Sistema de alimentación de antenas con dual polarización circular

Abstract

A dual circular polarization feed antenna system for satellite communication is described. It consists of a septum OMT-Polarizer type, and two identical duplexers formed by a plane T-junction and of two iris filters, along with two electric field rotators since the vectors of the electric field in the rectangular ports must be vertical. This 4-port system transmits and receives radio frequency signals in double track in which the transmission Tx is made through two ports having as a access the standard rectangular waveguide WR42 and the reception RX is made also through two ports having as a access the standard rectangular waveguide WR28. To separate the two ways with the circular common port (or rather on the level of the antenna), as well in the transmission as in the reception, we used double circular polarization: right hand circular polarization (RHCP) and left hand circular polarization (LHCP).