GB1511516A - Antenna system for millimetre or centimetre wave links - Google Patents

Antenna system for millimetre or centimetre wave links

Info

Publication number
GB1511516A
GB1511516A GB3768875A GB3768875A GB1511516A GB 1511516 A GB1511516 A GB 1511516A GB 3768875 A GB3768875 A GB 3768875A GB 3768875 A GB3768875 A GB 3768875A GB 1511516 A GB1511516 A GB 1511516A
Authority
GB
United Kingdom
Prior art keywords
reflector
diodes
primary antenna
alternately
conductive
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
GB3768875A
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 GB1511516A publication Critical patent/GB1511516A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/08—Means for collapsing antennas or parts thereof
    • H01Q1/084—Pivotable antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/08—Means for collapsing antennas or parts thereof
    • H01Q1/081—Inflatable 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
    • H01Q19/10—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
    • H01Q19/12—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 wherein the surfaces are concave
    • H01Q19/13—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 wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • 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
    • 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
    • H01Q3/24—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 orientation by switching energy from one active radiating element to another, e.g. for beam switching

Abstract

1511516 Multi-beam antenna system THOMSON-CSF 12 Sept 1975 [13 Sept 1974] 37688/75 Heading H4A An antenna system for a communication link operating in the millimetric or centimetric wave range comprises a primary antenna and a reflector, both rotatable about a vertical axis, and an arrangment whereby the system is operable selectively in three modes, viz: (I) having the reflector non-operative and the primary antenna with a radiation pattern fixed relative to the primary antenna, (II) having the reflector non-operative and the primary antenna having alternately two radiation patterns with intersecting lobes, (III) having the reflector operative for forming with the primary antenna a highly directional radiation pattern. In the Fig. 1 embodiment, parabolic reflector 1 is hinged at its base and is movable into the upright, operable position by switch-controlled jacks 5, 6. The primary antenna 3, detailed in Fig. 2, has four horns fed via waveguides by the radiating bared end 20 of co-axial cable 8. PIN diodes 41-44 set centrally in respective horn throats, and an offset PIN diode 40 in horn 23, are selectively switchable whereby (a) in mode I no diodes are conductive and all horns are active to give omnidirectional radiation pattern a (Fig. 3) for surveillance purposes, (b) in mode II diodes 42, 43 are conductive and diodes 41, 44 are alternately conductive so that only horns 21 and 24 are active to give overlapping radiation patterns b 1 , b 2 alternately for search of an azimuthal sector, and (c) in mode III diodes 41, 42, 44 are conductive and offset diode 40 is switched on and off repeatedly to give, in conjunction with the nowoperative reflector, narrow-lobe patterns c 1 , c 2 alternately for tracking purposes. The system is useful for communication links between moving vehicles. Fig. 4 shows a second embodiment in which the reflector, 50, is partspherical and is movable to an inoperative position (shown in dotted-line) above the centre of the horn assembly.
GB3768875A 1974-09-13 1975-09-12 Antenna system for millimetre or centimetre wave links Expired GB1511516A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7431149A FR2284998A1 (en) 1974-09-13 1974-09-13 ANTENNA FOR MILLIMETRIC OR CENTIMETRIC WAVE LINKS

Publications (1)

Publication Number Publication Date
GB1511516A true GB1511516A (en) 1978-05-17

Family

ID=9143086

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3768875A Expired GB1511516A (en) 1974-09-13 1975-09-12 Antenna system for millimetre or centimetre wave links

Country Status (5)

Country Link
DE (1) DE2540762A1 (en)
FR (1) FR2284998A1 (en)
GB (1) GB1511516A (en)
IT (1) IT1047101B (en)
NL (1) NL7510757A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2417220A1 (en) * 1978-02-09 1979-09-07 Thomson Csf Transceiver working in hyperfrequency range - has directional aerial with omnidirectional facility for establishing initial contact plane
FR2562724B1 (en) * 1984-04-06 1987-05-29 Thomson Csf ANTENNA REFLECTOR FOR A SPACE ENGINE AND DEVICE FOR THE DEVELOPMENT OF THIS REFLECTOR
WO1989009499A1 (en) * 1988-03-31 1989-10-05 Franz Eisenhofer Antenna arrangement and process for its use
DE4203376C1 (en) * 1992-02-06 1993-04-08 Rohde & Schwarz Gmbh & Co Kg, 8000 Muenchen, De Beaming antenna with adjustable response from switchable lobe patterns - has additional search reflector of smaller dia. assigned to exciter

Also Published As

Publication number Publication date
FR2284998A1 (en) 1976-04-09
IT1047101B (en) 1980-09-10
FR2284998B1 (en) 1978-11-24
DE2540762A1 (en) 1976-03-25
NL7510757A (en) 1976-03-16

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee