WO2013040746A1 - Système d'antenne partagée - Google Patents

Système d'antenne partagée Download PDF

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Publication number
WO2013040746A1
WO2013040746A1 PCT/CN2011/079841 CN2011079841W WO2013040746A1 WO 2013040746 A1 WO2013040746 A1 WO 2013040746A1 CN 2011079841 W CN2011079841 W CN 2011079841W WO 2013040746 A1 WO2013040746 A1 WO 2013040746A1
Authority
WO
WIPO (PCT)
Prior art keywords
band
network
ports
layer
antenna system
Prior art date
Application number
PCT/CN2011/079841
Other languages
English (en)
Inventor
Yong Ding
Xiaochun Gao
Zhonglin Wu
Wen Lu
Xiangya FU
Jianhua Xie
Lihua Zhang
Original Assignee
Tongyu Communication 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 Tongyu Communication Inc. filed Critical Tongyu Communication Inc.
Priority to PCT/CN2011/079841 priority Critical patent/WO2013040746A1/fr
Publication of WO2013040746A1 publication Critical patent/WO2013040746A1/fr

Links

Classifications

    • 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
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/062—Two dimensional planar arrays using dipole aerials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • 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

Definitions

  • the present invention relates to base station antennas for wireless communications, and especially to a shared antenna system for multiple wireless communication networks.
  • the traditional second generation (2G) wireless communication networks is well developed, and the third generation (3G) wireless communication network is widely constructing in the world.
  • the 3G+(beyond 3G) wireless communication network such as Long Term Evolution (LTE)
  • LTE Long Term Evolution
  • each kind of wireless communication network employs an independent antenna in Base Station, it will increase the difficulty to search the Base Station site, and increase the cost to build the Base Station.
  • the Base Station tower will be larger to support more antennas which have a significant visual impact to the environment.
  • a main object of the present invention is to provide a shared antenna system for different wireless communication networks, of which the electrical tilt can be controlled independently, and the size of the antenna system is minimized.
  • a shared antenna system which comprises a radome, a metal reflector, a radiator array layer mounting above the metal reflector, and a feeding network associated with the radiator array layer.
  • the radiator array layer comprises a plurality of radiators at least operating for band A of a first telecommunication system and band B of a second telecommunication.
  • the feeding network comprises duplexer network, phase compensating network, phase shifting network, and power splitting network.
  • signals from radiators are divided by the duplexer network into a first RF signal for band A and a second RF signal for band B, respectively.
  • the compensating network and phase shifting network are used to independently control the electrical tilts of the first and second RF signals, respectively.
  • Two sets of RF signals are respectively splitted to RF ports of band A and band B by the splitting network.
  • the duplexer network comprises a plurality of duplexers D arranged as a duplexer layer. Between the radiators and the duplexers are power splitters S which are used for combining signals from radiators and then outputting to the duplexers.
  • the radiators are arranged as a plurality of radiator arrays, and in each array, signals from every two or more radiators are combined in a splitter S and outputted to a duplexer, finally being divided into the first RF signal for band A and the second RF signal for band B.
  • the power splitting network comprises a plurality of splitters SI for splitting the first RF signals and a plurality of splitters S2 for splitting the second RF signals.
  • the phase shifting network at least comprises a plurality of phase shifters PI arranged as a first phase shifting layer to compose electrical tilt for band A.
  • the phase compensating network is connected between the power splitting network and the duplexer network.
  • the power splitters S are arranged as a first power splitting layer.
  • the phase compensating network and the first power splitting layer are integrated into a complex layer which is positioned below the metal reflector.
  • the phase shifting network further comprises a plurality of phase shifters P2 arranged as a second phase shifting layer to compose electrical tilt for band B.
  • the electrical tilt for band A of the first telecommunication system is adjustable; but the electrical tilt for band B of the second telecommunication is preset as a fixed value.
  • the shifters PI are associated with splitters SI for shifting and splitting RF signals of band A out from duplexers D to RF ports of band A
  • the shifters P2 are associated with splitters S2 for shifting and splitting RF signals of band B out from duplexers D to RF ports of band B.
  • the power splitting network is arranged in the complex layer as well.
  • the first phase shifting layer is located below the complex layer and above the second phase shifting layer, and the second phase shifting layer is positioned above the duplexer layer.
