides a base station, including: the antenna system according to the first aspect and at least one radio frequency module, where: the at least one radio frequency module is connected to the antenna system by using at least one wide beam port and/or at least one narrow beam port.
  • the at least one wide beam port is connected to one first radio frequency the other of the at least one wide beam port are connected to at least two third radio frequency modules by using the multi-band combiner, and the at least one narrow beam port is connected to the at least two third radio frequency modules by using a multi-band combiner.
  • the examples of the present invention provide an antenna system and a base station.
  • FIG. 1 is a schematic structural diagram of an antenna system according to a first example.
  • the antenna system 10 in this example may include: a first antenna array 11 and a second antenna array 12, where the first antenna array 11 is configured to form wide beam coverage, and the second antenna array 12 is configured to form narrow beam coverage.
  • the first antenna array 11 includes at least one column of antennas, where each column of antennas provide at least one wide beam port 112; the second antenna array 12 includes at least two columns of antennas, and the second antenna array 12 provides at least one narrow beam port 122.
  • FIG. 2 is an example of a schematic structural diagram of an antenna system according to the first example.
  • the antenna system 10 includes a first antenna array 11 and a second antenna array 12, where the first antenna array 11 includes one column of antennas 111 and provides a wide beam port 112; the second antenna array 12 includes four columns of antennas 121, and provides three narrow beam ports: 122a, 122b, and 122c. A narrow beam is led out through a narrow beam port.
  • FIG. 3 is a schematic diagram of a wide beam in an antenna system according to the first example.
  • a wide beam formed by one column of antennas 111 of the first antenna array 11 in FIG. 2 may cover a relatively large range.
  • FIG. 4 is a schematic diagram of a narrow beam in an antenna system according to the first example.
  • the four columns of antennas 121 of the second antenna array 12 in FIG. 2 form coverage of three narrow beams, which are respectively led out through the three narrow beam ports 122a, 122b and 122c of the second antenna array 12.
  • a coverage range of each narrow beam is less than a coverage range of a wide beam.
  • the second antenna array 12 splits a single beam into multiple beams to implement space division multiple access, thereby improving an antenna capacity.
  • the antenna system includes a first antenna array configured to form a wide beam and a second antenna array configured to form a narrow beam.
  • the first antenna array includes at least one column of antennas, where each column of antennas provide at least one wide beam port; the second antenna array includes at least two columns of antennas, and the second antenna array provides at least one narrow beam port.
  • the wide beam formed by the antenna system is led out through the at least one wide beam port, and the narrow beam formed by the antenna system is led out through the at least one narrow beam port.
  • FIG. 5 is a schematic structural diagram of an antenna system according to a second example.
  • an isolation apparatus 21 is disposed between the first antenna array 11 and the second antenna array 12, where the isolation apparatus 21 is configured to reduce mutual coupling between the first antenna array 11 and the second antenna array 12, thereby ensuring beam quality of a wide beam.
  • the isolation apparatus 21 may be an isolation wall or an isolation plate, which is not specifically limited in this example.
  • a column interval of the first antenna array 11 is greater than the column interval of the second antenna array 12.
  • the first antenna array forms wide beam coverage by setting a column interval of multiple columns of antennas of a first antenna array to be greater than a column interval of a second antenna array.
  • a greater column interval of the first antenna array may reduce interference between the columns of antennas that provide the wide beam coverage.
  • FIG. 6 is a schematic structural diagram of an antenna system according to a third example.
  • the antenna system 10 according to this example may further include a multi-beam forming device 31, where the multi-beam forming device 31 is connected to the second antenna array 12, the second antenna array 12 forms at least one narrow beam by using the multi-beam forming device 31, and the at least one narrow beam is led out through the narrow beam port 122.
  • the second antenna array 12 is configured to form coverage of a narrow beam, where a specific direction, a specific coverage area, a specific quantity of beams, and the like of the narrow beam may be controlled by the multi-beam forming device 31.
  • the multi-beam forming device 31 may adjust parameters such as a phase and an amplitude of an antenna array, thereby forming coverage of multiple narrow beams.
  • a multi-beam forming device is integrated into an antenna system, and no multi-beam forming device needs to be additionally configured for the antenna system; therefore, a function of forming wide and narrow beams by the antenna system becomes more intelligent.
  • a wide beam is led out through a wide beam port and a narrow beam is led out through a narrow beam port, so that the antenna system can provide only a wide beam or only a narrow beam as required, or provide both a wide beam and a narrow beam.
  • FIG. 7 is a schematic structural diagram of an antenna system according to a fourth example.
