The QSDC-12000-18000-50-30-S from Qualwave is a Directional Coupler with Frequency 12000 to 18000 MHz, Coupling 30±1 dB, Directivity 12 dB, Average Power 50 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for QSDC-12000-18000-50-30-S can be seen below.