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US 4,228,401 AGranted
Communication satellite transponder interconnection utilizing variable bandpass filter
AssigneeCommunications Satellite Corporation
InventorsMarvin R. Wachs, Arnold Berman
Life of this patent
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Abstract
Frequency bands in spot beams received by a satellite transponder are selectively routed to transmitted spot beams. The total band width from each spot beam receiver is divided among a plurality of independently adjustable variable bandpass filters, and the outputs from the selected bandpass filters at each receiver are combined at the spot beam transmitters so that each downlink spectrum is made up of a frequency multiplex of selected bands from each uplink spot beam.
Claims9
A communications satellite transponder comprising:
- means for receiving a plurality of composite signals occupying overlapping frequency bands;
- a plurality of groups of variable bandpass filters, each group of filters receiving a different one of said composite signals from said receiving means, and each filter within each group passing a selected portion of the frequency band of its composite signal;
- and
- combining means for combining the outputs from said variable bandpass filters into a plurality of composite transmission signals occupying overlapping frequency bands.
1 more element
Dependencies are inferred from the claim text.