The DC10-450550EF from Corech Microwave is a Directional Coupler with Frequency 45 to 55 GHz, Coupling 10 dB, Coupling Variation ±1 dB (Balance), Directivity 8 to 10 dB, Average Power 20 W (CW). Tags: Module with Connectors. More details for DC10-450550EF can be seen below.