The RFDC6G18G20-H from RF-Lambda is a Directional Coupler with Frequency 6 to 18 GHz, Coupling 19 to 21 dB, Frequency Sensitivity ±0.3 to ±0.5 dB, Directivity 10 to 12 dB, Average Power 50 W. Tags: Module with Connectors. More details for RFDC6G18G20-H can be seen below.