Reflector-type microwave antennas with absorber lined conical fe

Details Reflector-type microwave antennas with absorber lined conical fe Reflector-type microwave antennas with absorber lined conical fe

1981-05-26

1983-10-18

Moore, David K.

Communications: radio wave antennas

Antennas

Wave guide type

343781R, H01Q 1300

Patent

active

044108923

ABSTRACT:
A feed horn for a reflector-type microwave antenna comprises a smooth-walled conical horn and a lining of absorber material on the inside wall of the horn for reducing the width of the RPE (radiation pattern envelope) in the E plane of the antenna. The lining of absorber material extends from the wide end of the conical feed toward the narrow end thereof, terminating at a point where the horn diameter is about 7 times the longest wavelength of the microwave signals being transmitted. The width of the RPE in the E-plane of the antenna can be reduced to be nearly equal to the width of the RPE of the H-plane of the antenna without significantly degrading this H-plane RPE from its shape without absorber and without significantly changing the gain of the antenna.

REFERENCES:
patent: 3550142 (1970-12-01), Dawson
patent: 3936837 (1976-02-01), Coleman et al.
patent: 4249183 (1981-02-01), Hai
"The Electrical Characteristics of the Conical Horn-Reflector Antenna", The Bell System Technical Journal, Jul. 1963, pp. 1187-1211.

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