GB1163310A - Improvements in Antennas, particularly in Antennas for Surveillance Radars - Google Patents

Improvements in Antennas, particularly in Antennas for Surveillance Radars

Info

Publication number
GB1163310A
GB1163310A GB5534166A GB5534166A GB1163310A GB 1163310 A GB1163310 A GB 1163310A GB 5534166 A GB5534166 A GB 5534166A GB 5534166 A GB5534166 A GB 5534166A GB 1163310 A GB1163310 A GB 1163310A
Authority
GB
United Kingdom
Prior art keywords
reflector
radiators
horn
primary
towards
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
GB5534166A
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston 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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Publication of GB1163310A publication Critical patent/GB1163310A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2658—Phased-array fed focussing structure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/12—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems
    • H01Q3/16—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device
    • H01Q3/18—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device wherein the primary active element is movable and the reflecting device is fixed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

1,163,310. Aerials. COMPAGNIE FRANCAISE THOMSON HOUSTON - HOTCHKISS BRANDT. 9 Dec., 1966 [23 Dec., 1965], No. 55341/66. Heading H4A. In an aerial system comprising a primary feed illuminating a double curvature reflector, that is, a reflector having two curved portions each governed by a separate law, the primary feed has means for controlling the radiation direction from the reflector while maintaining the or each phase centre of the feed substantially in a fixed position relative to the reflector. In one embodiment a horn-type primary radiator 1, Fig. 4a, is tiltable about a horizontal axis 15 passing through its phase centre, so that its direction of maximum radiation may be aimed either towards the lower parabolic portion of a reflector 2, or towards the upper convex portion thereof. The horn is fed from a fixed waveguide or coaxial line 13 via a flexible connection 14. In another embodiment a primary source is constituted by three fixed horn or dielectric rod radiators 10, 11, 12, Fig. 5, the radiators 11, 12 being symmetrically disposed about the radiator 10. The three radiators are fed in parallel, but equal and opposite phase shifts may be imposed upon the radiators 11, 12 by adjustable phase shifters 5, 6 so that the direction of maximum radiation towards a reflector 2 may be aimed as required. The shape of the radiation pattern of the aerial system of a radar installation may be adjusted by the means described, to reduce interference from jamming or ground reflections. Such adjustment may be effected during rotation of the aerial system, at appropriate angles, using servo-control of the means for tilting the direction of maximum radiation of the primary source thereof.
GB5534166A 1965-12-23 1966-12-09 Improvements in Antennas, particularly in Antennas for Surveillance Radars Expired GB1163310A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR43488A FR1472126A (en) 1965-12-23 1965-12-23 Improvements to antennas, in particular to antennas for surveillance radars

Publications (1)

Publication Number Publication Date
GB1163310A true GB1163310A (en) 1969-09-04

Family

ID=8596601

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5534166A Expired GB1163310A (en) 1965-12-23 1966-12-09 Improvements in Antennas, particularly in Antennas for Surveillance Radars

Country Status (4)

Country Link
AT (1) AT269224B (en)
DE (1) DE1541475A1 (en)
FR (1) FR1472126A (en)
GB (1) GB1163310A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2268834A (en) * 1980-12-04 1994-01-19 Racal Mesl Ltd Radar arrangements and methods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7902009A (en) * 1979-03-14 1980-09-16 Hollandse Signaalapparaten Bv RADAR SYSTEM.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2268834A (en) * 1980-12-04 1994-01-19 Racal Mesl Ltd Radar arrangements and methods
GB2268834B (en) * 1980-12-04 1994-06-22 Racal Mesl Ltd Radar arrangements and methods of detecting different types of targets
US5477224A (en) * 1980-12-04 1995-12-19 Racal (Newbridge) Limited Radar arrangements and methods

Also Published As

Publication number Publication date
DE1541475A1 (en) 1969-10-23
FR1472126A (en) 1967-03-10
AT269224B (en) 1969-03-10

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees