A new scheme for combining numerical and analytical methods for rigorous analysis of waveguide circuits

A novel scheme is proposed for rigorous analysis of waveguide circuits which are composed of a number of discontinuities. The scheme combines numerical techniques with analytical techniques, such as the mode-matching method. For a general complicated segment of the waveguide circuit, a numerical technique is used to generate the multimode general scattering matrix, while the mode-matching technique is used to deal with all the regular discontinuities. The final result is obtained by cascading the general scattering matrices. To validate the scheme, a numerical example is given. The results obtained with the proposed scheme agree very well with results obtained using full numerical techniques and experimental results.<>