The QSDC-17000-22000-30-20-S from Qualwave is a Directional Coupler with Frequency 17000 to 22000 MHz, Coupling 20±1 dB, Directivity 14 dB, Average Power 30 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for QSDC-17000-22000-30-20-S can be seen below.