  • the antenna system 10 according to this example may further include a multi-band combiner 41, where the multi-band combiner 41 is connected to a wide beam port and/or a narrow beam port, and the antenna system 10 combines signals of different frequency bands into a mixed signal by using the multi-band combiner 4 or divides the mixed signal into the signals of the different frequency bands.
  • the multi-band combiner 41 may combine signals of different frequency bands into a mixed signal, or divide the mixed signal into the signals of the different frequency bands, so that the antenna system can perform processing on the signals of the different frequency bands simultaneously.
  • the antenna system can combine a signal of a frequency band supported by a GSM system and a signal of a frequency band supported by an LTE system, and feed a combined signal into the antenna system, thereby implementing processing of the two signals of the different frequency bands by the antenna system.
  • a multi-band combiner is integrated into an antenna system, and a port for transmitting a mixed signal is directly provided for a radio frequency module, thereby simplifying a connection structure between the antenna system and the radio frequency module.
  • the multi-band combiner 41 may be integrated into the antenna system and serve as a component of the antenna system, or may not be integrated into the antenna system, but serve as an independent structure, and be connected to the antenna system 10, which is not specifically limited herein.
  • FIG. 8 is a schematic structural diagram of a base station according to a first example.
  • a base station of this example includes an antenna system 10 and at least one radio frequency module 20, where the antenna system 10 may use a structure of any one of the antenna system examples in FIG. 1 to FIG. 7 (except FIG. 3 and FIG. 4 ), and the radio frequency module 20 is connected to the antenna system 10 by using at least one wide beam port and/or at least one narrow beam port.
  • the following describes in detail the structure of the base station in the example shown in FIG. 8 .
  • FIG. 9 is a schematic structural diagram of a base station according to a second example.
  • the antenna system 10 includes a first antenna array 11 and a second antenna array 12, where the first antenna array 11 includes one column of antennas 111a and another column of antennas 111b, the column of antennas 111a provides a wide beam port 112a, and the column of antennas 111b provides a wide beam port 112b; the second antenna array 12 includes four columns of antennas 121, and provides three narrow beam ports 122a, 122b, and 122c, where three narrow beams formed by the second antenna array 12 are led out through the narrow beam ports 122a, 122b, and 122c, respectively.
  • the antenna system is connected to a first radio frequency module by using a wide beam port.
  • a connection manner may be that a wide beam port is connected to one first radio frequency module, or that a wide beam port is connected, by using a multi-band combiner, to two or more first radio frequency modules that support different frequency bands.
  • a first radio frequency module is connected to a wide beam port; therefore, the first radio frequency module is a radio frequency module that supports a wide beam.
  • there are three first radio frequency modules that support different frequency bands which are a first radio frequency module 21 that supports a frequency band 1, a first radio frequency module 22 that supports a frequency band 2, and a first radio frequency module 23 that supports a frequency band 3, respectively.
  • the wide beam port 112a is connected to the first radio frequency module 21 that supports the frequency band 1 and the first radio frequency module 22 that supports the frequency band 2 by using a multi-band combiner 40, and the other wide beam port 112b is connected to the first radio frequency module 23 that supports the frequency band 3.
  • the column of antennas 111a can receive and send a mixed signal obtained by combining a signal of the frequency band 1 and a signal of the frequency band 2, the column of antennas 111b can receive and send a signal of the frequency band 3, where the frequency band 1, the frequency band 2, and the frequency band 3 herein may be any communication frequency band, which is not specifically limited herein.
  • the antenna system can provide coverage of wide beams of different frequency bands, and a coverage range of the wide beams may be a range shown in FIG. 3 .
  • FIG. 10 is a schematic structural diagram of a base station according to a third example.
  • an antenna system 10 includes a first antenna array 11 and a second antenna array 12, where the first antenna array 11 includes one column of antennas 111a and another column of antennas 111b, the column of antennas 111a provides a wide beam port 112a, and the column of antennas 111b provides a wide beam port 112b; the second antenna array 12 includes four columns of antennas 121, and provides three narrow beam ports 122a, 122b, and 122c, where three narrow beams formed by the second antenna array 12 are led out through the narrow beam ports 122a, 122b, and 122c, respectively.
  • the antenna system is connected to a second radio frequency module by using a wide beam port.
  • a connection manner may be that a narrow beam port is connected to one second radio frequency module, or that a narrow beam port is connected, by using a multi-band combiner, to two or more second radio frequency modules that support different frequency bands.
  • a second radio frequency module is connected to a narrow beam port; therefore, the second radio frequency module is a radio frequency module that supports a narrow beam.
  • there are three second radio frequency modules that support different frequency bands which are a second radio frequency module 31 that supports a frequency band 1, a second radio frequency module 32 that supports a frequency band 2, and a second radio frequency module 33 that supports a frequency band 3, respectively.
