The ZDC10K-18-40-10A from ZTS Technologies is a Directional Coupler with Frequency 18 to 40 GHz, Coupling 10 dB, Coupling Variation ±1.25 dB, Directivity 9 dB, Average Power 10 Watts. Tags: Module with Connectors. More details for ZDC10K-18-40-10A can be seen below.