Second-order absorbing boundary conditions for TLM analysis of open region scattering problems

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Abstract

A set of second-order absorbing boundary conditions is derived for the three-dimensional finite-difference TLM analysis of open region scattering problems. These boundary conditions are implemented into a computer code using a two-level discretization scheme. A simulation experiment using a 4-term Blackman-Harris pulse excitation with very low sidelobes is used to examine the efficiency of the boundary conditions. It is observed that the absorbing boundaries are perfectly transparent to waves impinging upon them at angles between 0 and 45 degrees, and the normal incidence reflection coefficient is less than -35 dB.

Original languageEnglish (US)
Pages (from-to)651-671
Number of pages21
JournalInternational Journal of Infrared and Millimeter Waves
Volume19
Issue number4
DOIs
StatePublished - Jan 1 1998

All Science Journal Classification (ASJC) codes

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Electrical and Electronic Engineering

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