EP0569390B1 - Systeme d'antenne - Google Patents

Systeme d'antenne Download PDF

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Publication number
EP0569390B1
EP0569390B1 EP92902722A EP92902722A EP0569390B1 EP 0569390 B1 EP0569390 B1 EP 0569390B1 EP 92902722 A EP92902722 A EP 92902722A EP 92902722 A EP92902722 A EP 92902722A EP 0569390 B1 EP0569390 B1 EP 0569390B1
Authority
EP
European Patent Office
Prior art keywords
lens
antenna system
antenna
feeder lines
helical
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
EP92902722A
Other languages
German (de)
English (en)
Other versions
EP0569390A1 (fr
Inventor
David Harrison
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.)
Technicolor SA
Original Assignee
Thomson Multimedia SA
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 Thomson Multimedia SA filed Critical Thomson Multimedia SA
Priority to EP92902722A priority Critical patent/EP0569390B1/fr
Publication of EP0569390A1 publication Critical patent/EP0569390A1/fr
Application granted granted Critical
Publication of EP0569390B1 publication Critical patent/EP0569390B1/fr
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
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas
    • 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
    • H01Q19/06—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 refracting or diffracting devices, e.g. lens
    • 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
    • H01Q19/06—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 refracting or diffracting devices, e.g. lens
    • H01Q19/062—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 refracting or diffracting devices, e.g. lens for focusing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/007—Antennas or antenna systems providing at least two radiating patterns using two or more primary active elements in the focal region of a focusing device
    • H01Q25/008—Antennas or antenna systems providing at least two radiating patterns using two or more primary active elements in the focal region of a focusing device lens fed multibeam arrays

Definitions

  • the invention relates to an antenna system including a lens and means for feeding elctromagnetic waves, which can preferably be used for receiving microwave signals.
  • Antenna systems including a Luneburg lens and appropriate feeds are known, e.g. from US 4 531 129. Such systems can be used as part of a satellite broadcasting receiver system to receive microwave signals. But they can also be used as part of a transmitter system.
  • plane reflecting surfaces may be placed through its center and the ray paths may be traced by the use of images.
  • the addition of such reflectors produces virtual sources whose positions depend on the orientation of the real feed source and the reflector.
  • antenna systems which include a parabolic reflector and a feeder horn provided in the focal point of the parabolic reflector, for receiving microwave signals.
  • said feeder horn can be replaced by a helical antenna with two ends whereby the first end is linked to a feeder line.
  • a helical antenna may be built as a so-called endfire helical antenna, where under maximum received power conditions the direction of the signal power flow at the said first end is in the same direction as the received radiation.
  • a helical antenna can also be built as a so-called backfire helical antenna, where under maximum received power conditions the direction of the signal power flow at the said first end is in the opposite direction to the received radiation.
  • an antenna system which comprises a reflector, a primary helical antenna having a coil with a pair of ends, said coil located at the focal point of said reflector so that the axis of the helical antanna coincides essentially with the axis of said reflector.
  • a feeder line couples the antenna system with an external circuit, so that said primary helical antenna represents a backfire helical antenna coupled with said feeder line at the nearer end from said reflector and the other end of the helical antenna is free standing, and said feeder line is a coaxial cable.
  • the antenna system according to the invention includes a lens, preferably a Luneburg-type lens, with feed means shaped as a helical coil.
  • the production costs may be reduced and the antenna system is less bulky.
  • the inventive antenna system increases receiving efficiency by decreasing aperture blocking and the length of the required feeder cables can be reduced.
  • said feed means which are also named means for feeding, can be used for receiving and transmitting electromagnetic waves.
  • the inventive antenna system can also be used as transmitter antenna system.
  • Fig 1a shows a known antenna system in which a wave 10 is refracted by a spherical Luneburg lens 11 such that it is focussed in a focal point 12a. Near the focal point 12a a feeder horn 13a is provided, which receives the focussed wave and leads appropriate signals by a coaxial cable 14a to a receiver 15.
  • waves may be focussed in focal points 12b, 12c respectively, received by feeder horns 13b, 13c and appropriate signals may be led by coaxial cables 14b, 14c to the receiver 15.
  • the receiver 15 is preferably built as a low noise receiver, which might contain appropriate converting and receiving means.
  • Fig. 1b shows another known antenna system with a virtual-source Luneburg lens. Details with the same function as in fig. 1a have got the same reference numbers.
  • the wave 10 is focussed by a construction of a hemispherical Luneburg lens 21 and a plane reflector 16 at a focal point 22a.
  • the not shown waves may be focussed at focal points 22b, 22c respectively and the according signals are led to the receiver 15.
  • the antenna aperture is blocked by the feeder horns 13a, 13b, 13c and by the coaxial cables 14a, 14b, 14c.
  • fig. 2 shows the wave 10 only outside of the spherical Luneburg lens 11. But it is to be kept in mind that said wave 10 propagates also inside said lens 11. At the focal point 12a an endfire helical antenna 23a is provided, which is connected with the coaxial cable 14a.
  • the signals received by the endfire helical antennas 23a, 23b, 23c are led by the coaxial cables 14a, 14b, 14c to the receiver 15.
  • Fig. 3 shows another preferred embodiment of the invention, the wave 10 again for clearness being shown only outside of the hemispherical Luneburg lens 21.
  • the signals received by the backfire helical antennas 22a, 22b, 22c are led by the feeder lines 24a, 24b, 24c respectively to the receiver 15.
  • the helical antennas 23, 33 and the feeder lines 24 are integrated in the respective lenses 11, 21. This can be realized by an appropriate production process, where openings may be provided for cable paths and/or the helical antennas 23, 33.
  • the refraction index of said lenses may be corrected appropriately, which may be achieved by using a production process, where dielectric material, e.g. shaped as a thread, with a variable refraction index is wrapped. Appropriate corrections of the refraction index are also possible, if dielectric material is formed as a series of hemispherical shells or other suitable shapes.
  • the antenna system according to the invention includes a lens, which focusses incoming waves at respective focal points.
  • Helical feeders which are provided near said focal points and preferably integrated in said lens, receive the waves and appropriate signals are led by feeder lines to a suitable receiver or amplifier, or pre-amplifier, or the like.
  • the antenna system is less bulky and especially in this case the length of required feeder lines can be reduced and the receiving efficiency can be increased compared to known systems.
  • the system according to the invention is preferably used as part of a system for receiving Direct Broadcasting Satellite microwaves from different satellites.

