The D20N010400 from Fujian MIcable is a Directional Coupler with Frequency 1 to 40 GHz, Coupling 20 dB, Coupling Variation ±0.7 dB, Amplitude Flatness ±1 dB, Directivity 10 to 13 dB. Tags: Module with Connectors. More details for D20N010400 can be seen below.