WO2012100468A1 - Système d'antenne intérieure omnidirectionnelle - Google Patents

Système d'antenne intérieure omnidirectionnelle Download PDF

Info

Publication number
WO2012100468A1
WO2012100468A1 PCT/CN2011/073340 CN2011073340W WO2012100468A1 WO 2012100468 A1 WO2012100468 A1 WO 2012100468A1 CN 2011073340 W CN2011073340 W CN 2011073340W WO 2012100468 A1 WO2012100468 A1 WO 2012100468A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
vertical
antenna system
dipoles
metal reflector
Prior art date
Application number
PCT/CN2011/073340
Other languages
English (en)
Inventor
Yong Ding
Rongguang WU
Jin Pan
Bing Wu
Wen Lu
Shaocong LIU
Qiaoxin LIN
Lihua Zhang
Xiaochun Gao
Yuanbo CHENG
Original Assignee
Tongyu Communication Inc.
China Mobile Group Guangdong 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
Application filed by Tongyu Communication Inc., China Mobile Group Guangdong Co., Ltd. filed Critical Tongyu Communication Inc.
Publication of WO2012100468A1 publication Critical patent/WO2012100468A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/40—Element having extended radiating surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/007—Details of, or arrangements associated with, antennas specially adapted for indoor communication
    • 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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction

