The D30N005180 from Fujian MIcable is a Directional Coupler with Frequency 0.5 to 18 GHz, Coupling 30 dB, Coupling Variation ±0.8 dB, Amplitude Flatness ±1 dB, Directivity 14 to 16 dB. Tags: Module with Connectors. More details for D30N005180 can be seen below.