| 摘要 |
PROBLEM TO BE SOLVED: To provide a multibeam primary radiator respectively receiving radio waves from geostationary satellites which are arranged close to each other. SOLUTION: The multibeam primary radiator comprises first and second primary horns 16, 18, 20. The first primary horn 16 has an approximately circular base end aperture 22 on its base end part and an approximately circular tip aperture 24 having a diameter larger than that of the base end aperture 22 on a tip part. The second primary horns 18, 20 respectively have approximately circular base end apertures 26, 28 on respective base end parts and tip apertures 30, 32 larger than the base end apertures 26, 28 on respective tip parts. The first and second primary horns 16, 18, 20 are arranged so that the center axes of respective base end apertures are almost parallel and an interval between both the center axes is shorter than the diameter of the base end aperture of the first primary horn 16. COPYRIGHT: (C)2007,JPO&INPIT
|
