04931802 is referenced by 87 patents and cites 6 patents.

On-board satellite switching is performed in three stages, an outer stage of switching on the up-link side for routing the received signals to either demodulators or frequency translators, a first inner stage of switching, preferably a baseband switch and processor, for routing and processing the outputs of the demodulators, a second inner stage of switching, e.g., a microwave switch matrix, for routing the outputs of the frequency translators, and an outer stage on the down-link side for assembling and routing the down-link spot beams. For a multiple hopping-beam system, the outer stages are microwave switch matrices, and for a hybrid scanning-hopping system the outer stages are beam forming matrices. A general purpose modified rearrangeable switch matrix is also disclosed.

Title
Multiple spot-beam systems for satellite communications
Application Number
7/167287
Publication Number
4931802
Application Date
March 11, 1988
Publication Date
June 5, 1990
Inventor
Ramesh K Gupta
Rockville
MD, US
Amir I Zaghloul
Bethesda
MD, US
Christoph E Mahle
Washington
DC, US
John V Evans
Gaithersburg
MD, US
Francois T Assal
Bethesda
MD, US
Agent
Sughrue Mion Zinn Macpeak & Seas
Assignee
Communications Satellite Corporation
IPC
H04B 7/19
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