Spurious Fields in Time Domain Computations of Scattering Problems.

Abstract

In this paper two dimensional electromagnetic scattering problems with a time periodic incident field are considered. The scatterer is a perfect conductor, and an artificial boundary condition is used. The large time behavior of solutions, depending on (divergence free) initial conditions, is characterized. It turns out that in addition to the expected time-periodic solution the limiting solution may also contain a spurious stationary field. The source of the stationary field is explained and equations describing it are obtained. Several avoidance strategies are discussed, and numerical comparisons of these techiques are given.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1995
Accession Number
ADA301771

Entities

People

  • Roy Nicolaides
  • Urve Kangro

Tags

DTIC Thesaurus Topics

  • Air Force
  • Boundaries
  • Computations
  • Difference Equations
  • Differential Equations
  • Electric Fields
  • Electromagnetic Scattering
  • Engineering
  • Equations
  • Helmholtz Equations
  • Magnetic Fields
  • Mathematical Analysis
  • Mathematics
  • Scattering
  • Stationary
  • Time Domain
  • Two Dimensional

Fields of Study

  • Mathematics

Readers

  • Control Systems Engineering.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Systems Analysis and Design