The XMADC50-1-4-20S from XMA Corporation is a Directional Coupler with Frequency 1 to 4 GHz, Coupling 20 dB, Directivity 20 dB, Average Power 50 W, Insertion Loss 0.4 dB. Tags: Module with Connectors. More details for XMADC50-1-4-20S can be seen below.