The QSDC-2000-18000-30 from Qualwave is a Directional Coupler with Frequency 2000 to 18000 MHz, Coupling 10, 20, 30 dB, Directivity 10 to 12 dB, Average Power 30 W, Insertion Loss 1 to 1.2 dB. Tags: Module with Connectors. More details for QSDC-2000-18000-30 can be seen below.