The ZDDC20S-12.4-18-50A from ZTS Technologies is a Directional Coupler with Frequency 12.4 to 18 GHz, Coupling 20 dB, Coupling Variation ±1.25 dB, Directivity 11 dB, Average Power 50 Watts. Tags: Module with Connectors. More details for ZDDC20S-12.4-18-50A can be seen below.