| Abstract | An antenna having variable polarization capability, using a parabolic reflector 22 feet in diameter, has been developed for the S-band radar operated by the Alberta Hail Studies Research Project. Transmission on an arbitrarily assigned polarization, and reception on the transmitted polarization and the orthogonal polarization simultaneously is possible. Flexible operation results from the possibility of choosing any axial ratio and the causing the polarization ellipse to rotate at a fixed rate. Polarization purity is obtained by use of a dual-mode feed horn, resulting in an integrated cancellation ratio on circular polarization of 34db. Other antenna characteristics are: beamwidth, 1.15°; gain, 43.2 db; azimuth sidelobes, -23db; elevation sidelobes, -30 db. |
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