The RFDDC2G18G30 from RF-Lambda is a Dual Directional Coupler with Coupling 29 to 31 dB, Frequency 2 to 18 GHz, Peak Power 0.5 kW, Average Power 50 W, Insertion Loss 0.6 to 1 dB. Tags: Module with Connectors. More details for RFDDC2G18G30 can be seen below.