  • the complex layer, first phase shifting layer, second phase shifting layer, and duplexer layer are respectively connected via feeding pillars with a metal plate inserted between different layers.
  • the shifters PI are respectively associated with splitters SI for shifting and splitting RF signals of band A out from duplexers D to RF ports of band A.
  • the splitters S 1 of the splitting network are arranged in the complex layer as well, but only the splitters S2 are associated with duplexers D for splitting RF signals of band B from duplexers D to RF ports of band B, and being arranged in a second power splitting layer which replaces the second phase shifting layer relative to the first embodiment.
  • radiators in each radiator array there are eleven radiators in each radiator array, signals from every two or three radiators are combined via a splitter S and output to a duplexer D for being divided into the first RF signal of band A and the second RF signal of band B, respectively.
  • the feeding network further comprises: calibration network for calibrating RF signal between RF ports and base station; controlling module which comprises Remote Control Unit (RCU); and mechanical driving network which comprises link bars respectively connecting phase shifters PI and phase shifters P2, and driving elements are connected to the end of the link bars.
  • controlling module which comprises Remote Control Unit (RCU)
  • mechanical driving network which comprises link bars respectively connecting phase shifters PI and phase shifters P2, and driving elements are connected to the end of the link bars.
  • the calibration network is performed via calibration ports for band A and band B.
  • RCU is performed via RCU ports or calibration ports.
  • the calibration ports, RCU ports, and RF ports are respectively configured or integrated as connectors, such as any kind of common connector, cluster connector, or Blind Mounting Accessory (BMA).
  • BMA Blind Mounting Accessory
  • the connectors may be positioned at a bottom end or on back cover of the antenna system.
  • the controlling module further comprises one or more turn knobs for adjusting electrical tilt by hands, and also comprises controlling circuit, driving motor, and Modem associated with the RCU.
  • the band A is in a frequency range but not limited to that from 1880MHz to 2025MHz
  • band B is in a frequency range but not limited to that from 2500MHz to 2690MHz.
  • the first and second telecommunication systems may be 2G, 3G or 3G+ telecommunication systems, and preferably are TD-SCDMA and TD-LTE system.
  • FIG. 1 is a side view of a shared antenna system in accordance with a first embodiment of the present invention
  • FIG. 2 is a sectional view of the antenna system in FIG. 1 ;
  • FIG. 3 is a cross-section from anther view of the antenna system in FIG. l ;
  • FIG. 4 is a partial, perspective view of the antenna system in FIG. 1 ;
  • FIG. 5 is a partial, perspective view of the antenna system in FIG. 1 in a varied implement relative to FIG. 4;
  • FIG. 6 is a schematic diagram of the topological structure of a feed network of the antenna system in FIG. 1 ;
  • FIG. 7 is a plan view of duplexer arrangement of the antenna system in FIG. 1 ;
  • FIG. 8 is a perspective view of a radiator of the antenna system in FIG. 1 ;
  • FIG. 9 is a perspective view of a feeder pillar of the antenna system in FIG. 1 ;
  • FIG. 10 is a sectional view of the antenna system in accordance with a second embodiment
  • FIG. 11 is a partial, perspective view of the antenna system in FIG. 10;
  • FIG. 12 is a partial, perspective view of the antenna system in FIG. 10 in a varied implement relative to FIG. 11 ;
  • FIG. 13 is a schematic diagram of the topological structure of a feed network of the antenna system in FIG. 10.
  • a shared antenna system 100 in accordance the first embodiment comprises a radome 13, radiator array layer 14, metal reflector 15, and a feeding network associated with the radiator array layer 14.
  • the radiator array layer 14 is mounted on the reflector 15, and the feeding network is located below the reflector 15 for feeding radiator arrays.
  • the radiator array layer 14 is connected to the feeding network via feeding cables which pass through the metal reflector 15.
  • the radiator array layer 14 comprises a plurality of radiator arrays. Each array has a plurality of radiators 23.
  • the radiator 23 is dual polarized, and operates for two telecommunication systems. As an illustrative embodiment, there are four radiator arrays with eleven radiators 23 in each array.
  • Each radiator 23 is relevant to two different telecommunication system, for example, the first telecommunication system is TD-SCDMA system in band A, and the second telecommunication system is TD-LTE system in band B. Therefore, band A is in a frequency range from 1880 to 2025MHz, and band B is in a frequency range from 2500 to 2690MHz.
  • the radiators 23 can also be arranged as three arrays or any arrays, and the radiators in each array are not limited to eleven but preferably more than two.
  • the structure of the radiator 23 may be configured as shown in FIG. 8, which is disclosed in Chinese Patent application No. 201010581310.9.
  • the radiator 23 comprises two pairs of dipoles 04 which are placed orthogonally to each other to form dual polarization.
  • a feeder of the radiator 23 comprises stimulant metal sheets 05, 06 and balun 02.
