Telecommunications – Carrier wave repeater or relay system – Portable or mobile repeater
Patent
1988-06-14
1989-09-19
Griffin, Robert L.
Telecommunications
Carrier wave repeater or relay system
Portable or mobile repeater
455 11, 455 15, 455 17, 342354, 342356, H04B 714
Patent
active
048688860
ABSTRACT:
In antenna arrays having normally unexcited or little-excited elements, a technique for configuring the array to provide both global and spot beam coverage, wherein the normally unexcited or little-excited elements are excited at a higher level, together with other normally excited elements to provide spot beam coverage, the normally unexcited elements being left unexcited to provide global beam coverage. Ring redundancy configurations for amplifiers in a transponder provided in the configuration are optimized to minimize additional hardware requirements. The specific example of the INMARSAT II satellite system is discussed.
REFERENCES:
patent: 3331071 (1967-07-01), Webb
patent: 4070637 (1978-01-01), Assal et al.
patent: 4163943 (1979-08-01), Acampora et al.
patent: 4259741 (1981-03-01), Kawai
patent: 4503436 (1985-03-01), Cramer, Jr.
E. W. Matthews et al., Technology Considerations for the Use of Multiple Beam Antenna Systems in Communication Satellites Conference 1979, IEE MTT-5 International Microwave Symposium 5/79 Digest, Orlando, Fla., USA (Apr. 30-May 2, 1979) pp. 125-127.
Assal Francois T.
Zaghloul Amir I.
Communication Satellite Corporation
Griffin Robert L.
Ricci Michael
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