  • the narrow beam port 122a is connected to the second radio frequency module 31 that supports the frequency band 1, the second radio frequency module 32 that supports the frequency band 2, and the second radio frequency module 33 that supports the frequency band 3 by using a multi-band combiner 40a
  • the narrow beam port 122b is connected to the second radio frequency module 31 that supports the frequency band 1, the second radio frequency module 32 that supports the frequency band 2, and the second radio frequency module 33 that supports the frequency band 3 by using a multi-band combiner 40b
  • the narrow beam port 122c is connected to the second radio frequency module 31 that supports the frequency band 1, the second radio frequency module 32 that supports the frequency band 2, and the second radio frequency module 33 that supports the frequency band 3 by using a multi-band combiner 40c.
  • the second antenna array 12 can receive and send a mixed signal obtained by combining a signal of the frequency band 1, a signal of the frequency band 2, and a signal of the frequency band 3, where the frequency band 1, the frequency band 2, and the frequency band 3 herein may be any communication frequency band, which is not specifically limited herein.
  • the antenna system can provide coverage of narrow beams of different frequency bands, and a coverage range of the narrow beams may be a range shown in FIG. 4 .
  • FIG. 11 is a schematic structural diagram of a base station according to a first embodiment of the present invention.
  • an antenna system 10 includes a first antenna array 11 and a second antenna array 12, where the first antenna array 11 includes one column of antennas 111a and another column of antennas 111b, the column of antennas 111a provides a wide beam port 112a, and the column of antennas 111b provides a wide beam port 112b; the second antenna array 12 includes four columns of antennas 121, and provides three narrow beam ports 122a, 122b, and 122c, where three narrow beams formed by the second antenna array 12 are led out through the narrow beam ports 122a, 122b, and 122c, respectively.
  • Both a wide beam port and a narrow beam port of the antenna system are connected to a third radio frequency module.
  • a connection manner may be that both a wide beam port and a narrow beam port are connected to one third radio frequency module, or that a wide beam port is connected, by using a multi-band combiner, to two or more third radio frequency modules that support different frequency bands, and a narrow beam port is connected, by using a multi-band combiner, to the foregoing two or more third radio frequency modules that support the different frequency bands.
  • a third radio frequency module is connected to both a wide beam port and a narrow beam port; therefore, the third radio frequency module is a radio frequency module that supports both a wide beam and a narrow beam. As shown in FIG.
  • third radio frequency modules that support different frequency bands, which are a third radio frequency module 41 that supports a frequency band 1, a third radio frequency module 42 that supports a frequency band 2, and a third radio frequency module 43 that supports a frequency band 3.
  • the wide beam port 112a is connected to the third radio frequency module 41 that supports the frequency band 1
  • the other wide beam port 112b is connected to the third radio frequency module 42 that supports the frequency band 2 and the third radio frequency module 43 that supports the frequency band 3 by using a multi-band combiner 40a
  • the narrow beam port 122a is connected to the third radio frequency module 41 that supports the frequency band 1 and the third radio frequency module 42 that supports the frequency band 2 by using a multi-band combiner 40b
  • the other two narrow beam ports 122b and 122c are both connected to the third radio frequency module 43 that supports the frequency band 3.
  • the column of antennas 111a can receive and send a signal of the frequency band 1, and the column of antennas 111b may receive and send a mixed signal obtained by combining a signal of the frequency band 2 and a signal of the frequency band 3, where the frequency band 1, the frequency band 2, and the frequency band 3 may be any communication frequency band, which is not specifically limited herein.
  • the antenna system can provide coverage of wide beams of different frequency bands, and both the third radio frequency module 41 that supports the frequency band 1 and the third radio frequency module 42 that supports the frequency band 2 are connected to the narrow beam port 122a; therefore, a coverage range of wide and narrow beams provided by the antenna system to the two third radio frequency modules may be a range shown in FIG. 12 .
  • FIG. 12 is a schematic diagram of a wide/narrow beam 1 according to the embodiment of the present invention.
  • the third radio frequency module 42 that supports the frequency band 3 is connected to both the narrow beam ports 122b and 122c; therefore, a coverage range of wide and narrow beams provided by the antenna system to the third radio frequency module may be a range shown in FIG. 13 .
  • a wide beam provides a larger coverage area, and narrow beams led out through the narrow beam ports 122b and 122c provide key area coverage.
  • FIG. 13 is a schematic diagram of a wide/narrow beam 2 according to the embodiment of the present invention.
  • the program may be stored in a computer-readable storage medium.
  • the foregoing storage medium includes: any medium that can store program code, such as a ROM, a RAM, a magnetic disk, or an optical disc.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Mobile Radio Communication Systems (AREA)

