The RFDC2G18G16 from RF-Lambda is a Directional Coupler with Frequency 2 to 18 GHz, Coupling 16 dB, Frequency Sensitivity ±0.5 to ±0.7 dB, Directivity 12 to 16 db, Average Power 50 W. Tags: Module with Connectors. More details for RFDC2G18G16 can be seen below.