Two Oversize Waveguide-Polarization Diplexers (Short Papers)

Two new types of quasi-optical waveguide-polarization diplexers are described. They are based on the use of a metal grating, or a dielectric plate at Brewster's angle, placed in an oversize circular 3-port junction. Their performances are measured at a wavelength of 4.28 mm in a standard microwave circuit and at 337/spl mu/m with the HCN laser beam.