The MM-BDC-005180-20 from Mountain Microwave Technology is a Directional Coupler with Frequency 0.5 to 18 GHz, Coupling 20 dB, Coupling Variation ±1.5 dB, Directivity 10 dB, Average Power 30 W. Tags: Module with Connectors. More details for MM-BDC-005180-20 can be seen below.