The ZFDC-20-50+ from Mini Circuits is a Directional Coupler with Frequency 20 MHz to 2 GHz, Coupling 19.14 to 19.4 dB, Directivity 19.19 to 35.01 dB, Power 1 W, Average Power 1 W. Tags: Module with Connectors. More details for ZFDC-20-50+ can be seen below.