K&L Microwave’s E-band diplexer consists of two waveguide bandpass filters specially designed to pass a relatively wide portion of the spectrum, from 71 to 76 GHz and 81 to 86 GHz. Using the propagation of a specific combination of modes, the diplexer is designed to provide a minimum of 15 dB return loss without any tuning. Waveguide interface flanges are WR-12.