Antenna system for different frequency bands

Details Antenna system for different frequency bands Antenna system for different frequency bands

H - Electricity

01

Q

351/58

H01Q 21/30 (2006.01) H01Q 3/24 (2006.01) H01Q 5/00 (2006.01) H01Q 19/17 (2006.01) H01Q 19/18 (2006.01) H01Q 19/19 (2006.01)

Patent

CA 1184651

ABSTRACT OF THE DISCLOSURE An antenna system having a main reflector, a sub- reflector, and a plurality of horns for radiating different frequencies includes a beam waveguide system which cancels cross polarization otherwise inherent in the system. If the antenna system uses a non-rotationally-symmetric sub-reflector the cross polarization caused thereby is cancelled by the beam waveguide system having at least two focusing reflectors and selected parameters. Alternatively the beam waveguide system can be used with a rotationally symmetric and stationary sub-reflector by being positioned to reflect said beam on the axis of the main reflector. Either the horns or the focusing reflectors may be rotatably switched, the other group being stationary.

384673

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