Title :
Pre-iterative ADI-FDTD method for conductive medium
Author :
Wang, Shumin ; Chen, Ji
Author_Institution :
Kelly Sci. Inc., Bethesda, MD, USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
An efficient accuracy-improvement scheme is proposed to analyze electromagnetic problems with conductive medium. This scheme is based on interpreting the alternating-direction implicit finite-difference time-domain (ADI-FDTD) method as a special iterative solver for the Crank-Nicholson scheme. By applying an additional number of iterations to locations with relatively large field variation, the overall accuracy can be improved with little computational overhead. Special treatment of lossy medium in the ADI-FDTD method is also addressed. Finally, numerical examples demonstrate the effectiveness of the proposed method.
Keywords :
electromagnetic field theory; finite difference time-domain analysis; iterative methods; Crank-Nicholson scheme; alternating-direction implicit finite-difference time-domain method; conductive medium; iterative method; large field variation; splitting error; Computational efficiency; Computational modeling; Dispersion; Electromagnetic analysis; Finite difference methods; Helium; Iterative methods; Relaxation methods; Sparse matrices; Time domain analysis; Alternating-direction implicit finite-difference time-domain (ADI–FDTD) method; conductive medium; iterative method; splitting error;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2005.848086
