Title :
Demonstration and suppression of numerical divergence errors in FDTD analysis of practical microwave problems
Author :
Celuch-Marcysiak, M.
Author_Institution :
Inst. of Radioelectron., Warsaw Univ. of Technol., Poland
Abstract :
Field divergence emulation in FDTD is revisited, and new theoretical aspects as well as problems of practical importance are revealed and resolved. Various choices of divergence definition are discussed in terms of their predictive power. It is shown that total FDTD solutions inevitably violate Gauss law in dipole radiation or eigenvalue analysis. The theory of S- and P-eigenmodes is applied to understand these problems and to restore their physical solutions. Recipes for extracting correct radiation efficiency, radiation resistance, Q-factors and modal field patterns in the presence of P-modes are proposed.
Keywords :
Q-factor; eigenvalues and eigenfunctions; electromagnetic field theory; error analysis; finite difference time-domain analysis; FDTD analysis; Gauss law; P-eigenmode; Q-factor; S-eigenmode; dipole radiation; eigenvalue analysis; microwave field divergence; modal field pattern; numerical error; radiation efficiency; radiation resistance; Dispersion; Eigenvalues and eigenfunctions; Emulation; Equations; Error analysis; Finite difference methods; Microwave technology; Q factor; Software packages; Time domain analysis;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1011738
