FDTD local grid with material traverse

Author

Chevalier, Michael W. ; Luebbers, Raymond J. ; Cable, Vaughn P.

Author_Institution

Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA

Volume

45

Issue

3

fYear

1997

fDate

3/1/1997 12:00:00 AM

Firstpage

411

Lastpage

421

Abstract

Often, a finite-difference time-domain (FDTD) calculation requires a relatively higher mesh resolution in only small subvolumes of the total mesh space. By locally applying finer grids (local grids) to these volumes, the necessary resolution can be obtained. Computation time and memory requirements may be far less than for an FDTD space with the smaller mesh resolution throughout. In many situations, it is important that these local-grids function when materials traverse the main-grid-local-grid (MG-LG) boundary surfaces, since the volumes that require local grids may not be isolated in a homogeneous medium. A local-grid method, which allows dielectric and/or conducting materials to traverse the boundaries, is developed. Three different FDTD problems that utilize the local-grid method are used as validation tests. Results are compared with uniform mesh FDTD solutions

Keywords

computational complexity; conducting materials; dielectric properties; electromagnetic fields; finite difference time-domain analysis; EM fields; FDTD local grid; boundary surfaces; computation time; conducting materials; dielectric materials; finite-difference time-domain; homogeneous medium; local grid method; material traverse; memory requirements; mesh resolution; uniform mesh FDTD solutions; validation tests; Antenna feeds; Boundary conditions; Conducting materials; Dielectric materials; Finite difference methods; Geometry; Grid computing; Interpolation; Testing; Time domain analysis;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.558656

Filename

558656