  • the dipole 04 has a shape of 90 degree of circular sector, and is hollowed out.
  • a loaded line 03 is radially formed in the hollowed-out dipole 04 and directed to a center of the dipole square.
  • the dipoles 04 with loaded lines 03 and the balun 02 are manufactured preferably via an integral process, and the dipole square is placed orthogonally to the balun 02.
  • other radiator is also applicable which should operate at least in two telecommunication systems, such as 3G (TD-SCDMA) and 3G+ (TD-LTE) systems.
  • the radiator is broadband and dual-polarized.
  • the feeding network comprises: a plurality of power splitters S arranged in a first power splitting layer, duplexer network, phase compensating network, power splitting network, phase shifting network, calibration network, mechanical driving network, controlling module, and RF ports respectively for band A and band B.
  • signals from radiators are combined in splitters S and then divided by the duplexer network into two sets of RF signals which comprises a first RF signal for band A and a second RF signal for band B, respectively.
  • compensating network and phase shifting network are used to independently control electrical tilts for different systems.
  • Two sets of RF signals are splitted to RF ports of band A and RF ports of band B by the splitting network, respectively.
  • the duplexer network comprises a plurality of duplexers D arranged as a duplexer layer 19, and the duplexers D are respectively associated with power splitter S.
  • the phase compensating network is connected between the power splitting network and the duplexer network.
  • the first power splitting layer and phase compensation network is integrated into a complex layer 16 for minimizing size of the antenna system.
  • the phase shifting network comprises a plurality of phase shifters PI arranged in a first phase shifting layer 17 for adjusting electrical tilt of band A, a plurality of phase shifters P2 arranged in a second phase shifting layer 18 for adjusting the electrical tilt for band B of the second telecommunication system.
  • the electrical tilts for band A and band B are independently adjustable.
  • the power splitting network comprises a plurality of splitters SI for splitting the first RF signals and a plurality of splitters S2 for splitting the second RF signals, which are arranged in the complex layer 16 in the first embodiment.
  • the shifters PI are associated with splitters SI for shifting and splitting RF signals of band A out from duplexers D to RF ports of band A
  • the shifters P2 are associated with splitters S2 for shifting and splitting RF signals of band B out from duplexers D to RF ports of band B.
  • the complex layer 16 is positioned below the reflector 15, and the first phase shifting layer 17 for band A is positioned below the complex layer 16.
  • the second phase shifting layer 18 for band B is positioned below the first phase shifting layer 17 but above the duplexer layer 19.
  • the complex layer 16, the first phase shifting layer 17, the second phase shifting layer 18, and the duplexer layer 19 are respectively connected via feeding pillars 22 as shown in FIG. 2, and metal plates may be inserted between layers 16, 17, 18, 19.
  • the mechanical driving network comprises link bars 20, 20' respectively connecting to shifters PI and shifters P2, and driving elements 21, 21 ' respectively connecting to an end of each link bar 20, 20'.
  • the calibration network calibrates signals between the RF ports of the antenna system and the base station via calibration port(s).
  • the controlling module comprises Remote Control Unit (RCU) which performs via RCU ports or calibration ports, and may selectively comprises turn knobs 11, 11 ' for independently adjusting electrical tilt of band A and band B by hands.
  • RCU Remote Control Unit
  • the link bar 20, the driving elements 21, and the turn knobs 11 work for the first telecommunication system; and the link bar 20', the driving elements 21 ', and the turn knobs 11 ' work for the second telecommunication system, which will be arranged in the same way when the antenna system operates for multiple telecommunication system.
  • the RF ports, calibration ports may be arranged as connectors, such as cluster connectors 7-8, and 7'-8' .
  • the RCU is performed via RCU ports arranged as connectors as well, such as two pairs of RCU connectors 9-10, 9'- 10', which further work as cascade connection between different base station antennas.
  • the antenna system 100 comprises four array of dual-polarized radiators 23 for band A and band B, and each array has eleven radiators.
  • Each array of radiators defines four RF ports, namely, two RF ports for band A, and the others for band B. Therefore, there are eight RF ports for the first telecommunication system and eight RF ports for the second telecommunication system, which are respectively arranged as two pairs of cluster connectors 7-8, 7'-8' respectively for band A and band B.
  • the cluster connectors 7, 7' respectively have four pins
  • the cluster connectors 8, 8' respectively have five pins with one pin for the calibration port.
  • the RCU connectors 9-10, 9'-10' respectively have eight pins and satisfy IEC60130-9 standard and work for band A and band B.
