Title :
The wave-equation FD-TD method for the efficient eigenvalue analysis and S-matrix computation of waveguide structures
Author :
Krupezevic, Dragan V. ; Brankovic, Veselin J. ; Arndt, Fritz
Author_Institution :
Microwave Dept., Bremen Univ., Germany
fDate :
12/1/1993 12:00:00 AM
Abstract :
A modified finite-difference-time-domain (FDTD) formulation based on the direct discretization of the vector wave-equation is applied to the efficient analysis of hybrid-mode waveguiding structures. For both 3-D and 2-D waveguide eigenvalue problems, the formulation requires only one grid, and just the solution of three coupled equations is necessary. Numerical examples concerning the resonant frequencies for an inhomogeneously filled waveguide resonator as well as the fundamental- and higher-order-mode propagation factors for insulated image guides, shielded coupled dielectric guides, and lateral open dielectric ridge guides demonstrate the efficiency of the method. The theory is verified by comparison with results obtained by other methods
Keywords :
S-matrix theory; S-parameters; dielectric waveguides; dielectric-loaded waveguides; eigenvalues and eigenfunctions; finite difference time-domain analysis; rectangular waveguides; resonators; waveguide theory; S-matrix computation; coupled equations; eigenvalue analysis; finite-difference-time-domain formulation; higher-order-mode propagation factors; hybrid-mode waveguiding structures; inhomogeneously filled waveguide resonator; insulated image guides; lateral open dielectric ridge guides; numerical examples; rectangular waveguides; resonant frequencies; scattering parameters; shielded coupled dielectric guides; wave-equation FD-TD method; waveguide structures; Dielectrics; Eigenvalues and eigenfunctions; Finite difference methods; Loaded waveguides; Partial differential equations; Rectangular waveguides; Scattering parameters; Slabs; Time domain analysis; Waveguide discontinuities;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
