EP0895303B1 - Richtantennensystem mit gekreuzter Polarisation - Google Patents

Richtantennensystem mit gekreuzter Polarisation Download PDF

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Publication number
EP0895303B1
EP0895303B1 EP98401746A EP98401746A EP0895303B1 EP 0895303 B1 EP0895303 B1 EP 0895303B1 EP 98401746 A EP98401746 A EP 98401746A EP 98401746 A EP98401746 A EP 98401746A EP 0895303 B1 EP0895303 B1 EP 0895303B1
Authority
EP
European Patent Office
Prior art keywords
reflector
conductor elements
elements
dipoles
dipole
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.)
Expired - Lifetime
Application number
EP98401746A
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English (en)
French (fr)
Other versions
EP0895303A1 (de
Inventor
Franck Colombel
Eric Deblonde
Patrick Le Cam
Fabien Peleau
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.)
Alcatel Lucent SAS
Original Assignee
Alcatel CIT SA
Alcatel SA
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Publication date
Application filed by Alcatel CIT SA, Alcatel SA filed Critical Alcatel CIT SA
Publication of EP0895303A1 publication Critical patent/EP0895303A1/de
Application granted granted Critical
Publication of EP0895303B1 publication Critical patent/EP0895303B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/108—Combination of a dipole with a plane reflecting surface
    • 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
    • H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
    • 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
    • H01Q9/44—Resonant antennas with a plurality of divergent straight elements, e.g. V-dipole, X-antenna; with a plurality of elements having mutually inclined substantially straight portions