Landscapes

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

Abstract

Le système d'antenne décrit comprend une lentille (11) qui focalise à des point focaux respectifs (12a-c) les ondes d'arrivée (10). Des cables d'alimentation hélicoïdaux (23a-c), lesquels sont situés à proximité desdits points focaux (12a-c) et de préférence intégrés dans ladite lentille (11), reçoivent les ondes (10), et les signaux appropriés sont acheminés par des lignes d'alimentation (14a-c) à un récepteur approprié (15). Le système d'antenne décrit permet d'obtenir un support mécanique pour les câbles d'alimentation et les lignes d'alimentation. Si une lentille hémisphérique est utilisée, le système d'antenne est moins encombrant et notamment dans ce cas, la longueur des lignes d'alimentation nécessaires peut être réduite et l'efficacité de réception peut être accrue. Le système décrit s'utilise de préférence dans le cadre d'un système permettant de recevoir des faisceaux hertziens de Satellite de Radiodiffusion Directe en provenance de différents satellites.

Claims (4)

  1. Réseau d'antennes comprenant une lentille (11, 21) et des dispositifs d'alimentation (33) sous forme d'antennes à rayonnement longitudinal et/ou rétrodirectives, destinées à recevoir et/ou à transmettre des ondes électromagnétiques, caractérisé en ce que les dispositifs d'alimentation (33) sont disposés au moins partiellement à l'intérieur de la surface de la lentille (21).
  2. Réseau d'antennes selon la revendication 1, caractérisé en ce que la lentille (11, 21) est du type Luneburg ou du type homogène.
  3. Réseau d'antennes selon la revendication 1 ou 2, caractérisé en ce que la lentille (11) est une lentille sphérique (11) ou conique.
  4. Réseau d'antennes selon la revendication 1 ou 2, caractérisé en ce que la lentille (21) est une lentille hémisphérique (21) et que lesdits dispositifs d'alimentation susmentionnés (33) fonctionnent en mode rétrodirectif.
EP92902722A 1991-01-28 1992-01-18 Systeme d'antenne Expired - Lifetime EP0569390B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92902722A EP0569390B1 (fr) 1991-01-28 1992-01-18 Systeme d'antenne

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP91400179 1991-01-28
EP91400179 1991-01-28
EP92902722A EP0569390B1 (fr) 1991-01-28 1992-01-18 Systeme d'antenne
PCT/EP1992/000090 WO1992013373A1 (fr) 1991-01-28 1992-01-18 Systeme d'antenne

Publications (2)

Publication Number Publication Date
EP0569390A1 EP0569390A1 (fr) 1993-11-18
EP0569390B1 true EP0569390B1 (fr) 1996-08-14

Family

ID=8208533

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92902722A Expired - Lifetime EP0569390B1 (fr) 1991-01-28 1992-01-18 Systeme d'antenne

Country Status (14)

