EP0494017A1 - Anordnung, um eine Antenne umfassend gegen elektromagnetische Störungen abzuschirmen - Google Patents

Anordnung, um eine Antenne umfassend gegen elektromagnetische Störungen abzuschirmen Download PDF

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Publication number
EP0494017A1
EP0494017A1 EP91403541A EP91403541A EP0494017A1 EP 0494017 A1 EP0494017 A1 EP 0494017A1 EP 91403541 A EP91403541 A EP 91403541A EP 91403541 A EP91403541 A EP 91403541A EP 0494017 A1 EP0494017 A1 EP 0494017A1
Authority
EP
European Patent Office
Prior art keywords
antenna
envelope
protection system
shielding
support
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.)
Withdrawn
Application number
EP91403541A
Other languages
English (en)
French (fr)
Inventor
Claude Boudet
Bernard Estang
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
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 CSF SA filed Critical Thomson CSF SA
Publication of EP0494017A1 publication Critical patent/EP0494017A1/de
Withdrawn legal-status Critical Current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
    • H01Q1/526—Electromagnetic shields

Definitions

  • the present invention describes a system for the overall protection of an antenna against electromagnetic disturbances.
  • a field of application of the invention relates more precisely to radar or self-directing missile antennas which are orientable along two or three orthogonal axes, and which carry microwave circuits on their rear face.
  • the antenna orientation mechanisms and the boxes containing the microwave circuits are conventionally connected by cables, also called strands, which are the seat of electromagnetic disturbances due mainly to the presence of hostile external emissions (against measures) or not ( radio emission from aircraft or radiation from the radar itself).
  • the object of the invention is to overcome the above drawbacks by proposing overall protection of electronic circuits and electric cables by means of a single envelope reflecting electromagnetic waves, composed of a material which is sufficiently flexible to allow the antenna to perform at least one rotational movement around an axis.
  • the invention relates to a system for protection against electromagnetic disturbances for an antenna arranged on a support and comprising, between its rear part and the support, a set of electronic circuits and electric cables, the antenna being orientable by at minus a rotational movement about an axis, said system being characterized in that it consists of an envelope reflecting electromagnetic waves, fixed on the one hand to the rear part of the antenna and, on the other hand , on the support, and surrounding said assembly, said envelope being flexible enough to allow said rotational movement of the antenna.
  • FIG. 1 represents a possible embodiment of the overall protection according to the invention for an antenna which can be orientated mechanically along two orthogonal axes.
  • Figure 1 shows an antenna 1 formed of a front part 2 and a rear part 3, and arranged on a fixed support 4.
  • the antenna 1 is mechanically orientable using a mechanical conventional antenna (5, 6, 7, 8) whose description does not fall within the scope of the invention.
  • the antenna 1 is orientable along an axis 9 represented by a broken line, with a maximum deviation ß1, and along an axis 10 perpendicular to the plane of the figure, with a maximum deviation ß2.
  • an assembly comprising a housing 11 containing electronic circuits, and electrical cables 12 necessary for the operation of these electronic circuits as well as that of the antenna mechanics (5, 6, 7, 8).
  • the electric cables 12 have, at their ends, parts 13 for resumption of mass towards the housing 11 and the various connected structures (4, 6, 8).
  • the overall protection according to the invention is ensured by a flexible envelope 14, reflecting electromagnetic waves, and fixed to the rear part 3 of the antenna and to the base 15 of the fixed support 4 by any means allowing continuous contact of the envelope 14 with the contour of the rear part 3 and of the base 15, so as to completely surround what is located between the antenna 1 and the base 15 of the support 4.
  • the envelope 14 can be made of a metallized synthetic fabric in order to meet the conditions of flexibility and protection against electromagnetic waves.
  • the casing 14 it is also possible to envisage manufacturing the casing 14 by means of braided metal wires.
  • the metal used will preferably be silver, or any other metal having good conductivity in order to increase the effectiveness of the protection.
  • the system according to the invention significantly reduces the unit costs of making electrical cables and ground recovery parts located at the ends of these cables.
EP91403541A 1991-01-04 1991-12-26 Anordnung, um eine Antenne umfassend gegen elektromagnetische Störungen abzuschirmen Withdrawn EP0494017A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9100073A FR2671433B1 (fr) 1991-01-04 1991-01-04 Systeme de protection globale d'une antenne contre les perturbations electromagnetiques.
FR9100073 1991-01-04

