A novel subgridding scheme based on a combination of the finite-element and finite-difference time-domain methods

Author

Monorchio, A. ; Mittra, R.

Author_Institution

Dept. of Inf. Eng., Pisa Univ., Italy

Volume

46

Issue

9

fYear

1998

fDate

9/1/1998 12:00:00 AM

Firstpage

1391

Lastpage

1393

Abstract

A simple and versatile local mesh refinement scheme, based on the hybridization of the finite-element (FE) and the finite-difference time-domain (FDTD) algorithms, is presented. The scheme achieves considerable flexibility in subgridding by using a transition region between the coarse and fine FDTD grids, meshed according to an unstructured grid, and solved by means of the FE method in the TD. An interpolation scheme in the time domain, which allows the use of different time steps in the coarse and fine mesh regions, is included in the paper

Keywords

electromagnetic wave reflection; electromagnetic wave scattering; finite difference time-domain analysis; interpolation; mesh generation; rectangular waveguides; waveguide theory; coarse FDTD grid; fine FDTD grid; finite-difference time-domain methods; finite-element methods; hybridization; interpolation scheme; local mesh refinement scheme; subgridding scheme; time steps; transition region; unstructured grid; Antennas and propagation; Doppler radar; Extrapolation; Finite difference methods; Finite element methods; Helicopters; Interpolation; Radar cross section; Radar scattering; Time domain analysis;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.719987

Filename

719987