Antenna system with plural horn feeds

Details Antenna system with plural horn feeds Antenna system with plural horn feeds

1985-06-17

1985-12-17

Lieberman, Eli

Communications: radio wave antennas

Antennas

With means for moving directive antenna for scanning,...

343781CA, H01Q 1914

Patent

active

045595402

ABSTRACT:
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.

REFERENCES:
patent: 1932469 (1933-10-01), Leib et al.
patent: 3680141 (1972-07-01), Karikomi
patent: 4062018 (1977-12-01), Yokoi
patent: 4186402 (1980-01-01), Mizusawa et al.
patent: 4260993 (1981-04-01), Aubry et al.

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