H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
H01Q 1/28 (2006.01) H01Q 19/19 (2006.01) H01Q 21/28 (2006.01) H01Q 25/00 (2006.01)
Patent
CA 2293185
An antenna system comprising a feed array, a subreflector and a main reflector which are oriented to define a offset gregorian antenna geometry. The feed array is comprised of a plurality of separate feeds which are aligned on a predetermined contour. Each feed array is coupled to a feed network which acts to combine the illumination beams of clusters of a preselected number of feeds to produce a plurality of composite illumination beams. Each composite illumination beam is directed to be incident upon a separate predetermined location on the subreflector which directs the composite illumination beams and directed towards the main reflector. Each composite illumination beam is reflected by the main reflector in a preselected direction so that each composite illumination beam forms an antenna beam that impinges a predetermined coverage area on the Earth. Each antenna beam defines a separate coverage cell in the coverage area, wherein the position and orientation of the feeds, the subreflector and the main reflector provides antenna beams over a full Earth field of view coverage area where each antenna beam is approximately symmetrically shaped.
Chandler Charles W.
Junker Gregory P.
Peebles Ann L.
Gowling Lafleur Henderson Llp
Northrop Grumman Corporation
Trw Inc.
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