The RFDC3G11G20B from RF-Lambda is a Directional Coupler with Frequency 3 to 12 GHz, Coupling 19 to 21 dB, Frequency Sensitivity ±0.7 to ±1 dB, Directivity 12 to 15 dB, Average Power 400 W. Tags: Module with Connectors. More details for RFDC3G11G20B can be seen below.