Title :
Least Square Method to Optimize the Coefficients of Complex Finite-Difference Space Stencils
Author :
Yang, Bo ; Balanis, Constantine A.
Author_Institution :
Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ
Abstract :
The numerical dispersion of the finite-difference time-domain methods can be lowered by using the complex space stencils. Properly adjusting the coefficients of the space stencils results in a further dispersion reduction. However, it is not trivial to determine the optimal values of the coefficients. This paper uses the least square method to optimize various finite-difference stencils. The method is validated by the numerical analysis
Keywords :
computational electromagnetics; finite difference methods; least squares approximations; optimisation; complex finite-difference space stencils; computational electromagnetics; finite-difference time-domain methods; least square method; numerical dispersion reduction; Computational electromagnetics; Dispersion; Electromagnetic propagation; Finite difference methods; Frequency; Helium; Least squares methods; Numerical analysis; Optimization methods; Time domain analysis; Dispersion; finite-difference time-domain method (FDTD); least square method; optimization;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2006.885012
