The DCE20S-0.5-6 from ESJ Technology is a Directional Coupler with Frequency 0.5 to 6 GHz, Coupling 20 dB, Coupling Variation ±1 dB, Directivity 18 dB, Average Power 30 W. Tags: Module with Connectors. More details for DCE20S-0.5-6 can be seen below.