The ZADC-20-18-75+ from Mini Circuits is a Directional Coupler with Frequency 800 MHz to 1.75 GHz, Coupling 19.75 to 20.4 dB, Directivity 15.32 to 29.14 dB, Power 1 W, Average Power 1 W. Tags: Module with Connectors. More details for ZADC-20-18-75+ can be seen below.