Title :
A simple way to model curved metal boundaries in FDTD algorithm avoiding staircase approximation
Author :
Mezzanotte, Paolo ; Roselli, Luca ; Sorrentino, Roberto
Author_Institution :
Inst. of Electron., Perugia Univ., Italy
fDate :
8/1/1995 12:00:00 AM
Abstract :
The conventional FDTD algorithm in Cartesian coordinates uses staircase approximation to treat curvilinear surfaces. This approximation causes loss of accuracy often unacceptable. An extremely simple and more accurate polygonal approximation of curved surfaces is proposed in this paper. The method improves significantly the accuracy of the original FDTD algorithm, without increasing its complexity
Keywords :
cavity resonators; finite difference time-domain analysis; waveguide theory; FDTD algorithm; curved metal boundaries; curvilinear surfaces; polygonal approximation; Approximation algorithms; Computational efficiency; Finite difference methods; Integral equations; Maxwell equations; Microwave theory and techniques; Surface fitting; Surface treatment; Testing; Time domain analysis;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
