The ZUDC20-183+ from Mini Circuits is a Directional Coupler with Frequency 0.5 18 GHz, Coupling 20 dB, Coupling Variation ±2 dB, Directivity 12 to 22 dB, Average Power 10 to 50 W. Tags: Module with Connectors. More details for ZUDC20-183+ can be seen below.