Definitions

  • the present invention relates to an antenna system directional cross-polarization, intended in particular cell phone.
  • EP-A-0 730 319 discloses a system directional antennas, having a plane reflector and an antenna array carried by this reflector.
  • Each of the antennas is a dipole defined by two conductive elements rights, which are mounted on two supports for their fixation to the reflector and are connected to the + and - terminals of a source Power.
  • the antennas of the network are aligned according to one of the axes of the reflector. They are simple polarization in the network.
  • US-A-5,030,962 discloses a structure directional antennas with cross polarization, having a high electrical resistivity substrate, particular silicone, a network of antennas formed on the substrate and a dielectric lens associated with the assembly. Each antenna has two dipoles and four diodes interconnecting the dipoles in pairs. The diodes are looped thus connecting the four branches of the two dipoles, two opposite diodes on the loop being polarity opposite to that of the two others.
  • WO 97/22159 A1 discloses a system according to preamble of claim 1.
  • the passive elements defined by dipoles and active elements such as diodes and any other components associated with dipoles are made by photoengraving techniques multilayer on the substrate.
  • the branches of the dipoles each have the shape of a straight and narrow conductive strip, or variant of a triangular conductive plate and are two two opposites, the respective axes of the two dipoles being orthogonal.
  • the present invention aims to achieve compact way a directional antenna system to cross polarization, adapted to mobile telephony.
  • each cell having at least two first elements drivers mounted upside down and powered by a first external source of energy by forming a first dipole, characterized in that each radiating cell comprises two second conductive elements mounted identically to the first and powered by a second external source of energy by forming a second dipole, and that said conductive elements are elements folded into shape of Ve and mounted orthogonally the second by compared to the first.
  • the radiating cell according to the invention comprises two antennas directional 1 and 2, cross-polarized.
  • Each of these two antennas constitutes a formed dipole by a pair of V-shaped conductive elements 1A and 1B or 2A and 2B depending on the dipole.
  • the two conductive elements of the same dipole are mounted upside down.
  • the two conductive elements of one of the two dipoles are orthogonal to those of the other.
  • the conductive elements of the dipole 1 are connected to a cable coaxial 3, for their supply by a first source external energy.
  • the conductive elements of the dipole 2 are similarly connected to another coaxial cable 4, for their feeding by a second external source of energy, which is independent of the first.
  • the polarity of the dipoles are noted + and - respectively in look at the two conductive elements of each of them.
  • each conductive element of dipoles has the advantage of minimizing the far-off effect of these orthogonal components that tend to vanish two to two. Comparatively, with respect to dipoles with conductive elements formed by two plates or layers having the shape of a full V, that the distant effect orthogonal components remain important. Indeed in such a dipole, the current lines flare out at near the edges of each full V to come follow these edges and make the orthogonal components no longer in opposition of phase.
  • V-shaped conductive elements of both dipoles are preferably plates bent Vee. This realization using plates and not drivers wire type increases bandwidth dipoles.
  • the opening of the V of each of the conductive elements is preferably between 20 ° and 80 °. She is advantageously from 40 to 50.degree. impedance optimization of the antennas.
  • the orientation of the Vés by ratio to the horizontal or the vertical is chosen so neither of the polarizations 5 and 6 have this horizontal direction, in order to optimize the transmission characteristics of the two dipoles.
  • This orientation of the Ves is such that the polarization directions 4 and 5 are at + 45 ° and - 45 ° respectively relative to the vertical.
  • V-shaped conductors each comprise the two branches of each Vee but also a leg 9A or 9B transverse to Ve and leaving from the base of it.
  • the two branches of the Ve and the leg form a single piece, the leg itself being folded together with the branches.
  • each dipole is substantially equal to half the wavelength of the radiated energy.
  • the paws such as 9A, or 9B are in turn substantially equal to one quarter of the wavelength and play the role of current baluns giving polarities + and - to the two elements of the same powered dipole. So, the electric power supplied by the connected power source at one of the dipoles is transformed into radio waves radiated by the dipole according to a broadband diagram desired.
  • the system of antennas shown includes a network of dual antennas polarization, which are identical to each other and to the cell of Figure 1 and are all designated under the same overall reference 10, this global reference being reported in correspondence in Figures 1 and 2.
  • This array of antennas or radiating cells 10 is carried by a rectangular plane reflector 11. It is arranged according to the longitudinal axis of the reflector. It has four cells in the example shown. Each cell is fed by its two cables 3 and 4 connected to the two dipoles of the cell.
  • the reflector has a width close to one wavelength of the energy radiated by the antennas.
  • the cables 3 of these different cells are connected to a cable main 13 through an energy divider 15 and similarly the cables 4 are connected to another cable main 14 through a second energy divider 16.
  • These two main cables 13 and 14 are also connected two coaxial connectors 17 and 18, carried by one of the reflector ends and provided for both sources of energy allocated to the dipoles of the different cells 10.
  • each of the cells 10 is fixed on the reflector using a conductive part 19, provided in end of the legs such as 9A and 9B of the two dipoles and she even attached to the reflector.
  • This piece 19 is circular in shape and relatively flat. It has four bores in one of its faces, in which are embedded and welded the ends of the four legs such as 9A and 9B and is secured by screws to the reflector.
  • Conductive elements in Vé with their paw individual and the fastener 19 are brass.
  • another piece of high electrical resistivity 20 by example plastic is advantageously mounted between four conductive elements of the same dipole, to reinforce their solidarity together.
  • This piece 20 is also used to the fixing of the two coaxial cables 3 and 4, the central conductor of each is soldered to one of the elements conductors.
  • This piece of solidarity is openwork for minimize its influence in the cell concerned 10.
  • the cross-polarized antenna system is also provided with at least one metal partition wall such as 21, between the cells or groups of cells of the network.
  • the single wall 21 used in the antenna system according to the FIGS. 3 and 4 are provided along the transverse axis of the reflector 11. It is fixed on the reflector, being protruding on this one. It avoids a direct coupling between the radiating elements located on both sides of it.
  • this antenna system is also equipped with an air coupling compensator between the dipoles, this indirect coupling resulting for a large part of the coupling between the fields from reflective reflections on the reflector and more particularly on its longitudinal edges provided generally folded and marked 11A and 11B.
  • the coupling compensator comprises two sections or brackets 23A, 23B. These angles are mounted on the rectangular plane reflector parallel to the edges longitudinal, and arranged symmetrically on the else of the longitudinal axis along which the four cells are aligned.
  • Both angles offer surfaces additional reflective material with respect to the edges, so that the recombination of reflective electric fields by the edges and by the brackets leads to a reduction sensitive coupling between the two polarizations orthogonal antenna system.
  • the system of antennas with a bandwidth of 872 MHz to 960 MHz centered around 915 MHz.
  • electromagnetic power is sent by a power source on the dipoles 1A - 1B of the four identical cells 10 whose polarization forms a + 45 degree angle with the longitudinal edge 11A.
  • the dipoles 2A - 2B cells 10 whose polarization form an angle of -45 degrees with the longitudinal edge 11B detect a power due to coupling, which in the presence of two angles described in the two previous examples, is in the order of a thousandth of the power sent by the source, whereas in the absence of angles, it is the order of one hundredth.
  • the two angles thus make it possible to divide by ten the coupling between the two polarizations crossover of the antenna system which goes from 20 decibel (dB) at 30 dB.
  • the compensator can understand on each side of the four cells several angles such as those mentioned above or a profile to several edges such as those angles aforementioned.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)
  • Waveguide Aerials (AREA)

Claims (14)