Definitions

  • the present invention relates to a broadband indoor antenna, and especially to a dual polarized omni- directional indoor antenna.
  • indoor antennas and devices are used for transmitting or receiving wireless signals.
  • a monopole antenna is usually used as a typical indoor antenna for the second generation (2G) wireless communication system.
  • Frequencies of 2G system are generally around 800MHz, 900MHz or lGHz which have relatively longer wavelengths. Wave propagation of these frequencies is less affected in an indoor environment due to the larger wavelength.
  • 3G systems which has higher frequency are widely used.
  • the conventional narrow band indoor antennas don't satisfy these wideband systems.
  • the operation frequency of 3G system are relative higher than 2G system, for instance, frequency of the TD-SCDMA system starts from 1880MHz to 2025MHz, and most advanced 3G networks such as TD-LTE is at a higher frequency range from 2570MHz to 2620MHz.
  • the carrier frequencies of these systems are higher, the propagation characteristics are even worse because of the shorter wavelength, and it is more difficult to improve signal coverage for blind zone in the indoor environment.
  • various wireless communication standards including 2G, 3G and 3G+ systems will exist simultaneously. It is desirable to develop a wideband indoor antenna system to cover all the frequency bands above. The proposed antenna should be able to provide these systems with multi services at multi bands.
  • a main object of the present invention is to provide an omni- directional indoor antenna which provides better signal coverage, dual-polarized operation and higher antenna gain.
  • the proposed antenna improves transmission and coverage of indoor signals in a wideband frequency for 2G, 3G, and even 3G+ wireless systems.
  • an omni-directional indoor antenna in the present invention comprises a metal reflector, a first antenna and a second antenna.
  • the first antenna is vertically mounted on the metal reflector and used to radiate or receive RF signals in a vertical polarization.
  • the second antenna is horizontally located above the metal reflector and used to radiate or receive RF signals in a horizontal polarization.
  • Such a dual-polarized wideband indoor antenna system is proposed for 2G, 3G and 3G+ wireless communication system.
  • the first antenna is a monopole which is configured as a vertical hollow column and an inverted pyramidal part.
  • the hollow vertical column is substantially enclosed by four side metal walls which define the hollow interior thereof.
  • the pyramidal part comprises four side metal walls extending therefrom and tapering off.
  • the side wall of the vertical column has a rectangular shape. Each of two adjacent rectangular side walls is conjoined by an arc face.
  • the side wall of the pyramidal part has a triangular shape, which abuts against each other to form a tip on the reflector.
  • the first antenna is fixed to the reflector by a first isolating bracket, and is conductively connected to the metal reflector by a metal plate whereby providing earth ground for lightning protection.
  • the second antenna comprises a plurality of coplanar dipoles.
  • the dipoles are arranged as a rotational- symmetry array. Each of two adjacent dipoles is spaced with the same angle.
  • the dipoles are perpendicularly placed on top of the first antenna and supported by a second isolating bracket on the side wall of the first antenna.
  • the second antenna provides horizontal polarization of the dual-polarized indoor antenna.
  • the first feeding network comprises a first RF connector positioned on back of the metal reflector and a RF cable connecting to the horizontal polarized antenna.
  • the second feeding network comprises a second RF connector positioned on back of the metal reflector connecting to the vertical polarized antenna.
  • the second antenna and its feeding network (namely, the first feeding network described above) are fabricated by a same PCB.
  • a power dividing network of the first feeding network are etched on the PCB board for electrically feeding the dipoles.
  • a main port is used to transfer RF signal from the feeding network to the dipoles by the power dividing network.
  • isolation resistors are inserted between branches of the power dividing network.
  • FIG. 1 is a perspective view of an omni- directional indoor antenna system in accordance with an embodiment of the present invention
  • FIG. 2 is another perspective view of the antenna system in FIG.l ;
  • FIG. 3 is a top view of the indoor antenna system in FIG.l ;
  • FIG. 4 (a) is a perspective view of the indoor antenna system in another embodiment, herein FIG. 4(b) is an enlarged view of part of FIG. 4(a) with dashed line;
