The DC20-173202SF from Corech Microwave is a Directional Coupler with Frequency 17.3 to 20.2 GHz, Coupling 20 dB, Coupling Variation ±1 dB (Balance), Directivity 12 dB, Average Power 20 W (CW). Tags: Module with Connectors. More details for DC20-173202SF can be seen below.