EP0006391B1 - Système d'alimentation périscopique pour antenne bi-gamme - Google Patents

Système d'alimentation périscopique pour antenne bi-gamme Download PDF

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Publication number
EP0006391B1
EP0006391B1 EP79400411A EP79400411A EP0006391B1 EP 0006391 B1 EP0006391 B1 EP 0006391B1 EP 79400411 A EP79400411 A EP 79400411A EP 79400411 A EP79400411 A EP 79400411A EP 0006391 B1 EP0006391 B1 EP 0006391B1
Authority
EP
European Patent Office
Prior art keywords
axis
mirror
range
feed system
periscopic
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
Application number
EP79400411A
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German (de)
English (en)
French (fr)
Other versions
EP0006391A1 (fr
Inventor
Claude Aubry
Daniel Renaud
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.)
Thales SA
Original Assignee
Thomson CSF SA
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Filing date
Publication date
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0006391A1 publication Critical patent/EP0006391A1/fr
Application granted granted Critical
Publication of EP0006391B1 publication Critical patent/EP0006391B1/fr
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
    • H01Q15/0033—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective used for beam splitting or combining, e.g. acting as a quasi-optical multiplexer
    • 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
    • H01Q19/18—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 having two or more spaced reflecting surfaces
    • H01Q19/19—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 having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
    • H01Q19/191—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 having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface wherein the primary active element uses one or more deflecting surfaces, e.g. beam waveguide feeds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H01Q5/45—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more feeds in association with a common reflecting, diffracting or refracting device

