Title :
Sparse-matrix methodology for finite-element time-domain modal non-reflecting boundary condition simulations
Author :
Bavelis, K. ; Mias, C.
Author_Institution :
Sch. of Eng., Univ. of Warwick, Coventry, UK
Abstract :
A sparse-matrix finite-element time-domain (FETD) formulation using a modal non-reflecting boundary condition (MNRBC) is proposed for the modelling of plane wave scattering from cylinders of arbitrary cross-section. Unlike the standard FETD-MNRBC formulation, the proposed formulation does not generate full sub-matrices following the discretisation of the boundary integral. Hence, it requires less computation memory than the standard formulation. The accuracy of the proposed sparse-matrix FETD-MNRBC formulation is demonstrated, in two dimensions, by comparing its bistatic scattering width results with those of the standard FETD-MNRBC formulation, the finite-element frequency-domain method and with analytical or published results.
Keywords :
finite element analysis; sparse matrices; time-domain analysis; arbitrary cross-section; bistatic scattering width; boundary integral; computation memory; cylinders; discretisation; finite element frequency domain method; finite element time domain modal nonreflecting boundary condition simulation; plane wave scattering; sparse matrix FETD-MNRBC formulation; sparse matrix finite element time domain formulation; sparse matrix methodology; standard FETD-MNRBC formulation; standard formulation; submatrices;
Journal_Title :
Microwaves, Antennas & Propagation, IET
DOI :
10.1049/iet-map.2011.0057