The D30N020400 from Fujian MIcable is a Directional Coupler with Frequency 2 to 40 GHz, Coupling 30 dB, Coupling Variation ±0.8 dB, Amplitude Flatness ±1.1 dB, Directivity 10 to 16 dB. Tags: Module with Connectors. More details for D30N020400 can be seen below.