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A shaped single reflector offset antenna with low cross-polarization fed by a lens horn

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2 Author(s)
E. Lier ; Martin Marietta Astro Space, Princeton, NJ, USA ; S. A. Skyttemyr

A novel compact primary-fed offset reflector antenna with the potential of radiating circular as well as elliptical beams with low cross-polarization, is proposed. The reflector is fed by a horn with a phase-correcting lens in the aperture. Compared to the dual-reflector offset antenna, the concept is easier to assemble and mechanically more robust. The antenna has been synthesized and analyzed by computer programs resulting from modifications of corresponding PO programs for dual-reflector offset antennas. The synthesized antenna exhibits similar cross-polarization, side-lobe level, and aperture efficiency as those of dual-reflector offset antennas, although the one-to-one correspondence between zero cross-polarization and conformal mapping from the feed to the aperture, is not exactly valid for this approach

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:42 ,  Issue: 4 )