The ZFDC-20-5-75 from Mini Circuits is a Directional Coupler with Frequency 100 MHz to 1.5 GHz, Coupling 19.71 to 19.95 dB, Directivity 21.26 to 37.48 dB, Power 1 W, Average Power 1 W. Tags: Module with Connectors. More details for ZFDC-20-5-75 can be seen below.