The XMADC50-2-18-20S from XMA Corporation is a Directional Coupler with Frequency 2 to 18 GHz, Coupling 20 dB, Directivity 12 dB, Average Power 50 W, Insertion Loss 1.2 dB. Tags: Module with Connectors. More details for XMADC50-2-18-20S can be seen below.