The ZDC20K-26-40-20A from ZTS Technologies is a Directional Coupler with Frequency 26 to 40 GHz, Coupling 20 dB, Coupling Variation ±1 dB, Directivity 10 dB, Average Power 20 Watts. Tags: Module with Connectors. More details for ZDC20K-26-40-20A can be seen below.