The D30N005400 from Fujian MIcable is a Directional Coupler with Frequency 0.5 to 40 GHz, Coupling 30 dB, Coupling Variation ±1.2 dB, Amplitude Flatness ±1.5 dB, Directivity 10 to 14 dB. Tags: Module with Connectors. More details for D30N005400 can be seen below.