Ground-based antenna for TV reception from geostationary satellite - comprises detector at focal point of parabolic reflector mounted on adjustable stiffening member and bracket

摘要

The waves (2) from a satellite are reflected (4) by a parabolic reflector (3) to a detector (5) at its focal point (F). A waveguide (7) transmits the detected waves to a 5HF box (6) for connection by cable to one or more TV receivers. The reflector has a metallic stiffener (8) at the rear with a rim (12) for welding or rivetting to the reflector. Metallic tabs (13,15) having bases (10,16) are fixed to the stiffener and protrude from it to allow the reflector to pivot at the end of a horizontal fixed arm (17) on the top of a post (18). The lower ear (15) pivots on another arm (20) which is fixed by a bracket assembly (19) to the post. Positioning of this bracket allows the reflector orientation to be adjusted.