Antenna feedhorn having an elliptical radiation pattern

Details Antenna feedhorn having an elliptical radiation pattern Antenna feedhorn having an elliptical radiation pattern

H - Electricity

01

Q

351/30

H01Q 13/02 (2006.01)

Patent

CA 1157146

ABSTRACT OF THE DISCLOSURE An antenna feedhorn having an elliptical radiation pattern which comprises a hybrid mode exciting section and a horn radiator positioned adjac- ent thereto. The adjacent ends of the exciting section and the horn radiation have identical circular cross sections. The other end of the horn radiator has an aperture cross section which comprises a pair of straight, spaced, parallel sides of identical length and a pair of spaced arcuate sides inter- posed between the straight parallel sides, the cross section of the horn rad- iator changing continuously from the end adjacent the exciting section to the aperture end. The horn radiator is further provided with an internal surface having corrugations therein. The depth of the corrugations is constant in each cross sectional plane of the radiator in the portions of the internal sur- face comprising the straight parallel sides, and the depth of the corrugations in each cross sectional plane of the radiator in the portions of the internal surface comprising the arcuate sides decreases, increases or remains unchanged toward the center of the arcuate sides for different embodiments of the in- vention. This antenna feedhorn has a cross-polarization component which is less than the cross-polarization component of an elliptical shaped corrugated horn according to the state of the art.

372523

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