Title :
Analysis of waveguide discontinuities using eigenmode expansion
Author :
Othman, M.A. ; Eshrah, Islam A. ; Abuelfadl, Tamer M.
Author_Institution :
Electron. & Electr. Commun. Eng. Dept., Cairo Univ., Cairo, Egypt
Abstract :
A novel semi-analytical modal formalism is developed utilizing known solenoidal and irrotational cavity eigenmodes to solve electromagnetic scattering inside waveguides. The proposed approach is based on the use of modal expansion of fields to solve Maxwell´s equations, in conjunction with a convenient choice of port boundary conditions, which results in an eigenmode projection problem. With the help of the generalized scattering matrix (GSM) approach, waveguides discontinuities loaded with arbitrary dielectric profiles can easily be analyzed. Convergence studies show consistent solutions for a small number of expansion modes.
Keywords :
Maxwell equations; S-matrix theory; electromagnetic wave scattering; waveguide discontinuities; GSM; Maxwell equations; arbitrary dielectric profiles; eigenmode expansion; eigenmode projection problem; electromagnetic scattering; generalized scattering matrix; irrotational cavity eigenmodes; port boundary conditions; semianalytical modal formalism; solenoidal cavity eigenmodes; waveguide discontinuity; Cavity resonators; Eigenvalues and eigenfunctions; Electromagnetic waveguides; Ports (Computers); Surface waves; Transmission line matrix methods; Waveguide discontinuities; Eigenfunctions; Generalized Scattering Matrix (GSM); Modal Expansion;
Conference_Titel :
Microwave Symposium Digest (IMS), 2013 IEEE MTT-S International
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4673-6177-4
DOI :
10.1109/MWSYM.2013.6697659