  1. Richtantennensystem mit gekreuzter Polarisation, bestehend aus einem Reflektor (11), der praktisch eben und rechteckig ist, und mindestens einer Strahlungszelle (10), die auf dem genannten Reflektor befestigt ist, wobei jede Zelle mindestens zwei erste leitfähige Elemente (1A, 1B) enthält, die einander entgegengesetzt montiert sind und von einer ersten externen Energiequelle versorgt werden und dadurch ein erstes Dipolsystem (1) bilden, in dem jede Strahlungszelle zwei zweite leitfähige Elemente (2A, 2B) beinhaltet, die in gleicher Weise wie die ersten montiert sind und die von einer zweiten externen Energiequelle versorgt werden und dadurch einen zweiten Dipol bilden, wobei die genannten zweiten leitfähigen Elemente (1A - 1B, 2A - 2B) senkrecht zu den ersten angeordnet sind, dadurch gekennzeichnet, dass es sich bei den genannten leitfähigen Elementen (1A - 1B, 2A - 2B) um V-förmig gefaltete Elemente handelt.
  2. System gemäß Anspruch 1, dadurch gekennzeichnet, dass jedes leitfähige Element aus einer V-förmig gefalteten Platte besteht.
  3. System gemäß einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass die genannten V-förmigen leitfähigen Elemente (1A - 1B, 2A - 2B) jeweils eine Öffnung zwischen 20 und 80° aufweisen.
  4. System gemäß Anspruch 3, dadurch gekennzeichnet, dass die genannte Öffnung zwischen ca. 40 und 50° gewählt wird.
  5. System gemäß einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die genannten V-förmigen leitfähigen Elemente eine Ausrichtung in einem Winkel ungleich Null in Bezug auf die Horizontale aufweisen, um eine Polarisationsrichtung (5, 6) aufzuweisen, deren Winkel in Bezug auf die Horizontale verschoben ist.
  6. System gemäß Anspruch 5, dadurch gekennzeichnet, dass die Polarisationsrichtung für die leitfähigen Elemente der beiden Dipole (1, 2) jeweils etwa + 45° und - 45° beträgt.
  7. System gemäß einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass jedes leitfähige Element eine leitfähige Lasche (9A, 9B) aufweist, die einerseits fest mit der Basis des V verbunden ist und über eine Seite des V mit einer Länge hinausragt, die in etwa einem Viertel der von dem entsprechenden Dipol abgestrahlten Wellenlänge entspricht, und andererseits an dem genannten Reflektor befestigt ist.
  8. System gemäß Anspruch 7, dadurch gekennzeichnet, dass es ein leitfähiges Teil (19) zur Befestigung der Laschen der leitfähigen Elemente einer Zelle (10) am Reflektor (11) enthält, wobei die Enden der genannten Laschen in das genannte Befestigungsteil eingelegt und darin verschweißt sind.
  9. System gemäß einem der Ansprüche 7 und 8, dadurch gekennzeichnet, dass es ein Verbindungsstück (20) aus einem Material mit erhöhtem elektrischen Widerstand enthält, das die genannten leitfähigen Elemente (1A - 1B, 2A - 2B) einer Zelle miteinander verbindet.
  10. System gemäß einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass es ein Netzwerk aus Zellen (10) beinhaltet, die entlang der Längsachse des Reflektors installiert sind.
  11. System gemäß Anspruch 11, dadurch gekennzeichnet, dass es zwei Hauptkabel (13, 14) enthält, die einerseits jeweils mit zwei Koaxverbindern (17, 18) verbunden sind, die an einem Ende des Reflektors vorgesehen sind und die der genannten ersten und zweiten Energiequelle zugeordnet sind, und die andererseits jeweils mit zwei Stromteilern (15, 16) verbunden sind, die wiederum jeweils mit den ersten und zweiten Kabeln (3, 4) verbunden sind, die der Stromversorgung der beiden Dipole der verschiedenen Zellen (10) zugeordnet sind.
  12. System gemäß Anspruch 10 oder 11, dadurch gekennzeichnet, dass der Reflektor (11) zwei Längskanten (11A, 11B) und Profile (23A, 23B) enthält, die parallel zur Längsachse und symmetrisch zu beiden Seiten des Netzwerks aus Zellen (10) installiert sind.
  13. System gemäß Anspruch 12, dadurch gekennzeichnet, dass jedes Profil (23A, 23B) eine Basis (24A, 24B) beinhaltet, die am Reflektor (11) befestigt ist, sowie mindestens einen Grat (26A, 26B), der um einen Winkel (α) unter 180° in Bezug auf die Basis gefaltet ist.
  14. System gemäß Anspruch 13, dadurch gekennzeichnet, dass jedes Profil ein Flachstück (28A, 28B) beinhaltet, das in Bezug auf den Grat gefaltet und an einer Längskante (11A, 11B) ausgerichtet ist.
EP98401746A 1997-07-28 1998-07-09 Richtantennensystem mit gekreuzter Polarisation Expired - Lifetime EP0895303B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9709566A FR2766626B1 (fr) 1997-07-28 1997-07-28 Systeme d'antennes directionnelles a polarisation croisee
FR9709566 1997-07-28

