Computer algorithms for the analysis of waveguide ring hybrids

This paper presents very efficient computer algorithms for an IBM PC or equivalent, for the analysis of waveguide hybrids composed of a coaxial or radial cavity and E- or H-plane coupled rectangular waveguide ports. The case of an H-plane coupled cavity with a central coaxial port is also considered. The proposed algorithms are based on a field matching analysis and can determine a full set of scattering parameters for the hybrid at a single frequency point in a matter of seconds. The accuracy is equivalent to that offered by more sophisticated commercial software packages.