The RFDC1M2G20 from RF-Lambda is a Directional Coupler with Frequency 0.1 to 2 GHz, Coupling 18.5 to 21.5 dB, Frequency Sensitivity ±0.7 to ±1 dB, Directivity 20 to 22 dB, Average Power 100 W. Tags: Module with Connectors. More details for RFDC1M2G20 can be seen below.