The QSDC-18000-40000-20-6-K from Qualwave is a Directional Coupler with Frequency 18000 to 40000 MHz, Coupling 6±0.7 dB, Directivity 12 dB, Average Power 20 W, Insertion Loss 2.6 dB. Tags: Module with Connectors. More details for QSDC-18000-40000-20-6-K can be seen below.