The 4016D-6 from Narda-MITEQ is a Directional Coupler with Frequency 12.4 to 18 GHz, Coupling 6 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.50 dB, Directivity 15 dB. Tags: Module with Connectors. More details for 4016D-6 can be seen below.