Publications (1)

Publication Number Publication Date
EP0494017A1 true EP0494017A1 (de) 1992-07-08

Family

ID=9408460

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91403541A Withdrawn EP0494017A1 (de) 1991-01-04 1991-12-26 Anordnung, um eine Antenne umfassend gegen elektromagnetische Störungen abzuschirmen

Country Status (2)

Country Link
EP (1) EP0494017A1 (de)
FR (1) FR2671433B1 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1108276B (de) * 1958-03-20 1961-06-08 Nordmende Einrichtung zum Abschirmen gegen hochfrequente elektrische Wellen, insbesondere fuer Empfangsgeraete der drahtlosen Nachrichtentechnik
US3350497A (en) * 1965-08-23 1967-10-31 Craig Systems Corp Shielded passageway interconnection for radio-frequency shelters
DE3330284A1 (de) * 1983-08-22 1985-03-21 Siemens AG, 1000 Berlin und 8000 München Nach dem cassegrain-prinzip arbeitende satellitenfunk-bodenstationsantennenanordnung
US4654469A (en) * 1970-03-25 1987-03-31 The United States Of America As Represented By The Secretary Of The Air Force Special purpose bellows assembly
DE3638123A1 (de) * 1986-11-08 1988-05-19 Bbc Brown Boveri & Cie Vorrichtung zur abschirmung elektronischer geraete zu pruefzwecken gegen feldgebundene elektromagnetische stoerungen
JPS63206005A (ja) * 1987-02-21 1988-08-25 Nippon Telegr & Teleph Corp <Ntt> 回転駆動装置
EP0383657A1 (de) * 1989-02-17 1990-08-22 Thomson-Lgt Laboratoire General Des Telecommunications Antennensystem zum Empfangen von Direkt-Rundfunk-Übertragungs-Satelliten

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1108276B (de) * 1958-03-20 1961-06-08 Nordmende Einrichtung zum Abschirmen gegen hochfrequente elektrische Wellen, insbesondere fuer Empfangsgeraete der drahtlosen Nachrichtentechnik
US3350497A (en) * 1965-08-23 1967-10-31 Craig Systems Corp Shielded passageway interconnection for radio-frequency shelters
US4654469A (en) * 1970-03-25 1987-03-31 The United States Of America As Represented By The Secretary Of The Air Force Special purpose bellows assembly
DE3330284A1 (de) * 1983-08-22 1985-03-21 Siemens AG, 1000 Berlin und 8000 München Nach dem cassegrain-prinzip arbeitende satellitenfunk-bodenstationsantennenanordnung
DE3638123A1 (de) * 1986-11-08 1988-05-19 Bbc Brown Boveri & Cie Vorrichtung zur abschirmung elektronischer geraete zu pruefzwecken gegen feldgebundene elektromagnetische stoerungen
JPS63206005A (ja) * 1987-02-21 1988-08-25 Nippon Telegr & Teleph Corp <Ntt> 回転駆動装置
EP0383657A1 (de) * 1989-02-17 1990-08-22 Thomson-Lgt Laboratoire General Des Telecommunications Antennensystem zum Empfangen von Direkt-Rundfunk-Übertragungs-Satelliten

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 493 (E-697)(3340), 22 décembre 1988; & JP - A - 63206005 (NIPPON TELEGR & TELEPH CORP) 25.08.1988 *
WESCON TECHNICAL PAPERS vol. 27, 1983, pages 1-4, Hollywood, US; J.W. WRIGHT: "Material selection for good EMI-RFI gasket design" *

Also Published As

Publication number Publication date
FR2671433B1 (fr) 1993-08-20
FR2671433A1 (fr) 1992-07-10

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