Country Link
EP (1) EP0569390B1 (fr)
JP (1) JPH06504659A (fr)
KR (1) KR930703718A (fr)
CN (1) CN1027476C (fr)
AU (1) AU1162992A (fr)
DE (1) DE69212807T2 (fr)
ES (1) ES2090604T3 (fr)
MX (1) MX9200323A (fr)
MY (1) MY108658A (fr)
NZ (1) NZ241412A (fr)
RU (1) RU2067342C1 (fr)
TR (1) TR27907A (fr)
WO (1) WO1992013373A1 (fr)
ZA (1) ZA92539B (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000076027A1 (fr) * 1999-06-07 2000-12-14 Spike Broadband Systems, Inc. Lentilles a gradient symetrique sur le plan axial et systemes d'antennes correspondants
US7358913B2 (en) 1999-11-18 2008-04-15 Automotive Systems Laboratory, Inc. Multi-beam antenna
EP1764868A1 (fr) * 1999-11-18 2007-03-21 Automotive Systems Laboratory Inc. Antenne multi-faisceau
US7994996B2 (en) 1999-11-18 2011-08-09 TK Holding Inc., Electronics Multi-beam antenna
US7042420B2 (en) 1999-11-18 2006-05-09 Automotive Systems Laboratory, Inc. Multi-beam antenna
US6424319B2 (en) * 1999-11-18 2002-07-23 Automotive Systems Laboratory, Inc. Multi-beam antenna
EP1819014A1 (fr) * 2001-09-28 2007-08-15 Sumitomo Electric Industries, Ltd. Dispositif d'antenne à lentille à onde radio
US7348934B2 (en) 2003-01-30 2008-03-25 Sumitomo Electric Industries, Ltd. Lens antenna system
JP3867713B2 (ja) * 2003-06-05 2007-01-10 住友電気工業株式会社 電波レンズアンテナ装置
JP2004140860A (ja) * 2003-12-12 2004-05-13 Toshiba Corp レンズアンテナ装置とその放射器位置決め制御方法
JP2008530914A (ja) 2005-02-10 2008-08-07 オートモーティブ システムズ ラボラトリー インコーポレーテッド ガードビームを有する車輌レーダーシステム
US7898480B2 (en) 2005-05-05 2011-03-01 Automotive Systems Labortaory, Inc. Antenna
JP4679276B2 (ja) * 2005-07-11 2011-04-27 株式会社東芝 レンズアンテナ装置
US9780457B2 (en) 2013-09-09 2017-10-03 Commscope Technologies Llc Multi-beam antenna with modular luneburg lens and method of lens manufacture
RU2657926C1 (ru) * 2017-07-25 2018-06-18 Дмитрий Сергеевич Алиев Антенное устройство на основе линзы Люнеберга
RU174675U1 (ru) * 2017-07-25 2017-10-25 Дмитрий Сергеевич Алиев Антенное устройство на основе линзы Люнеберга
US10587034B2 (en) 2017-09-29 2020-03-10 Commscope Technologies Llc Base station antennas with lenses for reducing upwardly-directed radiation
WO2019156791A1 (fr) 2018-02-06 2019-08-15 Commscope Technologies Llc Antennes de station de base à lentilles qui génèrent des faisceaux d'antenne ayant des diagrammes d'azimut omnidirectionnels
AU2021227766A1 (en) 2020-02-25 2022-09-01 All.Space Networks Limited Prism for repointing reflector antenna main beam

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487413A (en) * 1966-12-30 1969-12-30 Gen Dynamics Corp Wide angle electronic scan luneberg antenna
US4014028A (en) * 1975-08-11 1977-03-22 Trw Inc. Backfire bifilar helical antenna
DE2738549A1 (de) * 1977-08-26 1979-03-01 Licentia Gmbh Mikrowellen-antenne
DE2849438A1 (de) * 1978-11-15 1980-05-29 Licentia Gmbh Antennensystem
DE3134122A1 (de) * 1981-08-28 1983-03-17 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Antennensystem mit dielektrikum
GB8804175D0 (en) * 1988-02-23 1988-03-23 Secr Defence Solid dielectric lens aerial

Also Published As

Publication number Publication date
CN1064177A (zh) 1992-09-02
MX9200323A (es) 1992-09-01
DE69212807T2 (de) 1997-01-30
CN1027476C (zh) 1995-01-18
MY108658A (en) 1996-10-31
TR27907A (tr) 1995-10-11
EP0569390A1 (fr) 1993-11-18
KR930703718A (ko) 1993-11-30
NZ241412A (en) 1994-07-26
AU1162992A (en) 1992-08-27
DE69212807D1 (de) 1996-09-19
JPH06504659A (ja) 1994-05-26
RU2067342C1 (ru) 1996-09-27
ES2090604T3 (es) 1996-10-16
WO1992013373A1 (fr) 1992-08-06
ZA92539B (en) 1993-09-23

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