The CD0.5-18-20-30 from Analog Microwave Design is a Directional Coupler with Frequency 500 MHz to 18 GHz, Coupling 20 dB, Directivity 12 dB, Average Power 30 W, Peak Power 3000 W. Tags: Module with Connectors. More details for CD0.5-18-20-30 can be seen below.