| 摘要 |
Satellite radio ground station antenna arrangement operating on the Cassegrain principle. In the case of a Cassegrain antenna, which is supplied by a beam waveguide and can be pivoted about an azimuth and an elevation rotation axis (11, 10), and whose supply input/output is located in a fixed-position operating space (12), the supply system consists of an excitation horn radiator (5), whose supply side projects into an operating space projection (15), in the azimuth rotation axis (11), a deflection mirror (8) in the azimuth rotation axis and two deflection mirrors (6, 7) in the elevation rotation axis (11). The three deflection mirrors (6, 7, 8) and the catchment and main reflector (3, 1) are supported by means of a holding device (17, 18) as an entity, such that they can rotate about the azimuth rotation axis. The main reflector, the catchment reflector and the deflection mirror (6), which is located behind a central main reflector opening (4) and, in radiation terms, follows the catchment reflector, are jointly articulated on the holding device in order to rotate about the elevation rotation axis. The design measures according to the invention allow satellite tracking of the antenna in relatively large spatial angle ranges. The antenna arrangement according to the invention is suitable for satellite radio ground stations having antenna reflectors with a relatively large diameter. <IMAGE>
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