Waveguide radiator feeding reflector aerials - has feed system determining polarisation plane rotatably mounted in rear wall of stationary radiator

摘要

In the rear wall (7) of the waveguide radiator is secured the feeding system (5). The position of the polarisation plane of linearly polarised microwaves is adjustable. The feed system is preferably in the form of a dipole radiator, defining the position of the polarisation plane. The dipole is rotatably mounted in the rear wall. The arrangement is of small dimensions, and requires a drive of a small size so that it is suitable for satellite, radar and direction finding purposes. The direct feed (8) of the dipole radiater may be also rotatably mounted in its rear wall. Its mount (15) in this wall may have a sleeve with contact springs. The mount is preferably a bal bearing (9).