  • FIGS 5 shows measured VSWR as a function of frequency for the vertical polarized antenna shown in FIG. 1 ;
  • FIG. 6 shows measured VSWR as a function of frequency for the horizontal polarized antenna shown in FIG. 1 ;
  • FIG. 7 shows measured isolation between vertical and horizontal polarized antennas
  • FIGS 8(a)-(d) are graphs showing measured radiation pattern in the E-plane for the vertical antenna
  • FIGS 9(a)-(b) are graphs showing measured radiation pattern in the E-plane for the horizontal antenna
  • FIGS 10(a)-(b) are graphs showing measured radiation pattern in the H-plane for the horizontal antenna.
  • FIG. l l(a)-(d) are graphs showing measured radiation pattern in the H-plane for the vertical antenna.
  • an omni- directional indoor antenna system 100 includes a metal reflector 1, a first antenna 2, and a second antenna 3.
  • the first antenna 2 is vertically mounted on the reflector 1.
  • the second antenna 3 is horizontally located above the reflector 1 and placed orthogonally to the first antenna 2.
  • the indoor antenna system 100 is constructed in such way that the vertical and the horizontal antennas provide dual-polarized application.
  • the proposed dual-polarized antenna system satisfies the wireless signal coverage in the indoor environment which supports high gain as well as eliminate the blind zone in a very wideband frequency for the 2G, 3G and 3G+ systems. It comes true only one wideband dual-polarized indoor antenna is needed to replace various narrow band indoor antennas for different wireless communication systems.
  • the first antenna 2 is a kind of monopole antenna made of metal and in a shape of hollow case vertically extends upward.
  • the vertical antenna 2 comprises a rectangular column 4 and an inverted pyramid bottom 7.
  • the rectangular column 4 is open at the upper end, and the other end thereof extends downward to form the inverted pyramidal configuration 7.
  • the rectangular column 4 is substantially enclosed by four rectangular side walls 5 and thus defines a hollow space therein.
  • Each of two adjacent side walls 5 are conjoined by an arc face 6.
  • the pyramid configuration 7 correspondingly comprises four side walls 70 which abut against each other and are converged to a tip 71.
  • the tip 71 is near from the reflector 1.
  • Each side wall 70 has an exemplary shape of triangle, but it is not limited to.
  • the antenna 2 may have a variety of shapes, such as circular, elliptical, rectangular, square, polygonal or some other configurations.
  • the monopole antenna 2 works in vertical polarization. It is used to transmit or receive wireless signals within all the frequency bands of 2G, 3G and 3G+ systems.
  • the working frequency of the antenna 2 starts from 880MHz to 2690MHz.
  • the horizontal antenna 3 comprises a plurality of dipoles 8.
  • the dipoles 8 are horizontally arranged in coplanar. More specifically, the dipoles 8 are configured as an integral and rotational- symmetry structure in which the angles between each of two adjacent dipoles are the same.
  • the dipoles 8 are etched on a PCB board 17.
  • the plurality of dipoles 8 and the PCB 17 are configured as an integral and coplanar structure, too.
  • the dipoles 8 are extended outward from the PCB 17 and kept symmetric around the center of the PCB 17.
  • one or two pair(s) of dipoles 8 in a shape of "T" are fabricated in a rotational- symmetry way, and the peripheral of dipoles are located in the same circumference. It should be understood that the dipoles 8 can be designed in various shapes and any number according to the antenna frequency and the specific indoor environment.
  • the horizontal antenna 3 is located above the first antenna 2 and provides the horizontal polarization. Its working frequency starts from 1880MHz to 2690MHz, thus covers the frequency band of TD-SCDMA and TD-LTE systems.
  • Each dipole 8 is supported on the vertical antenna 2 or on the reflector 1 using a dielectric bracket 9.
  • the dielectric brackets 9 orthogonally support dipoles 8 on top of the vertical antenna 2 by gripping the sidewall of the vertical column 4. Thereby, the horizontal antenna covers the upper open end of the vertical antenna.
  • the vertical antenna 2 is steadily mounted on the reflector 1 using a insulating bracket 10.
  • a metal plate 16 is used to connect the vertical antenna 2 with the reflector 1, thus the vertical antenna 2 is kept ground connection for lightning protection.
  • a power dividing network 11 is etched on the PCB board 17 to electrically feed the dipoles 8.
  • three two-way power dividers 19 are used to distribute RF signal from the main port 18 to each dipole 8 in same phase and equal amplitude.