Definitions

  • the present invention relates to a periscope feed system for a bi-range antenna.
  • a preferred application is found in the use of two frequency ranges on an antenna with frequency reuse by orthogonal polarizations.
  • the antennas with frequency reuse by orthogonal polarizations are antennas operating simultaneously and independently with two orthogonal polarizations. They include a reflector system, of the Cassegrain type for example, a power supply device comprising a primary source and a periscope ensuring the transmission of the wave beam from the source to the reflectors and comprising four mirrors whose curvatures determine the frequency reuse .
  • the entire feeding device and periscope are called the periscopic feeding system.
  • the reflector system is movable along two perpendicular axes.
  • the site and azimuth axes are used, identified in FIG. 1, which represents the classic case of a single-range antenna, respectively by the letters EL and AZ.
  • the supply device comprises a primary source 1 fixed of the corrugated horn type, placed on the axis AZ.
  • the periscope comprises a frame 2, movable around this axis AZ, and four mirrors 3, 4, 5, 6, the mirrors 3 and 6 or 4 and 6 being planar and the mirrors 4 and 5 or 3 and 5 respectively being focusing ( paraboloid or ellipsoid).
  • the microwave wave beam is reflected successively on the mirrors 3, 4, 5 and 6 which are respectively called first, second, third and fourth mirror of the periscope.
  • the arrangement of these mirrors in the periscope is well known for antennas with frequency reuse. It is nevertheless recalled that the first mirror 3 is centered on the azimuth axis, that the mirrors 3, 4, 5 are integral with the frame 2 and therefore movable around the azimuth axis, while the fourth mirror 6 is integral with the system of reflectors, comprising a main reflector 7 and a secondary reflector 8, and therefore mobile around the azimuth axis but also autbur of the site axis. This fourth mirror 6 is centered on the intersection of the azimuth and site axes.
  • the low range is from 4 to 6 GHz and the high range from 11 to 14 GHz.
  • a dielectric mirror is described in a Japanese document by Koyama "A wide band dielectrical filter for the antenna and feed system for the 4-6 GHz, 17-30 GHz domestic satellite communication system published in” The Summaries of papers of International Symposium on Antennas and Propagation, September 1-3, 1971, SENDAI, Japan.
  • the reflector system 7 and 8 in FIG. 2 remains unchanged because the example of the Cassegrain antenna considered above is kept.
  • the dichroic mirror 30 playing for him the same role as the plane mirror 3 of the figure 1 ; it is a primary source, for example a corrugated horn 1, located on the azimuth axis.
  • the dichroic mirror 30 is a high pass mirror whose cut-off frequency is as it reflects the waves emitted by the horn 7. These waves therefore follow a path identical to that followed by the waves in the single-range antenna.
  • the supply device 50 of the high range comprises a primary source 10 and a focusing mirror 9.
  • the primary source 10 for example a corrugated horn is parallel to the azimuth axis, directed upwards.
  • the mirror 9 is located so that the beam of waves of the high range which it reflects is directed towards the dichroic mirror 30 and is superimposed on the beam reflected of the low range beyond this mirror.
  • the purity of the polarization is obtained, as in the mono-range antenna, by compensation between the crossed polarizations created by each of the two focusing mirrors 4 and 5. It suffices that the central regions of these mirrors are produced with increased precision to obtain the same effect for the high range as for the low range.
  • An object of the invention is a rearrangement of the primary sources and the mirrors, executed in such a way that the sources are fixed as well as the mirror making it possible to superimpose or separate waves from the two sources, with preservation of the purity of the polarization .
  • the power supply system for bi-range antenna with frequency reuse and conservation of polarization purity comprising a reflector of the Cassegrain type mobile around an azimuth axis and a site axis, a periscope comprising at least four mirrors, a dichroic mirror centered on the azimuth axis and two excitation sources in frequency ranges, respectively high and low, supplying the antenna with its periscope via the dichroic mirror, is characterized in that the excitation sources are fixed and that the dichroic mirror is fixed and placed under the periscope.
  • periscope 60 with four mirrors 3, 4, 5 and 6, similar to that of the single-range antenna of Figure 1. This periscope feeds a reflector system of the Cassegrain type not shown in the figure .
  • a separating device fixed, in the form of a dichroic mirror 30.
  • This mirror is centered on the azimuth axis AZ and parallel to the first mirror 3 of the periscope; on transmission, it ensures the recombination of the two beams of waves emitted by two supply devices respectively low range 40 and high range 50 and their separation on reception.
  • the dichroic mirror 30 is therefore of the “high-pass” type, that is to say it is transparent for the high range and reflective for the low range.
  • the device 50 for excitation of the high range sends a wave train along the fixed axis AZ; this wave train crosses the mirror 30 and continues its path along the axis AZ towards the mirror 3.
  • This excitation device 50 comprises a primary source, for example a corrugated horn 10, supplied by a waveguide not shown in the figure, and a number of mirrors.
  • a primary source for example a corrugated horn 10, supplied by a waveguide not shown in the figure, and a number of mirrors.
  • it comprises a corrugated horn 10 and a focusing mirror 11.
  • the horn 10 is located parallel to the axis EL; the mirror 11 has its center on the axis AZ and has as normal at this point a parallel to the first bisector of the reference frame (EL-AZ), so that the wave beam reflected by this mirror has as propagation direction l 'axis AZ.
  • the curvature of the mirror 11 and the respective distances of this mirror, the horn 10 and the dichroic mirror 30 are such that there is a field concentration at the same time as a plane wave surface at the level of this dichroic mirror. .
  • the low range excitation device 40 sends a wave train in a direction such that after reflection on the mirror 30, the reflected beam propagates along the axis AZ, then superimposing itself on the beam of the high range.
  • the wave train emitted by the device 40 is therefore distributed around an axis AA 'parallel to the axis EL and passing through the center of the dichroic mirror 30.
  • This excitation device 40 comprises in the particular case of FIG. 3, a primary source, in this case, a corrugated horn 1 supplied by a waveguide not shown in the figure, and two focusing mirrors 12 and 13.
  • the mirror 13 is centered on the axis AA '.
  • the mirror 12 is centered on a parallel to the azimuth axis passing through the center of the mirror 13.
  • These mirrors 12 and 13 are further such that they compensate for the cross polarization which is likely to occur during the transmission of the signals and which then generates a harmful intermodulation.
  • the corrugated horn has for axis of symmetry and therefore for mean direction of radiation an axis parallel to the elevation axis and passing through the center of the mirror 12.
  • this low range excitation device is described in the case where its plane of symmetry is vertical. By subjecting this device to a rotation about the axis AA ′, it is possible, without drawback, to make this plane horizontal.
  • the geometric parameters (distance, curvature of the focusing mirrors) of the two excitation devices as well as the distances from the dichroic mirror 30 to each of these two excitation devices and to the first mirror of the periscope are determined according to the principles, well known in the art. prior art, periscopic antenna feed systems with frequency reuse. Remember that these parameters are.
  • a periscopic feeding system as described above therefore allows the transformation of an antenna with mono-range operation into an antenna with bi-range operation and this without modifying the basic structure of the periscope proper with the innovation, however, of having the dichroic mirror on the outside of the periscope and make it fixed and also make each of the excitation devices fixed.
  • the low range covers for example frequencies going from 3.7 to 6.4 GHz and the high range from 11 to 14.5 GHz.
  • the range used by conventional mono-range antennas corresponds to what has been called low range; it is therefore on it that the most severe standards weigh in a bi-range antenna;
  • the excitation device 40 adopted in the above description makes it possible, as has been said, thanks to the polarization compensation which it provides by the use of the two focusing mirrors 12 and 13 to maintain the polarization purity of the common periscope for this frequency range.
  • the same excitation device with two focusing mirrors could also be used for the high range in case the standards required are as strict as for the low range.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)
  • Surgical Instruments (AREA)
EP79400411A 1978-06-20 1979-06-20 Système d'alimentation périscopique pour antenne bi-gamme Expired EP0006391B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7818408 1978-06-20
FR7818408A FR2429505A1 (fr) 1978-06-20 1978-06-20 Systeme d'alimentation periscopique pour antenne bi-gamme