Claims (4)

  1. Antennensystem (10), das Folgendes umfasst:
    1.1 ein erstes Antennenarray (11), das dazu ausgelegt ist, eine Breitstrahlabdeckung zu bilden, und
    1.2 ein zweites Antennenarray (12), das dazu ausgelegt ist, eine Schmalstrahlabdeckung zu bilden, wobei:
    1.3 das erste Antennenarray (11) eine erste und eine zweite benachbarte Spalte von Antennen (lila, 111b) umfasst, wobei die erste und die zweite Spalte von Antennen einen ersten und einen zweiten Breitstrahlanschluss (112a, 112b) bereitstellt; und
    1.4 das zweite Antennenarray (12) eine erste bis vierte benachbarte Spalte von Antennen (121) umfasst und das zweite Antennenarray drei Schmalstrahlanschlüsse (122a, 122b, 122c) bereitstellt, wobei
    1.5 ein Spaltenintervall des ersten Antennenarrays (11) größer ist als ein Spaltenintervall des zweiten Antennenarrays (12) ist und
    1.6 wobei ein Intervall zwischen dem ersten Antennenarray (11) und dem zweiten Antennenarray (12) größer ist als das Spaltenintervall des zweiten Antennenarrays (12); wobei
    1.7 die zweite Spalte (111b) des ersten Antennenarrays (11) der ersten Spalte des zweiten Antennenarrays (12) benachbart ist;
    1.8 das Antennensystem ferner ein erstes, ein zweites und ein drittes Funkfrequenzmodul (41, 42, 43), die verschiedene Frequenzbänder 1, 2 und 3 unterstützen, und einen ersten und einen zweiten Mehrbandkombinierer (40b, 40a) umfasst, wobei
    1.8.1 der erste Breitstrahlanschluss (112a) mit dem ersten Funkfrequenzmodul (41) verbunden ist und der zweite Breitstrahlanschluss (112b) unter Verwendung des ersten Kombinierers (40a) mit dem zweiten Funkfrequenzmodul (42) und dem dritten Funkfrequenzmodul (43) verbunden ist;
    1.8.2 der erste Schmalstrahlanschluss (122a) unter Verwendung des zweiten Mehrbandkombinierers (40b) mit dem ersten Funkfrequenzmodul (41) und dem zweiten Funkfrequenzmodul (42) verbunden ist und
    1.8.3 der zweite und der dritte Schmalstrahlanschluss (122b, 122c) beide mit dem dritten Funkfrequenzmodul (43) verbunden sind.
  2. Antennensystem (10) nach Anspruch 1, wobei zwischen dem ersten Antennenarray (11) und dem zweiten Antennenarray (12) eine Isoliervorrichtung (21) angeordnet ist.
  3. Basisstation, die das Antennensystem (10) nach einem der Ansprüche 1 bis 2 und mindestens ein Funkfrequenzmodul (20) umfasst.
  4. Antennensystem nach Anspruch 1, wobei das Schmalstrahlstrahlungsmuster (122b, 122c) innerhalb der Grenze des Breitstrahlstrahlungsmusters liegt.
EP14852403.6A 2013-10-12 2014-08-13 Antennensystem und basisstation Active EP3057179B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310477365.9A CN104577356B (zh) 2013-10-12 2013-10-12 天线系统和基站
PCT/CN2014/084275 WO2015051668A1 (zh) 2013-10-12 2014-08-13 天线系统和基站

