GB1534487A - Microwave transmission devices - Google Patents

Microwave transmission devices

Info

Publication number
GB1534487A
GB1534487A GB4359177A GB4359177A GB1534487A GB 1534487 A GB1534487 A GB 1534487A GB 4359177 A GB4359177 A GB 4359177A GB 4359177 A GB4359177 A GB 4359177A GB 1534487 A GB1534487 A GB 1534487A
Authority
GB
United Kingdom
Prior art keywords
fed
differing
sources
oct
earth
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
GB4359177A
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.)
Societe des Telephones Ericsson SA
Original Assignee
Societe des Telephones Ericsson 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 Societe des Telephones Ericsson SA filed Critical Societe des Telephones Ericsson SA
Publication of GB1534487A publication Critical patent/GB1534487A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/2041—Spot beam multiple access
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/007—Antennas or antenna systems providing at least two radiating patterns using two or more primary active elements in the focal region of a focusing 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
    • H01Q3/245—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 in the focal plane of a focussing device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Radio Relay Systems (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

1534487 Aerials MATRA 19 Oct 1977 [22 Oct 1976] 43591/77 Heading H4A An aerial system particularly suitable for use in a geosynchronous satellite comprises a reflector 11 fed by offset primary sources 12, 13, 14 and 15 such as horns such that each primary source illuminates a predetermined portion of the earth's surface. The primary sources are fed by respective multiplexers 16, 25, 26, 27 each in the form of a set of band-pass filters for frequency channels F 1 to F n . Frequencies F 1 to F n are supplied by respective transmitters and fed to the multiplexers by switches and power dividers so arranged that differing frequency channels feed a differing predetermined primary source or sources and hence illuminate differing portions of the earth's surface, see Fig. 3 (not shown).
GB4359177A 1976-10-22 1977-10-19 Microwave transmission devices Expired GB1534487A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7631936A FR2368836A1 (en) 1976-10-22 1976-10-22 SWITCHABLE MULTI-BEAM RADIO-ELECTRIC HYPERFREQUENCY TRANSMISSION DEVICE

Publications (1)

Publication Number Publication Date
GB1534487A true GB1534487A (en) 1978-12-06

Family

ID=9179111

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4359177A Expired GB1534487A (en) 1976-10-22 1977-10-19 Microwave transmission devices

Country Status (5)

Country Link
DE (1) DE2747391A1 (en)
FR (1) FR2368836A1 (en)
GB (1) GB1534487A (en)
IT (1) IT1117657B (en)
SE (1) SE437749B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461605A (en) * 1966-11-04 1969-08-19 Lawrence E Stanhope Greenhouse
DE3402659A1 (en) * 1984-01-26 1985-08-01 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn REFLECTOR ANTENNA FOR OPERATION IN MULTIPLE FREQUENCY RANGES
AU614041B2 (en) * 1988-03-18 1991-08-15 Alcatel N.V. An antenna which is electronically reconfigurable in transmission
WO2018106474A1 (en) * 2016-12-08 2018-06-14 At&T Intellectual Property I, L.P. Frequency selective multi-feed dielectric antenna system and methods for use therewith

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471361A (en) * 1982-09-23 1984-09-11 Rca Corporation Phase reconfigurable beam antenna system
FR2560446B1 (en) * 1984-01-05 1986-05-30 Europ Agence Spatiale POWER DISTRIBUTOR FOR MULTI-BEAM ANTENNA WITH SHARED SOURCE ELEMENTS
FR2670052B1 (en) * 1990-11-29 1993-07-30 Alcatel Espace RECONFIGURABLE EMISSION ANTENNA.
US5289193A (en) * 1990-11-29 1994-02-22 Alcatel Espace Reconfigurable transmission antenna
FR2684809B1 (en) * 1991-12-09 1994-01-21 Alcatel Espace MULTI-BEAM PASSIVE ANTENNA WITH CONFORMITY REFLECTOR (S).

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1288858A (en) * 1961-02-15 1962-03-30 Csf Antenna capable of transmitting several beams simultaneously or successively
US3618097A (en) * 1963-06-17 1971-11-02 Raytheon Co Antenna array system
US3711855A (en) * 1969-10-15 1973-01-16 Communications Satellite Corp Satellite on-board switching utilizing space-division and spot beam antennas
US3710281A (en) * 1970-12-10 1973-01-09 Itt Lossless n-port frequency multiplexer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461605A (en) * 1966-11-04 1969-08-19 Lawrence E Stanhope Greenhouse
DE3402659A1 (en) * 1984-01-26 1985-08-01 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn REFLECTOR ANTENNA FOR OPERATION IN MULTIPLE FREQUENCY RANGES
AU614041B2 (en) * 1988-03-18 1991-08-15 Alcatel N.V. An antenna which is electronically reconfigurable in transmission
WO2018106474A1 (en) * 2016-12-08 2018-06-14 At&T Intellectual Property I, L.P. Frequency selective multi-feed dielectric antenna system and methods for use therewith
US10938108B2 (en) 2016-12-08 2021-03-02 At&T Intellectual Property I, L.P. Frequency selective multi-feed dielectric antenna system and methods for use therewith

Also Published As

Publication number Publication date
SE437749B (en) 1985-03-11
FR2368836B1 (en) 1981-02-27
IT1117657B (en) 1986-02-17
FR2368836A1 (en) 1978-05-19
DE2747391A1 (en) 1978-04-27
SE7711893L (en) 1978-06-14

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Legal Events

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