| 摘要 |
PROBLEM TO BE SOLVED: To provide a dual polarization antenna that is useful in a satellite radio communication system and has a low image lobe and a grating lobe. SOLUTION: This invention provides the dual polarization antenna having low side lobes, useful in a satellite radio communication system. The antenna comprises a reflector assembly 12 illuminated by a feed source 11, and the reflector assembly 12 comprises a front reflector 15 that reflects two electromagnetic waves orthogonally polarized and each at a different frequency, an auxiliary reflector 16 that reflects one of the orthogonally polarized electromagnetic waves, and a deflecting surface 13 that totally diffracts the orthogonally polarized electromagnetic wave that passes through the auxiliary reflector 16.
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