The ZUDC20-02183-S+ from Mini Circuits is a Directional Coupler with Frequency 2 to 18 GHz, Coupling 20 dB, Coupling Variation ±1.5 dB, Directivity 15 to 25 dB, Average Power 20 W. Tags: Module with Connectors. More details for ZUDC20-02183-S+ can be seen below.