The PDC-2G18G-20C-SFF-50W from Quantic PMI (Planar Monolithics) is a Directional Coupler with Frequency 2 to 18 GHz, Coupling 20 dB, Coupling Variation ± 0.7 dB, Frequency Sensitivity ± 0.7 dB (Coupling), Directivity 15 dB. Tags: Module with Connectors. More details for PDC-2G18G-20C-SFF-50W can be seen below.