The RFDDC2G8G20 from RF-Lambda is a Dual Directional Coupler with Coupling 19 to 21 dB, Frequency 2 to 8 GHz, Peak Power 0.5 kW, Average Power 50 W, Insertion Loss 0.3 to 0.5 dB. Tags: Module with Connectors. More details for RFDDC2G8G20 can be seen below.