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EP3057179A1 EP3057179A1 (de) 2016-08-17
EP3057179A4 EP3057179A4 (de) 2016-10-19
EP3057179B1 true EP3057179B1 (de) 2019-04-03

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WO (1) WO2015051668A1 (de)

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US10431877B2 (en) * 2017-05-12 2019-10-01 Commscope Technologies Llc Base station antennas having parasitic coupling units
CN107294572B (zh) * 2017-07-12 2020-06-09 西安空间无线电技术研究所 一种大规模多波束的快速布站方法
CN110994203B (zh) * 2019-11-25 2022-04-01 广东博纬通信科技有限公司 一种宽频混合多波束阵列天线
EP4409685A1 (de) * 2021-09-30 2024-08-07 Poynting Antennas (Pty) Limited Drahtloses kommunikationssystem für ein wasserfahrzeug
EP4307574A1 (de) * 2022-07-12 2024-01-17 Nokia Technologies Oy Verfahren, vorrichtungen und system zur ausrichtung von nr-strahlen

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WO1998042150A2 (en) * 1997-03-14 1998-09-24 At & T Corp. Downlink smart antennas for is-54/is-136 tdma systems

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US5684491A (en) * 1995-01-27 1997-11-04 Hazeltine Corporation High gain antenna systems for cellular use
WO2001001582A2 (en) * 1999-04-29 2001-01-04 Telefonaktiebolaget Lm Ericsson (Publ) Integrated adaptive phased arrays and sector antennas
CN100455075C (zh) * 2003-06-05 2009-01-21 中兴通讯股份有限公司 空间多波束馈电网络的实现装置
CN1985187B (zh) * 2004-07-16 2012-05-16 富士通天株式会社 单脉冲雷达装置及天线切换开关
CN201233956Y (zh) * 2008-07-25 2009-05-06 中国电子科技集团公司第五十四研究所 天线快速对准装置
CN101562817A (zh) * 2009-05-25 2009-10-21 北京理工大学 一种基于天线波束交叠的中继传输方法

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Publication number Priority date Publication date Assignee Title
WO1998042150A2 (en) * 1997-03-14 1998-09-24 At & T Corp. Downlink smart antennas for is-54/is-136 tdma systems

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Publication number Publication date
CN104577356B (zh) 2018-05-29
EP3057179A4 (de) 2016-10-19
WO2015051668A1 (zh) 2015-04-16
CN104577356A (zh) 2015-04-29
EP3057179A1 (de) 2016-08-17

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