Rigorous field theory design of millimeter-wave E-plane integrated circuit multiplexers

The overall field theory designs of two types of quasi-planar millimeter-wave multiplexers utilizing low-cost, low-insertion-loss printed metallic E-plane filters are described. Very compact components are achieved by using E-plane filters printed on a common metal sheet which is directly integrated in the septate sections of an E-plane n-furcated split-block waveguide housing. The second configuration proposed extends the useful principle of waveguide H-plane slit-coupled manifold multiplexers to the case of millimeter-wave printed metallic E-plane filters. Based on the model scattering matrix description of suitable key building blocks, the rigorous simulation technique used comprises the complete multiplexer structure including the E-plane transformer or iris elements, the waveguide E- or H-plane junctions, and the filter sections