MULTIPLE SPOT-BEAM SYSTEMS FOR SATELLITE COMMUNICATIONS
Assignee
COMMUNICATIONS SATELLITE CORPORATION
Filed
Mar 11, 1988
Granted
Jun 5, 1990
Location
Bethesda MD (defense contractors)
Abstract
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.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Oct 3, 1988
Rescinded
Sep 14, 1989
Duration
11 months
Inventor
- 1FRANCOIS T. ASSAL
Sensitive facility: Bethesda MD (defense contractors)
Technology Domains
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Record Details
- Patent number
- US 4931802
- Application
- 07167287
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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