专利内容由知识产权出版社提供
专利名称：Satellite communications system having
frequency addressable high gain downlinkbeams
发明人：Harold A. Rosen申请号：US06/6982申请日：19860814公开号：US04823341A公开日：190418
摘要：A satellite communications employs separate subsystems for providingbroadcast and point-to-point two-way communications using the same assignedfrequency band. The broadcast and point-to-point subsystems employ an integratedsatellite antenna system which uses a common reflector (12). The point-to-point
subsystem achieves increased communication capacity through the reuse of the assignedfrequency band over multiple, contiguous zones (32, 34, 36, 38) covering the area of theearth to be serviced. Small aperture terminals in the zones are serviced by a plurality ofhigh gain downlink fan beams (29) steered in the east- west direction by frequencyaddress. A special beam-forming network (98) provides in conjunction with an arrayantenna (20) the multiple zone frequency address function. The satellite (10) employs afilter interconnection matrix (90) for connecting earth terminals in different zones in amanner which permits multiple reuse of the entire band of assigned frequencies. A singlepool of solid state transmitters allows rain disadvantaged users to be assigned higherthan normal power at minimum cost. The intermodulation products of the transmittersare geographically dispersed.
申请人：HUGHES AIRCRAFT COMPANY
代理人：M. J. Meltzer,A. W. Karambelas
更多信息请下载全文后查看
