The D10N180400 from Fujian MIcable is a Directional Coupler with Frequency 18 to 40 GHz, Coupling 10 dB, Coupling Variation ±0.7 dB, Amplitude Flatness ±0.7 dB, Directivity 12 to 14 dB. Tags: Module with Connectors. More details for D10N180400 can be seen below.