  • the RCU is performed via the calibration ports 8, 8', therefore, the RCU connectors will be set as shown in FIG. 5.
  • the pins of the connectors will be varied according to the polarization type of the radiators 23 in the same array or the number of radiator arrays.
  • the RF ports, calibration ports, and RCU ports may be designed or combined as various kinds of connectors as known to the skilled.
  • FIG. 6 illustrates how the antenna system 100 works via taking one radiator array as example.
  • Each radiator array comprises eleven radiators 23 arranged as five groups, and each group has two or three radiators 23.
  • Signals from radiators 23 in the same group are combined in a power splitter S associated therewith, then the combined signal outlets from the splitter S and is transmitted to a duplexer D, thus the signal is divided into two sets of RF signals via the duplexer D.
  • a first RF signal is relevant to TD-SCDMA system at a frequency range from 1880 to 2025MHz (band A)
  • a second RF signal is relevant to TD-LTE system at a frequency range from 2500 to 2690MHz (band B).
  • both sets of RF signals are respectively inputted to corresponding phase compensating network and phase shifting network. Therefore, under the performance of the controlling module, the electrical tilt of the first RF signal for band A and the second RF signal for band B are independently adjusted.
  • the RF signals of band A from duplexers D are shifted through phase shifters PI, split via splitters SI, and transmitted in RF ports of band A. it is the same as for RF signals of band B.
  • the feeding pillar 22 may be configured as shown in FIG. 9, which is disclosed in Chinese Patent application No. 201010559252.X.
  • the duplexers D may be in a kind of one inlet and two outlets, and separately arranged one by one, or every two duplexers are arranged side by side as shown in FIG. 7. Herein, each duplexer D is shielded and then covered by metal mask.
  • FIGS 10-13 illustrate the second embodiment of the antenna system 100 for two telecommunication system, such as 3G, and 3G+.
  • the electrical tilt for band A of the first telecommunication system is adjustable, but the electrical tilt for band B of the second telecommunication system is preset as a fixed tilt value.
  • the first telecommunication system is TD-SCDMA
  • the second telecommunication system is TD- LTE. It is understood that the first system and the second system can be exchangeable.
  • the shifters PI are respectively associated with splitters SI for shifting and splitting RF signals of band A out from duplexers D to RF ports of band A.
  • the splitters SI of the splitting network are arranged in the complex layer 16 as well, however only the splitters S2 but without any shifters P2 are associated with duplexers D for splitting RF signals of band B out from duplexers D to RF ports of band B.
  • the splitters S2 are arranged in a second power splitting layer 24 which substantially replaces the second phase shifting layer 18 relative to the first embodiment of FIGS 1-9. Accordingly, the feeding network has no phase shifters P2 for band B of the second telecommunication system, but the splitters are equal to the first embodiment.
  • the mechanical driving network only comprises bar link 20 for associating shifters PI, and driving element 21 at the end of the bar link 20.
  • the controlling module only comprises RCU ports 9, 10, and turning knob 11 for controlling tilt adjustment for band A. Therefore, only the electrical tilt for band A is adjustable, and the electrical tilt for band B is fixed, and also, the electrical tilts for band A and band B can be independently controlled.
  • the RCU is performed from the calibrating port 8. Therefore, no RCU ports 9, 10 are necessary as shown in FIG. 12.
  • the controlling module can further comprise controlling circuit, driving motor, and Modem associated with the RCU.
  • the RF ports and calibration ports can be set at a bottom end of the antenna system 100 as shown in FIGS 4-5, 11-12.
  • the RF ports for band A and calibration port thereof are set at bottom end of the antenna system 100 arranged as any kind of existing connectors; on the other hand, the RF ports for the band B and calibration port thereof are set on back cover of the antenna system 100 arranged as Blind Mounting Accessory BMA.
  • the position or type of RF ports and calibration port for band A can be exchanged with RF ports and calibration port for band B.
  • the antenna system 100 of the present invention operating for two telecommunication systems and independently control the electrical tilt for both systems, such both telecommunication systems includes but not limited to TD-SCDMA and TD-LTE, GSM900 and DCS 1800 (Distributed Control System), WCDMA2100 and GSM900, CDMA800 and CDMA2000.
  • TD-SCDMA and TD-LTE Global System for Mobile Communications
  • GSM900 and DCS 1800 Distributed Control System
  • WCDMA2100 and GSM900 CDMA800 and CDMA2000.
  • the invention allows the radiators and feeding network shared for multiple telecommunication systems. Due to the compact phase- shifter PI with or without P2 that allows variable electrical downtilt, the downtilt is independent for the two operating bands of the radiators 23. This allows maximum flexibility in optimization of cell coverage for two different systems. Furthermore, the Base Station is downsized for the perfect environment.

