The ZCDC20-V18443+ from Mini Circuits is a Directional Coupler with Frequency 18 to 44 GHz, Coupling 20 dB, Coupling Variation ±1.2 dB, Directivity 10.0 to 24.1 dB, Average Power 16 W. Tags: Module with Connectors. More details for ZCDC20-V18443+ can be seen below.