The DCE40N-8-12.4-100 from ESJ Technology is a Directional Coupler with Frequency 8 to 12.4 GHz, Coupling 30 dB, Coupling Variation ±1 dB, Directivity 10 dB, Average Power 100 W. Tags: Module with Connectors. More details for DCE40N-8-12.4-100 can be seen below.