The DC20-010400KF from Corech Microwave is a Directional Coupler with Frequency 1 to 40 GHz, Coupling 20 dB, Coupling Variation ±1 dB (Balance), Directivity 10 dB, Average Power 20 W (CW). Tags: Module with Connectors. More details for DC20-010400KF can be seen below.