Title :
A Parameter-Optimized Symplectic FDTD Method Based on the (4,4) Stencil
Author :
Zhuo Su ; Yongqin Yang ; Jundong Tan ; Yunliang Long
Author_Institution :
Dept. of Electron. & Commun. Eng., Sun Yat-sen Univ., Guangzhou, China
Abstract :
A parameter-optimized (4,4) stencil-based symplectic finite-difference time-domain method [PO-SFDTD(4,4)] is proposed to tailor the numerical dispersion behavior according to different specifications such as zero dispersion error at designated directions or zero dispersion anisotropy, either at a certain frequency or for a given bandwidth. The effect of the proposed parameter optimization on numerical stability is also discussed. Compared to the conventional higher-order symplectic methods, the proposed PO-SFDTD(4,4) method yields better flexibility in handling dispersion and anisotropy errors.
Keywords :
finite difference time-domain analysis; numerical stability; optimisation; (4,4) stencil-based parameter-optimized symplectic FDTD method; PO-SFDTD(4,4) method; anisotropy errors; handling dispersion; higher-order symplectic methods; numerical dispersion behavior; numerical stability; parameter-optimized (4,4) stencil-based symplectic finite-difference time-domain method; zero dispersion anisotropy; Anisotropic magnetoresistance; Dispersion; Finite difference methods; Numerical stability; Optimization; Stability analysis; Time-domain analysis; Finite-difference time-domain (FDTD); higher-order method; numerical dispersion; symplectic integrator;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2013.2273071
