Title :
Application of the nonuniform FDTD technique to analysis of coaxial discontinuity structures
Author :
Yu, Wenhua ; Mittra, Raj ; Dey, Supriyo
Author_Institution :
Electromagn. Commun. Lab., Pennsylvania State Univ., University Park, PA, USA
fDate :
1/1/2001 12:00:00 AM
Abstract :
In this paper, we employ the nonuniform finite-difference time-domain (NUFDTD) technique to accurately model discontinues in complex coaxial configurations. We take advantage of the azimuthal symmetry of the structure to reduce the original problem into an equivalent two-dimensional one, and we do this by projecting the three-dimensional Yee cell onto two-dimensional planes. Numerical results are presented for various discontinuities to illustrate the application of the method. We show that the NUFDTD technique yields results that are in excellent agreement with the mode-matching method
Keywords :
coaxial waveguides; finite difference time-domain analysis; waveguide components; waveguide discontinuities; waveguide theory; 3D Yee cell projection; azimuthal symmetry; coaxial discontinuity structures; complex coaxial configurations; equivalent 2D problem; nonuniform FDTD technique; nonuniform finite-difference time-domain technique; two-dimensional planes; Coaxial components; Computational geometry; Computational modeling; Equations; Finite difference methods; Finite element methods; Frequency; Mode matching methods; Solid modeling; Time domain analysis;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
