The ZCDC20-18263-S+ from Mini Circuits is a Directional Coupler with Frequency 18 to 26.5 GHz, Coupling 20 dB, Directivity 14.0 to 24 dB, Power 20 W, Average Power 20 W. Tags: Module with Connectors. More details for ZCDC20-18263-S+ can be seen below.