Publications (2)

Publication Number Publication Date
EP0006391A1 EP0006391A1 (fr) 1980-01-09
EP0006391B1 true EP0006391B1 (fr) 1983-11-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400411A Expired EP0006391B1 (fr) 1978-06-20 1979-06-20 Système d'alimentation périscopique pour antenne bi-gamme

Country Status (4)

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US (1) US4260993A (pt)
EP (1) EP0006391B1 (pt)
DE (1) DE2966404D1 (pt)
FR (1) FR2429505A1 (pt)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5744302A (en) * 1980-08-28 1982-03-12 Mitsubishi Electric Corp Antenna device
DE3144466A1 (de) * 1981-11-09 1983-07-07 AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang Steuerbare antennenanordnung
JPS58139503A (ja) * 1982-02-15 1983-08-18 Kokusai Denshin Denwa Co Ltd <Kdd> ビ−ム給電装置
JPS5911007A (ja) * 1982-07-12 1984-01-20 Nec Corp ２周波数帯共用のアンテナ装置
FR2535904B1 (fr) * 1982-11-09 1985-08-02 Thomson Csf Joint tournant de puissance pour antenne double bande
US5003321A (en) * 1985-09-09 1991-03-26 Sts Enterprises, Inc. Dual frequency feed
FR2713404B1 (fr) * 1993-12-02 1996-01-05 Alcatel Espace Antenne orientale avec conservation des axes de polarisation.
FR2715511B1 (fr) * 1994-01-21 1996-02-23 Thomson Csf Dispositif de compensation des erreurs de pointage causées par des pannes de déphaseurs d'antennes à balayage électronique ou de coefficients d'antennes à formation de faisceaux par le calcul.
US5929720A (en) * 1995-09-13 1999-07-27 Kabushiki Kaisha Toshiba Electromagnetic wave matching matrix using a plurality of mirrors
FR2739965B1 (fr) * 1995-10-17 1997-11-07 Thomson Csf Dispositif emetteur-recepteur de lumiere et systeme de lecture optique
FR2775347B1 (fr) * 1998-02-24 2000-05-12 Thomson Csf Procede de determination de l'erreur de calage de la face rayonnante d'une antenne reseau a balayage electronique
GB9810341D0 (en) * 1998-05-15 1998-07-15 Pilkington Perkin Elmer Ltd Optical imaging system
US6239763B1 (en) * 1999-06-29 2001-05-29 Lockheed Martin Corporation Apparatus and method for reconfiguring antenna contoured beams by switching between shaped-surface subreflectors
JP2001177433A (ja) * 1999-12-21 2001-06-29 Murata Mfg Co Ltd 高周波複合部品及び移動体通信装置
US6252558B1 (en) * 2000-02-18 2001-06-26 Raytheon Company Microwave transmit/receive device with light pointing and tracking system
CN103746187B (zh) * 2013-12-23 2015-09-23 北京邮电大学 一种卡塞格伦天线探测系统及其设计方法
WO2022053160A1 (en) * 2020-09-14 2022-03-17 Huawei Technologies Co., Ltd. Apparatus for feeding two radio waves into an offset reflector

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698001A (en) * 1969-11-11 1972-10-10 Nippon Telegraph & Telephone Frequency group separation filter device using laminated dielectric slab-shaped elements
JPS4891950A (pt) * 1972-03-08 1973-11-29
FR2281660A1 (fr) * 1974-08-09 1976-03-05 Thomson Csf Dispositif muni d'une grille de filtrage
DE2520498C3 (de) * 1975-05-07 1981-05-27 Siemens AG, 1000 Berlin und 8000 München Gassegrain- oder Gregory-Antenne für wenigstens zwei unterschiedliche Frequenzbereiche

Also Published As

Publication number Publication date
US4260993A (en) 1981-04-07
DE2966404D1 (en) 1983-12-22
FR2429505B1 (pt) 1981-11-20
EP0006391A1 (fr) 1980-01-09
FR2429505A1 (fr) 1980-01-18

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