  • An isolating resistor 12 is inserted in the branch circuitries in order to eliminate the coupling between each other.
  • the omni-directional indoor antenna system 100 further comprises a first feeding network 13 and a second feeding network 15.
  • the first feeding network 13 comprises an RF connector 130 mounted on the back of the reflector 1, and a RF cable 14 with one end connecting to the horizontal antenna 3 and the other end connecting to the first RF connector 130.
  • first end of the cable 14 is engaged with the horizontal antenna 3, extends from the main port 18 of the power dividing network 11 into the hollow interior of the vertical antenna 2, and passes through the sidewall of the vertical antenna 2, then passes through the reflector, and finally, the other end thereof connects with the RF connector 130 on the back of the reflector 1.
  • the second feeding network 15 comprises a second RF connector 150 mounted on the back of the reflector 1.
  • One end of the RF connector 150 passes through the reflector 1 to electrically connect with the vertical antenna 2.
  • the end of the RF connector 150 substantially connects to the tip 71 of the pyramidal part 7 of the vertical antenna 2.
  • the cable 14 is a kind of coaxial feed cable.
  • the cable 14 connects the horizontal antenna 3 with the first RF connector 130, while outer conductor 140 of the coaxial feed cable 14 is conductively connected to the metal reflector 1, which provides the horizontal antenna 3 grounding connection and thus lightning protection.
  • the indoor antenna system 100 of the present invention comprises the vertical polarized monopole antenna 2 and the horizontal polarized antenna 3 as mentioned above, thus providing the antenna dual polarization. It works for a very wide frequency band which covers wireless communication standards including 2G, 3G and 3G+ systems with good performance, such as high gain and dual-polarized signal propagation. Furthermore, the horizontal antenna 3 of the antenna system 100 has a plurality of dipoles 8 etched on the PCB board
  • Table 1 demonstrates measured antenna gain as a function of frequency for the vertical antenna 2 and horizontal antenna 3 of the antenna system 100 in
  • FIGS 1-3 As shown in Table 1, for the vertical antenna 2, the antenna gain is about 2.5dBi and 6.5dBi for frequency bands of 880-960MHz and 1750-2620MHz, respectively. For the horizontal antenna 3, the gain is about
  • the indoor antenna system 100 of the present invention has achieved good performance in the frequency bands of the 2G, 3G and 3G+ system. Both senses of polarization radiate efficiently over a broad band.
  • FIG. 5 shows measured VSWR (Voltage Standing Wave Ratio) as a function of frequency for the vertical polarized antenna 2. As shown in FIGS. 5(a) and 5(b), the values of VSWR are less than 1.46 within the operating frequencies from 880 to 960MHz, and less than 1.47 within the operating frequencies from 1710 to 2690MHz, respectively.
  • FIG. 6 shows measured VSWR as a function of frequency for the horizontal polarized antenna 3. As shown in FIG. 6, the value of VSWR is less than 1.33 within the operation frequencies from 1880 to 2400MHz.
  • the antenna system 100 of the present invention is adapted to broad frequency bands of the 2G, 3G and 3G+ system.
  • FIG. 7 shows the isolation between vertical polarized antenna 2 and horizontal polarized antenna 3.
  • the isolation between two polarizations is less than -25.8dB which indicates that the isolation is sufficiently high to make two polarizations decoupled and operated independently. It is recognized from measurement results above that configuration of antenna system 100 of the present embodiment is appropriate.
  • FIGS 8(a)-(d) show the measured radiation patterns in the E-plane at frequencies of 880MHz, 1800MHz, 1900MHz and 2620MHz for the vertical polarized antenna 2, respectively.
  • FIGS 9(a)-(b) show the measured radiation patterns in the E-plane at frequencies of 1900MHz and 2350MHz for the horizontal polarized antenna 3, respectively.
  • the measured symmetrical E-plane radiation patterns provide the antenna system 100 of the present invention good performance.
  • FIGS 10(a)-(b) show the measured radiation patterns in the H-plane at frequencies of 1900MHz and 2350MHz for the horizontal polarized antenna 3, respectively.
  • FIGS l l(a)-(d) show the measured radiation patterns in the H-plane at frequencies of 880MHz, 1800MHz, 1900MHz and 2620MHz for the vertical polarized antenna 2, respectively.
  • circularity is related to the degree in which the uniform distribution is approximated.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)
  • Aerials With Secondary Devices (AREA)
  • Support Of Aerials (AREA)

