FR2396434A1 - Cassegrain aerial side lobes suppression - involves auxiliary receiver between directional coupler and comparator - Google Patents

Cassegrain aerial side lobes suppression - involves auxiliary receiver between directional coupler and comparator

Info

Publication number
FR2396434A1
FR2396434A1 FR7720371A FR7720371A FR2396434A1 FR 2396434 A1 FR2396434 A1 FR 2396434A1 FR 7720371 A FR7720371 A FR 7720371A FR 7720371 A FR7720371 A FR 7720371A FR 2396434 A1 FR2396434 A1 FR 2396434A1
Authority
FR
France
Prior art keywords
side lobes
comparator
directional coupler
polarisation
aerial
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.)
Granted
Application number
FR7720371A
Other languages
French (fr)
Other versions
FR2396434B1 (en
Inventor
Yves Commault
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
Priority to FR7720371A priority Critical patent/FR2396434A1/en
Priority to IT50115/78A priority patent/IT1105244B/en
Priority to DE2828807A priority patent/DE2828807C2/en
Publication of FR2396434A1 publication Critical patent/FR2396434A1/en
Application granted granted Critical
Publication of FR2396434B1 publication Critical patent/FR2396434B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H01Q19/195—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 a reflecting surface acts also as a polarisation filter or a polarising device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/001—Crossed polarisation dual antennas

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The aerial can perform polarisation rotation, and has a primary source at the focus of the aerial dish. The primary source is reflecting for waves with a first polarisation, and transparent for waves with a second polarisation, perpendicular to the first. It has further auxiliary receivers whose directional characteristic coincides with the aerial side lobes, and comparators for signals from the Cassegrain aerial and from the auxiliary receivers. The auxiliary receivers have tappings (11, 12) in the primary source (1), which tap circulating waves when receiving waves with the second polarisation. They have a device (21) inserted between the tapping (12) and comparators (22).
FR7720371A 1977-07-01 1977-07-01 Cassegrain aerial side lobes suppression - involves auxiliary receiver between directional coupler and comparator Granted FR2396434A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7720371A FR2396434A1 (en) 1977-07-01 1977-07-01 Cassegrain aerial side lobes suppression - involves auxiliary receiver between directional coupler and comparator
IT50115/78A IT1105244B (en) 1977-07-01 1978-06-30 DEVICE TO DISAPPEAR THE SECONDARY LOBES OF A CASSEGRAIN TYPE AERIAL WITH A POLARIZATION ROTATION
DE2828807A DE2828807C2 (en) 1977-07-01 1978-06-30 Radar-Cassegrain antenna with a primary radiator that is operated with two electromagnetic waves polarized perpendicular to each other

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7720371A FR2396434A1 (en) 1977-07-01 1977-07-01 Cassegrain aerial side lobes suppression - involves auxiliary receiver between directional coupler and comparator

Publications (2)

Publication Number Publication Date
FR2396434A1 true FR2396434A1 (en) 1979-01-26
FR2396434B1 FR2396434B1 (en) 1980-01-18

Family

ID=9192883

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7720371A Granted FR2396434A1 (en) 1977-07-01 1977-07-01 Cassegrain aerial side lobes suppression - involves auxiliary receiver between directional coupler and comparator

Country Status (3)

Country Link
DE (1) DE2828807C2 (en)
FR (1) FR2396434A1 (en)
IT (1) IT1105244B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2511196A1 (en) * 1981-08-07 1983-02-11 Thomson Csf MAIN AND AUXILIARY ANTENNA ASSEMBLY WITH ELECTRONIC SCAN AND RADAR COMPRISING SUCH AN ASSEMBLY

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504835A (en) * 1982-06-15 1985-03-12 The United States Of America As Represented By The Secretary Of The Navy Low sidelobe, high efficiency mirror antenna with twist reflector
EP0372463B1 (en) * 1988-12-05 1994-03-09 European Atomic Energy Community (Euratom) Antenna producing a millimeter wave beam having a gaussian-like distribution

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1316780A (en) * 1962-02-22 1963-02-01 Marconi Wireless Telegraph Co Radar antenna improvements
FR1477571A (en) * 1966-02-25 1967-04-21 Csf Improvements to focusing device antennas

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2511196A1 (en) * 1981-08-07 1983-02-11 Thomson Csf MAIN AND AUXILIARY ANTENNA ASSEMBLY WITH ELECTRONIC SCAN AND RADAR COMPRISING SUCH AN ASSEMBLY
EP0072316A1 (en) * 1981-08-07 1983-02-16 Thomson-Csf Electronic scanning antenna with multiple ports and radar using such antenna

Also Published As

Publication number Publication date
FR2396434B1 (en) 1980-01-18
IT7850115A0 (en) 1978-06-30
DE2828807C2 (en) 1985-09-12
IT1105244B (en) 1985-10-28
DE2828807A1 (en) 1979-01-18

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Legal Events

Date Code Title Description
ST Notification of lapse