Dual reflector scanning antenna system

Details Dual reflector scanning antenna system Dual reflector scanning antenna system

H - Electricity

01

Q

H01Q 3/20 (2006.01)

Patent

CA 2068965

ABSTRACT A fixed feed dual reflector scanning antenna system 10 having a low moment of inertia is disclosed herein. The inventive dual reflector antenna system 10 includes an antenna feed structure 16 for emitting electromagnetic radiation. The antenna system 10 further includes a subreflector 12 for redirecting the emitted radiation. The subreflector 12 is intersected by a subreflector longitudinal axis Ls at a rotation point proximate a vertex 20 of the subreflector 12. A main antenna reflec- tor 14 circumscribing a main longitudinal axis Lm projects radiation redirected by the subreflector 12 as an antenna beam. A mechanical arrangement 22 rotates the subreflector 12 about the rotation point so as to vary the angular orientation between the subreflector longitu- dinal axis Ls and the main longitudinal axis Lm. In this manner the antenna beam is scanned relative to the main longitudinal axis Lm.

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