The DCE30N-1-8-300 from ESJ Technology is a Directional Coupler with Frequency 1 to 6 GHz, Coupling 30 dB, Coupling Variation ±1.5 dB, Directivity 16 dB, Average Power 300 W. Tags: Module with Connectors. More details for DCE30N-1-8-300 can be seen below.