The QSDC-6000-18000-50-20-S-1 from Qualwave is a Directional Coupler with Frequency 6000 to 18000 MHz, Coupling 20±0.5 dB, Directivity 15 dB, Average Power 50 W, Insertion Loss 0.6 dB. Tags: Module with Connectors. More details for QSDC-6000-18000-50-20-S-1 can be seen below.