The D20N020180 from Fujian MIcable is a Directional Coupler with Frequency 2 to 18 GHz, Coupling 20 dB, Coupling Variation ±0.5 dB, Amplitude Flatness ±0.5 dB, Directivity 16 to 18 dB. Tags: Module with Connectors. More details for D20N020180 can be seen below.