US 6,982,679 B2
Coaxial horn antenna system
Jay A. Kralovec, Melbourne, Fla. (US); Griffin K. Gothard, Satellite Beach, Fla. (US); and Timothy E. Durham, Palm Bay, Fla. (US)
Assigned to Harris Corporation, Melbourne, Fla. (US)
Filed on Oct. 27, 2003, as Appl. No. 10/694,469.
Prior Publication US 2005/0088355 A1, Apr. 28, 2005
Int. Cl. H01Q 13/00 (2006.01)
U.S. Cl. 343—781CA 38 Claims
OG exemplary drawing
 
1. A multi-band antenna system comprising:
a main reflector having a shaped surface of revolution about a boresight axis of said antenna system and being operable at a plurality of frequency bands spectrally offset from each other;
a multi-band feed system for said main reflector comprising a sub-reflector defining a second shaped surface of revolution about said boresight axis of said antenna and a plurality of feed horns decoupled from said sub-reflector;
a first one of said horns installed on said boresight axis at a first location separated by a first gap from a vertex of said sub-reflector, said first horn having a plurality of corrugations defining a profile extending from a throat of said first horn and along a tapered portion of said first horn, said profile shaped for producing a radiation pattern for illuminating said sub-reflector at a first frequency band; and
a second one of said horns installed coaxial within said first one of said horns and separated from said vertex on said boresight axis by a second gap, said second horn configured for producing a radiation pattern illuminating said sub-reflector on a second frequency band spectrally offset from said first frequency band.