The RFDC3G11G40B from RF-Lambda is a Directional Coupler with Frequency 3 to 12 GHz, Coupling 39 to 41 dB, Frequency Sensitivity ±0.5 to ±0.7 dB, Directivity 10 to 12 dB, Average Power 400 W. Tags: Module with Connectors. More details for RFDC3G11G40B can be seen below.