The D30N180500 from Fujian MIcable is a Directional Coupler with Frequency 18 to 50 GHz, Coupling 30 dB, Coupling Variation ±0.8 dB, Amplitude Flatness ±0.9 dB, Directivity 8 to 10 dB. Tags: Module with Connectors. More details for D30N180500 can be seen below.