Satellite-radio ground-station antenna arrangement operating on the Cassegrain principle

摘要

A satellite-radio ground-station antenna arrangement operating on the Cassegrain principle. In a centrally supplied Cassegrain antenna which can be pivoted about an azimuth and an elevation rotation axis (4, 5) and whose input/output is level with the ground or can be reached via a short stairway (7) from a fixed-position operating space (6) by a short route via a small intermediate chamber (9) which can be air-conditioned and is closed to the exterior, first wall parts of this chamber are constructed, such that they can move around the azimuth rotation axis, in the manner of a bellows (11), a louvre, a rotating cylinder or a rotating couple, and second wall parts can be displaced during the elevation rotation movement of the antenna which is hinged on the intermediate chamber, like a louvre (21). The structural measures according to the invention allow satellite tracking 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