Title :
Elimination of spurious solutions associated with exact transparent boundary conditions in FDTD solvers
Author :
Lu, Mingyu ; Shanker, Balasubramanian ; Michielssen, Eric
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
Abstract :
An analysis of spurious solutions that often plague finite-difference time-domain solvers supplemented with certain transparent boundary conditions (TBC) is presented. It is shown that the electric- and magnetic-field TBC kernels may support undesired spurious modes. A combined-field TBC kernel is proposed that does not allow for the buildup of resonant modes. Its functionality is demonstrated by two numerical examples.
Keywords :
boundary-value problems; computational electromagnetics; finite difference time-domain analysis; resonance; FDTD solver spurious solution elimination; combined-field TBC kernel; computational electromagnetics; electric-field TBC kernels; finite-difference time-domain solvers; magnetic-field TBC kernels; resonant modes; spurious modes; transparent boundary conditions;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2004.827892
