The QSDC-1000-18000-50-20-S from Qualwave is a Directional Coupler with Frequency 1000 to 18000 MHz, Coupling 20±1 dB, Directivity 12 dB, Average Power 50 W, Insertion Loss 1.2 dB. Tags: Module with Connectors. More details for QSDC-1000-18000-50-20-S can be seen below.