The PDC-28373840-01 from Ducommun is a Waveguide Diplexer with Bandwidth 350 MHz, Center Frequency 37 GHz / 38 GHz, Frequency 36.83 to 37.18 GHz / 37.83 to 38.18 GHz, Frequency Band1 36.83 to 37.18 GHz, Frequency Band2 37.83 to 38.18 GHz. More details for PDC-28373840-01 can be seen below.