Publications (2)

Publication Number Publication Date
EP0895303A1 EP0895303A1 (de) 1999-02-03
EP0895303B1 true EP0895303B1 (de) 2005-02-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98401746A Expired - Lifetime EP0895303B1 (de) 1997-07-28 1998-07-09 Richtantennensystem mit gekreuzter Polarisation

Country Status (6)

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US (1) US6025798A (de)
EP (1) EP0895303B1 (de)
AT (1) ATE288624T1 (de)
CA (1) CA2242705C (de)
DE (1) DE69828848T2 (de)
FR (1) FR2766626B1 (de)

Cited By (1)

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US7075498B2 (en) 2004-05-27 2006-07-11 Kathrein-Werke Kg Stationary mobile radio antenna

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FR2808128B1 (fr) * 2000-04-20 2002-07-19 Cit Alcatel Antenne monolithique a polarisation croisee
US6747606B2 (en) * 2002-05-31 2004-06-08 Radio Frequency Systems Inc. Single or dual polarized molded dipole antenna having integrated feed structure
EP1667278A1 (de) * 2004-11-23 2006-06-07 Alcatel Antenne einer Basisstation mit dualpolarisierten Strahlerelementen und geformtem Reflektor
WO2006114455A1 (es) * 2005-04-25 2006-11-02 Radiacion Y Microondas, S.A. Antena de cavidad excitada con uno o varios dipolos
US20080231528A1 (en) * 2005-04-25 2008-09-25 Ramon Guixa Arderiu Cavity Antenna Excited with One or Several Dipoles
JP5175334B2 (ja) 2007-04-05 2013-04-03 テレフオンアクチーボラゲット エル エム エリクソン（パブル） 偏波依存ビーム幅調整器
WO2008146202A1 (en) * 2007-06-01 2008-12-04 Koninklijke Philips Electronics, N.V. Wireless ultrasound probe antennas
WO2009052153A1 (en) * 2007-10-15 2009-04-23 Jaybeam Wireless Base station antenna with beam shaping structures
FR2923323B1 (fr) * 2007-11-07 2011-04-08 Alcatel Lucent Antenne a piege reflechissant
US8593369B2 (en) * 2008-11-12 2013-11-26 Navico Holding As Antenna assembly
FR2950745B1 (fr) * 2009-09-30 2012-10-19 Alcatel Lucent Element rayonnant d'antenne a double polarisation
US8570233B2 (en) 2010-09-29 2013-10-29 Laird Technologies, Inc. Antenna assemblies
KR101711150B1 (ko) * 2011-01-31 2017-03-03 주식회사 케이엠더블유 이동통신 기지국용 이중편파 안테나 및 이를 이용한 다중대역 안테나 시스템
US9966664B2 (en) * 2012-11-05 2018-05-08 Alcatel-Lucent Shanghai Bell Co., Ltd. Low band and high band dipole designs for triple band antenna systems and related methods
TWM485521U (zh) * 2014-05-09 2014-09-01 Gemtek Technology Co Ltd 多頻段天線
SG10201505215SA (en) * 2015-06-30 2017-01-27 Matsing Pte Ltd Dual Polarized Radiator For Lens Antennas
US11128055B2 (en) * 2016-06-14 2021-09-21 Communication Components Antenna Inc. Dual dipole omnidirectional antenna
WO2020190863A1 (en) 2019-03-21 2020-09-24 Commscope Technologies Llc Base station antennas having parasitic assemblies for improving cross-polarization discrimination performance

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Also Published As

Publication number Publication date
CA2242705A1 (fr) 1999-01-28
ATE288624T1 (de) 2005-02-15
US6025798A (en) 2000-02-15
FR2766626A1 (fr) 1999-01-29
DE69828848T2 (de) 2006-04-06
CA2242705C (fr) 2006-05-30
DE69828848D1 (de) 2005-03-10
EP0895303A1 (de) 1999-02-03
FR2766626B1 (fr) 1999-10-01

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