The RFDDC8G18G30 from RF-Lambda is a Dual Directional Coupler with Coupling 29 to 31 dB, Frequency 8 to 18 GHz, Peak Power 1 kW, Average Power 300 W, Insertion Loss 0.2 to 0.4 dB. Tags: Module with Connectors. More details for RFDDC8G18G30 can be seen below.