The DOT200100 from NETA Communications is a Orthomode Transducer with Frequency Tx : 29 to 30 GHz/RX : 19.2 to 20.2 GHz, Cross Polarization 30 dB, Insertion Loss 0.1 to 0.15 dB, Isolation 30 dB, Return Loss 15 to 20 dB (RX, TX). More details for DOT200100 can be seen below.