The D20N180500 from Fujian MIcable is a Directional Coupler with Frequency 18 to 50 GHz, Coupling 20 dB, Coupling Variation ±0.8 dB, Amplitude Flatness ±0.7 dB, Directivity 8 to 10 dB. Tags: Module with Connectors. More details for D20N180500 can be seen below.