The numerical dispersion of the finite-difference timedomain 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.
- Finite-difference time-domain method (fdtd)
- Least square method
ASJC Scopus subject areas
- Electrical and Electronic Engineering