Antenna feed and reflector antenna system and a receiver low noise, both with such antenna feed.

An antenna feed for use in a system for receiving orthogonal polarized signals linearly or circularly, the antenna feed comprising an antenna feed (14; 32) body for coupling to a waveguide housing (12), the feed body (14; 32) a feeder cross-type (10; 30; 70; 78; 94) and defining a central axis 16 and having spaced arms (20; 34) extending radially outwardly from the central axis (16 ) for receiving the polarized signals, said spaced arms (20 being; 34) separated by an air gap, said type feed being cross (10; 30; 70; 78; 94) arranged with a beam to illuminate a reflector plate (54) for receiving said polarized signals.