The DC20-170210KF from Corech Microwave is a Directional Coupler with Frequency 17 to 21 GHz, Coupling 20 dB, Coupling Variation ±0.5 dB (Balance), Directivity 16 dB, Average Power 30 W (CW). Tags: Module with Connectors. More details for DC20-170210KF can be seen below.