The RFDC6G18G30 from RF-Lambda is a Directional Coupler with Frequency 6 to 18 GHz, Coupling 28.5 to 31.5 dB, Frequency Sensitivity ±0.7 to ±1.0 dB, Directivity 10 to 15 dB, Average Power 250 to 300 W. Tags: Module with Connectors. More details for RFDC6G18G30 can be seen below.