H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
H01Q 1/28 (2006.01) H01Q 3/00 (2006.01) H01Q 19/17 (2006.01) H01Q 19/19 (2006.01) H01Q 25/00 (2006.01)
Patent
CA 2293506
An antenna system comprising a feed array, a subreflector and a main reflector which are oriented to define a folded optics antenna geometry. The feed array is comprised of a plurality of separate feeds which are aligned on a predetermined contour. Each feed is coupled to a feed network which acts to combine the illumination beams 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 illumination beams 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 adjacent, antenna beams over a full Earth field of view coverage area where each antenna beam is approximately symmetrically shaped.
Broas Romulo F. J.
Brundrett David L.
Chandler Charles W.
Wu Te-Kao
Gowling Lafleur Henderson Llp
Northrop Grumman Corporation
Trw Inc.
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