The ZUDC20-0283-S+ from Mini Circuits is a Directional Coupler with Frequency 2 to 8 GHz, Coupling 20 dB, Coupling Variation ±1.0 dB, Directivity 18 to 32 dB, Average Power 50 W. Tags: Module with Connectors. More details for ZUDC20-0283-S+ can be seen below.