The PDC-28394040-01 from Ducommun is a Waveguide Diplexer with Bandwidth 350 MHz, Center Frequency 38.5 GHz / 39.5 GHz, Frequency 38.33 to 38.68 GHz / 39.33 to 39.68 GHz, Frequency Band1 38.33 to 38.68 GHz, Frequency Band2 39.33 to 39.68 GHz. More details for PDC-28394040-01 can be seen below.