Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1979-04-26
1982-02-09
Tubbesing, T. H.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343100SA, H04B 700
Patent
active
043152627
ABSTRACT:
The present invention relates to a satellite communication system comprising a plurality of limited scan spot beams which permits high transponder utilization efficiency by virtue of pooling the resources of each terrestrial footprint. In an embodiment of the invention, a satellite comprises a plurality of transponders, the signals from each transponder being directed via one or more associated scanning beams over a separate limited scanning beam region on the surface of a celestial body. In a preferred arrangement, each of the plurality of scanning spot beams is scanned linearly and parallel to the other scanning spot beams in a manner wherein each of the scanning beams covers a separate one of adjacent bands dividing the overall service region on the celestial body. By proper orientation of each of the scan regions or bands, nearly equal volumes of traffic can be served by each transponder.
REFERENCES:
patent: 3711855 (1973-01-01), Schmidt et al.
patent: 3750175 (1973-07-01), Lockerd et al.
patent: 3928804 (1975-12-01), Schmidt et al.
patent: 4090199 (1978-05-01), Archer
patent: 4188578 (1980-02-01), Reudink et al.
K. G. Schroeder; Characteristics and Applications of Multibeam Spacecraft Antennas; Progress in Astronautics & Aeronautics; 24-26 Apr. 72, vol. 3, pp. 503-531.
W. G. Schmidt et al.; A Satellite Switched SDMA/TDMA System for a Wideband Multibeam Sattelite; International Conf. on Comm.; 11-13 Jun. 73; vol. 1, pp. 12-7 to 12-12.
D. O. Reudink et al.; A Scanning Spot Beam Sattelite System; Oct. 77; Bell System Tech. Jour., vol. 56, No. 8, pp. 1549-1560.
A. Acampora et al.; Efficient Utilization of Sattelite Transponders Via Time Division Multibeam Scanning; Oct. 78, Bell Sys. Tech. Jour., vol. 57, No. 8, pp. 2901-2914.
Acampora Anthony
Reudink Douglas O.
Bell Telephone Laboratories Incorporated
Pfeifle Erwin W.
Tubbesing T. H.
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