GB1534487A - Microwave transmission devices - Google Patents
Microwave transmission devicesInfo
- 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
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)
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (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).
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)
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)
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 |
US5289193A (en) * | 1990-11-29 | 1994-02-22 | Alcatel Espace | Reconfigurable transmission antenna |
FR2670052B1 (en) * | 1990-11-29 | 1993-07-30 | Alcatel Espace | RECONFIGURABLE EMISSION ANTENNA. |
FR2684809B1 (en) * | 1991-12-09 | 1994-01-21 | Alcatel Espace | MULTI-BEAM PASSIVE ANTENNA WITH CONFORMITY REFLECTOR (S). |
Family Cites Families (4)
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 |
-
1976
- 1976-10-22 FR FR7631936A patent/FR2368836A1/en active Granted
-
1977
- 1977-10-19 GB GB4359177A patent/GB1534487A/en not_active Expired
- 1977-10-21 SE SE7711893A patent/SE437749B/en not_active IP Right Cessation
- 1977-10-21 IT IT959977A patent/IT1117657B/en active
- 1977-10-21 DE DE19772747391 patent/DE2747391A1/en not_active Ceased
Cited By (5)
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 |
DE2747391A1 (en) | 1978-04-27 |
FR2368836B1 (en) | 1981-02-27 |
IT1117657B (en) | 1986-02-17 |
FR2368836A1 (en) | 1978-05-19 |
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 |