Wide bandwidth multiband feed system with polarization diversity

Details Wide bandwidth multiband feed system with polarization diversity Wide bandwidth multiband feed system with polarization diversity

1987-08-07

1989-07-11

LaRoche, Eugene R.

Geometrical instruments

Scriber

Curved surface

333135, 333110, H01P 1161

Patent

active

048475742

ABSTRACT:
A multiband feed system for a reflector antenna, capable of operating simultaneously at a plurality of separate bands of wide bandwidths and of having both frequency and polarization diversity, comprises a common tapered waveguide for carrying the frequency multiplexed bands and orthomode junctions spaced along the length of the waveguide for coupling signals in a single frequency band in and out of the waveguide. 90.degree. and 180.degree. narrowband polarization devices between the orthomode junctions and the orthomode transducers provide polarization diversity. A dual-depth corrugated flared horn operating in a beamwidth saturation mode with the feed system gives a radiation pattern with low cross-polarization content and nearly equalized subreflector illumination at all bands of operation.

REFERENCES:
patent: 3731236 (1973-05-01), Di Tullio et al.
patent: 3838362 (1974-09-01), Kurtz
patent: 4233576 (1980-11-01), Pelchat
patent: 4367446 (1983-01-01), Hall
patent: 4546471 (1985-10-01), Bui-Hai
patent: 4680558 (1987-07-01), Ghosh et al.

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