The RFDC1G5G20 from RF-Lambda is a Directional Coupler with Frequency 1.5 to 4.5 GHz, Coupling 19 to 21 dB, Frequency Sensitivity ±0.7 dB, Directivity 20 to 22 dB, Average Power 50 W. Tags: Module with Connectors. More details for RFDC1G5G20 can be seen below.