The RQT C-Band Feed from ReQuTech AB is a Feed Horn that operates from 5.85 to 6.425 GHz (Tx mode) and 3.625 to 4.2 GHz (Rx mode). This antenna has a mechanically switchable linear/circular polarization with a cross-polarization (LP) of 20 dB. It provides Tx-Rx isolation of 70 dB and has an axial ratio of 2 dB (Tx mode) and 2.5 dB (Rx mode). This feed system is available in a housing with a WR137 flange for Tx and WR229 flange for Rx. The interface to the feed can be adjusted to any C-band circular horn input.