The QSDC-8000-18000-50-30-N from Qualwave is a Directional Coupler with Frequency 8000 to 18000 MHz, Coupling 30±1.8 dB, Directivity 12 dB, Average Power 50 W, Insertion Loss 0.6 dB. Tags: Module with Connectors. More details for QSDC-8000-18000-50-30-N can be seen below.