Three-dimensional subgridding algorithm for FDTD

Author

Okoniewski, Michal ; Okoniewska, Ewa ; Stuchly, Maria A.

Author_Institution

Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada

Volume

45

Issue

3

fYear

1997

fDate

3/1/1997 12:00:00 AM

Firstpage

422

Lastpage

429

Abstract

In many computational problems solved using the finite-difference time-domain (FDTD) technique, there is a need to model selected volumes with higher resolution than the whole computational space. An efficient algorithm has been developed for this purpose that provides the mesh refinement by the factor of two in each direction. The algorithm can be used in two-dimensional (2-D) and three-dimensional (3-D) problems and provides for subgridding in both space and time. Performance of the 3-D algorithm was tested in waveguides and resonators. A high accuracy and efficiency were observed in all test cases with insignificant (of an order of -60 dB) reflections from mesh interfaces. Practical applications of the algorithm in the analyses of a resonator with a dielectric rod and of a cellular phone behavior in the vicinity of the operator head are also reported

Keywords

cellular radio; dielectric materials; finite difference time-domain analysis; resonators; telephone sets; waveguides; 2D problems; 3D algorithm; 3D problems; FDTD; cellular phone; computational problems; computational space; dielectric rod; finite-difference time-domain; mesh interfaces; mesh refinement; operator head; resonators; three-dimensional subgridding algorithm; waveguides; Algorithm design and analysis; Cellular phones; Dielectrics; Electromagnetic waveguides; Finite difference methods; Grid computing; Interpolation; Reflection; Testing; Time domain analysis;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.558657

Filename

558657