| 摘要 |
PROBLEM TO BE SOLVED: To obtain a horn antenna assembly for radars, radio communications, etc., and their primary radiators, etc., which is rotationally symmetric with a little cross polarization over two sufficiently spaced different wide frequency ranges. SOLUTION: Radio waves excited in the TE11 mode in a radio input part 1 propagate with an inconsistent and continuously varying inclination of their lines S of intersection to a waveguide 5, resulting in higher-order modes such as TM11 mode, TE12 mode, etc., excited in the waveguide 5. A corrugated horn 6 is connected to an opening 2 of the waveguide 5 so as to act as a corrugated horn in a low frequency band, and to excite higher-order modes over a wide band enough to cancel unwanted higher-order modes generated at corrugations in a sufficiently spaced high frequency band. COPYRIGHT: (C)2003,JPO
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