Circularly polarized receive/transmit elliptic feed horn...

Details Circularly polarized receive/transmit elliptic feed horn... Circularly polarized receive/transmit elliptic feed horn...

2006-02-21

2006-02-21

Wimer, Michael C. (Department: 2828)

Communications: radio wave antennas

Antennas

Wave guide type

C343S786000

Reexamination Certificate

active

07002528

ABSTRACT:
The present invention provides a feed horn for use in an antenna assembly having a non-circular reflector. The feed horn is capable of transmitting and receiving circularly polarized signals. The feed horn includes a circular waveguide section for connection to a transmitter and receiver of the antenna assembly. A conical waveguide section is connected to an opposed end of the circular waveguide section for creating a smooth transition from the circular waveguide section to a non-circular corrugated waveguide section. The corrugated waveguide section includes a plurality of corrugations that transition for a circular shape adjacent to the conical waveguide section to an increasing non-circular shape at an end proximal to the reflector of the antenna assembly. The corrugations have individuals depths defined in the inner wall of the corrugated waveguide section. These depths compensate circularly polarized signals propagating in the feed horn for distortions due to the non-circular reflector.

REFERENCES:
patent: 4356495 (1982-10-01), Morz
patent: 4472721 (1984-09-01), Morz et al.
patent: 4673905 (1987-06-01), Yamawaki et al.
patent: 5552797 (1996-09-01), Cook
patent: 5614916 (1997-03-01), Mizuguchi
patent: 6005528 (1999-12-01), Preiss et al.

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