The PDC-42181940-11 from Ducommun is a Waveguide Diplexer with Bandwidth 400 MHz, Center Frequency 18.2 GHz / 19.2 GHz, Frequency 18 to 18.4 GHz / 19 to 19.4 GHz, Frequency Band1 18 to 18.4 GHz, Frequency Band2 19 to 19.4 GHz. More details for PDC-42181940-11 can be seen below.