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

Abstract

L'invention concerne un système d'antenne partagée (100) comprenant un radôme (13), un réflecteur métallique (15), une couche de réseau d'éléments rayonnants (14) montée au-dessus du réflecteur métallique et un réseau d'alimentation associé à la couche de réseau d'éléments rayonnants. La couche de réseau d'éléments rayonnants comprend une pluralité d'éléments rayonnants (23) intéressant un premier et un second système de télécommunication. Le réseau d'alimentation comprend un réseau duplexeur, un réseau de compensation de phase, un réseau de déphasage et un réseau de division de puissance. Des signaux provenant des éléments rayonnants sont divisés par le réseau duplexeur en un premier signal RF pour la bande A et un second signal RF pour la bande B, alors que les pentes électriques des deux signaux sont commandées indépendamment par le réseau de compensation et le réseau de déphasage. Deux signaux RF sont divisés respectivement entre des ports RF de la bande A et de la bande B par le réseau de division. Le système d'antenne selon la présente invention peut commander indépendamment la pente électrique de la bande A et de la bande B et sa taille est réduite au minimum.
PCT/CN2011/079841 2011-09-19 2011-09-19 Système d'antenne partagée WO2013040746A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/079841 WO2013040746A1 (fr) 2011-09-19 2011-09-19 Système d'antenne partagée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/079841 WO2013040746A1 (fr) 2011-09-19 2011-09-19 Système d'antenne partagée

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WO2013040746A1 true WO2013040746A1 (fr) 2013-03-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107302137A (zh) * 2016-04-15 2017-10-27 安弗施无线射频系统（上海）有限公司 多远程电调装置、多频天线装置和双极化电调智能天线装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1795581A (zh) * 2003-04-02 2006-06-28 昆特尔科技有限公司 具有可变电倾角的相控阵天线系统
CN101192707A (zh) * 2007-12-03 2008-06-04 中国移动通信集团广东有限公司 一种电调定向智能天线
CN102082326A (zh) * 2009-11-26 2011-06-01 中国移动通信集团公司 一种支持异系统独立电调的智能天线设备及方法
CN201975512U (zh) * 2011-01-19 2011-09-14 东莞市晖速天线技术有限公司 错位阵列电调基站天线

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1795581A (zh) * 2003-04-02 2006-06-28 昆特尔科技有限公司 具有可变电倾角的相控阵天线系统
CN101192707A (zh) * 2007-12-03 2008-06-04 中国移动通信集团广东有限公司 一种电调定向智能天线
CN102082326A (zh) * 2009-11-26 2011-06-01 中国移动通信集团公司 一种支持异系统独立电调的智能天线设备及方法
CN201975512U (zh) * 2011-01-19 2011-09-14 东莞市晖速天线技术有限公司 错位阵列电调基站天线

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107302137A (zh) * 2016-04-15 2017-10-27 安弗施无线射频系统（上海）有限公司 多远程电调装置、多频天线装置和双极化电调智能天线装置

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