Title :
Multi-Region Finite-Difference Time-Domain (MR-FDTD) Based on Domain-Optimal Green´s Functions
Author :
Yuan Qu Lin ; Weile, D.S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Delaware, Newark, DE, USA
fDate :
5/1/2013 12:00:00 AM
Abstract :
A multi-region (MR-) finite-difference time-domain (FDTD) scheme for solving two-dimensional sparsely-populated problems based on domain-optimal Green´s functions is proposed. The scheme uses a discrete Green´s function (DGF) on the FDTD lattice to truncate the local sub-regions and thus reduces reflection error on the local boundary. A continuous Green´s function (CGF) is implemented to pass the influence of external fields into each FDTD region which mitigates the numerical dispersion and anisotropy of standard FDTD. Numerical results will demonstrate the accuracy of this approach.
Keywords :
Green´s function methods; finite difference time-domain analysis; CGF; DGF; FDTD lattice; continuous Green´s function; discrete Green´s function; domain-optimal Green´s functions based two-dimensional sparsely-populated problems; domain-optimal Green´s functions-based MR-FDTD; domain-optimal Green´s functions-based multiregion finite-difference time-domain analysis; local subregions; reflection error; Boundary conditions; Finite difference methods; Green´s function methods; Kernel; Lattices; Magnetic domains; Time domain analysis; Equivalence principle; Green´s function; multi-region FDTD; radiation boundary condition;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2013.2238597