Abstract

L'invention concerne une antenne intérieure omnidirectionnelle (100) qui comprend un réflecteur métallique (1), une antenne à polarisation verticale (2) située sur le réflecteur métallique ; et une antenne à polarisation horizontale (3) liée orthogonalement à l'antenne à polarisation verticale située au-dessus du réflecteur métallique. L'antenne à polarisation verticale est une antenne monopole qui comprend une colonne creuse (5) avec une configuration en pyramide (7) à l'extrémité inférieure. L'antenne à polarisation horizontale comprend une pluralité de dipôles coplanaires (8). Le système d'antenne de la présente invention fonctionne dans une bande de fréquence large qui couvre toutes les normes de communication standard, y compris celles des systèmes 2G, 3G et 3G+ et qui donne de bonnes performances telles que des caractéristiques de gain élevé et de bonne propagation de signal.
PCT/CN2011/073340 2011-01-27 2011-04-26 Système d'antenne intérieure omnidirectionnelle WO2012100468A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110029731.5 2011-01-27
CN201110029731.5A CN102110910B (zh) 2011-01-27 2011-01-27 室内双极化全向天线

Publications (1)

Publication Number Publication Date
WO2012100468A1 true WO2012100468A1 (fr) 2012-08-02

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JP5872001B1 (ja) * 2014-08-21 2016-03-01 電気興業株式会社 偏波共用八木アンテナ
WO2016071902A1 (fr) * 2014-11-03 2016-05-12 Corning Optical Communications Wireless Ltd. Antennes planes monopôles multibandes configurées pour faciliter une isolation radiofréquence (rf) améliorée dans un système d'antennes entrée multiple sortie multiple (mimo)
US9813164B2 (en) 2011-02-21 2017-11-07 Corning Optical Communications LLC Providing digital data services as electrical signals and radio-frequency (RF) communications over optical fiber in distributed communications systems, and related components and methods
US9853732B2 (en) 2010-05-02 2017-12-26 Corning Optical Communications LLC Digital data services and/or power distribution in optical fiber-based distributed communications systems providing digital data and radio frequency (RF) communications services, and related components and methods
US10014944B2 (en) 2010-08-16 2018-07-03 Corning Optical Communications LLC Remote antenna clusters and related systems, components, and methods supporting digital data signal propagation between remote antenna units
US10110308B2 (en) 2014-12-18 2018-10-23 Corning Optical Communications Wireless Ltd Digital interface modules (DIMs) for flexibly distributing digital and/or analog communications signals in wide-area analog distributed antenna systems (DASs)
US10135533B2 (en) 2014-11-13 2018-11-20 Corning Optical Communications Wireless Ltd Analog distributed antenna systems (DASS) supporting distribution of digital communications signals interfaced from a digital signal source and analog radio frequency (RF) communications signals
US10187151B2 (en) 2014-12-18 2019-01-22 Corning Optical Communications Wireless Ltd Digital-analog interface modules (DAIMs) for flexibly distributing digital and/or analog communications signals in wide-area analog distributed antenna systems (DASs)
CN109818659A (zh) * 2017-11-16 2019-05-28 广达电脑股份有限公司 通讯装置
US10659163B2 (en) 2014-09-25 2020-05-19 Corning Optical Communications LLC Supporting analog remote antenna units (RAUs) in digital distributed antenna systems (DASs) using analog RAU digital adaptors
CN111326851A (zh) * 2020-02-26 2020-06-23 中国电信股份有限公司 天线装置
CN112103664A (zh) * 2020-10-15 2020-12-18 内江喜马雅拉网络技术有限公司 用于天花板的组合式天线阵
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WO2015123886A1 (fr) * 2014-02-24 2015-08-27 华为终端有限公司 Appareil d'antenne et dispositif de terminal
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CN112909582B (zh) * 2021-01-21 2023-06-20 杭州永谐科技有限公司上海分公司 一种用于终端通信测试的宽带正交双极化全向天线及方法

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US10014944B2 (en) 2010-08-16 2018-07-03 Corning Optical Communications LLC Remote antenna clusters and related systems, components, and methods supporting digital data signal propagation between remote antenna units
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US9813164B2 (en) 2011-02-21 2017-11-07 Corning Optical Communications LLC Providing digital data services as electrical signals and radio-frequency (RF) communications over optical fiber in distributed communications systems, and related components and methods
US10205538B2 (en) 2011-02-21 2019-02-12 Corning Optical Communications LLC Providing digital data services as electrical signals and radio-frequency (RF) communications over optical fiber in distributed communications systems, and related components and methods
JP5872001B1 (ja) * 2014-08-21 2016-03-01 電気興業株式会社 偏波共用八木アンテナ
US10659163B2 (en) 2014-09-25 2020-05-19 Corning Optical Communications LLC Supporting analog remote antenna units (RAUs) in digital distributed antenna systems (DASs) using analog RAU digital adaptors
WO2016071902A1 (fr) * 2014-11-03 2016-05-12 Corning Optical Communications Wireless Ltd. Antennes planes monopôles multibandes configurées pour faciliter une isolation radiofréquence (rf) améliorée dans un système d'antennes entrée multiple sortie multiple (mimo)
US10096909B2 (en) 2014-11-03 2018-10-09 Corning Optical Communications Wireless Ltd. Multi-band monopole planar antennas configured to facilitate improved radio frequency (RF) isolation in multiple-input multiple-output (MIMO) antenna arrangement
US10135533B2 (en) 2014-11-13 2018-11-20 Corning Optical Communications Wireless Ltd Analog distributed antenna systems (DASS) supporting distribution of digital communications signals interfaced from a digital signal source and analog radio frequency (RF) communications signals
US10523326B2 (en) 2014-11-13 2019-12-31 Corning Optical Communications LLC Analog distributed antenna systems (DASS) supporting distribution of digital communications signals interfaced from a digital signal source and analog radio frequency (RF) communications signals
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US10187151B2 (en) 2014-12-18 2019-01-22 Corning Optical Communications Wireless Ltd Digital-analog interface modules (DAIMs) for flexibly distributing digital and/or analog communications signals in wide-area analog distributed antenna systems (DASs)
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CN112103664A (zh) * 2020-10-15 2020-12-18 内江喜马雅拉网络技术有限公司 用于天花板的组合式天线阵
CN112821068A (zh) * 2020-12-31 2021-05-18 Oppo广东移动通信有限公司 天线模组和客户前置设备
CN112821068B (zh) * 2020-12-31 2023-08-15 Oppo广东移动通信有限公司 天线模组和客户前置设备

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