Ray-mode conversion method for high frequency scattering analysis

Ray-mode conversion technique gives us an alternative description for analyzing electromagnetic scattering from open waveguide/resonance structures. For such structures, modal description may be convenient for expressing the field in the internal structures, while ray description would be suitable for the exterior ones. Ray-modal coupling occurs at the aperture, and its mathematical base is given by the Poisson summation formula. In this paper, we shall show some recent development of the ray-mode conversion application to improve the accuracy of the field description by considering the multiple edge interaction and the evanescent modes.