The ZCDC13-K1844+ from Mini Circuits is a Directional Coupler with Frequency 18 to 40 GHz, Coupling 13 dB, Coupling Variation ±1.8 dB, Directivity 10 to 22 dB, Average Power 20 W. Tags: Module with Connectors. More details for ZCDC13-K1844+ can be seen below.