Antenna system for hybrid communication satellite

Details Antenna system for hybrid communication satellite Antenna system for hybrid communication satellite

1991-10-04

1993-10-19

Hajec, Donald

Communications: radio wave antennas

Antennas

Wave guide type

343756, 343779, 343DIG2, H01Q 1914

Patent

active

RE0344109

ABSTRACT:
A satellite communications system employs separate subsystems for providing broadcast and point-to-point two-way communications using the same assigned frequency band. The broadcast and point-to-point subsystems employ an integrated satellite antenna system which uses a common reflector (12). The point-to-point subsystem achieves increased communication capacity through the reuse of the assigned frequency band over multiple, contiguous zones (32, 34, 36, 38) covering the area of the earth to be serviced. Small aperture terminals in the zones are serviced by a plurality of high gain downlink fan beams (29) steered in the east-west direction by frequency address. A special beam-forming network (98) provides in conjunction with an array antenna (20) the multiple zone frequency address function. The satellite (10) employs a filter interconnection matrix (90 ) for connecting earth terminals in different zones in a manner which permits multiple reuse of the entire band of assigned frequencies. A single pool of solid state transmitters allows rain disadvantaged users to be assigned higher than normal power at minimum cost. The intermodulation products of the transmitters are geographically dispersed.

REFERENCES:
patent: 3096519 (1963-07-01), Martin
patent: 3102265 (1963-08-01), Moreau et al.
patent: 3898667 (1975-08-01), Raab
patent: 4284992 (1981-08-01), Gans
patent: 4343005 (1982-08-01), Han et al.
patent: 4482897 (1984-11-01), Dragone et al.
patent: 4625214 (1986-11-01), Parekh
patent: 4647938 (1987-03-01), Roederer et al.
Parekh et al, "Advanced Satcom Communication Antennas" IEEE International Conference on Communications 1985, vol. 3 of 3, IEEE, Jun. 1985, pp. 1293-1294.

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