| 摘要 |
PROBLEM TO BE SOLVED: To provide a feed horn capable of enhancing an antenna gain. SOLUTION: A feed horn unit 2 includes an opening 2a for receiving the input of a radio wave reflected on a parabolic reflection mirror and a waveguide 2b for transporting the radio wave received by the opening 2a to a converter unit 5. Furthermore, a feed horn unit 3 includes an opening 3a for receiving the input of a radio wave reflected on the parabolic reflection mirror and a waveguide 3b for transporting the radio wave received by the opening 3a to the converter unit 5. Moreover, a feed horn unit 4 includes an opening 4a for receiving the input of a radio wave reflected on the parabolic reflection mirror and a waveguide 4b for transporting the radio wave received by the opening 4a to the converter unit 5. The opening of the feed phone unit is directed toward a center position O on a reflection plane of a parabolic reflection mirror 10. Radiation patterns of the feed horn units 2-4 are directed toward the center position on the reflection plane of the parabolic reflection mirror 10 one another, thereby improving the antenna gain for each of the feed horn units 2-4. COPYRIGHT: (C)2008,JPO&INPIT
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