The PDC-18G40G-10C-SFF-20W from Quantic PMI (Planar Monolithics) is a Directional Coupler with Frequency 18 to 40 GHz, Coupling 10 dB, Coupling Variation ± 1 dB, Frequency Sensitivity ± 1 dB, Directivity 10 dB. Tags: Module with Connectors. More details for PDC-18G40G-10C-SFF-20W can be seen below.