Time-domain BIE analysis of large three-dimensional electromagnetic scattering problems

A time-domain boundary integral equation (BIE) solution of the magnetic field integral equation (MFIE) for large electromagnetic scattering problems is presented. It employs isoparametric curvilinear quadratic elements to model fields, geometry, and time dependence, eliminating staircasing problems....

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Published in:IEEE transactions on antennas and propagation 1997-05, Vol.45 (5), p.894-901
Main Authors: Bluck, M.J., Walker, S.P.
Format: Article
Language:English
Subjects:
Costs
Electromagnetic analysis
Electromagnetic scattering
Geometry
Integral equations
Magnetic analysis
Magnetic fields
Solid modeling
Stability
Time domain analysis
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description A time-domain boundary integral equation (BIE) solution of the magnetic field integral equation (MFIE) for large electromagnetic scattering problems is presented. It employs isoparametric curvilinear quadratic elements to model fields, geometry, and time dependence, eliminating staircasing problems. The approach is implicit, which seems to provide both stability and permits arbitrary local mesh refinement to model geometrically difficult regions without the significant cost penalty explicit methods suffer. Error dependence on discretization is investigated; accurate results are obtained with as few as five nodes per wavelength. The performance both on large scatterers and on low-radar cross section (RCS) scatterers is demonstrated, including the six wavelength "NASA almond," two spheres, a thirteen wavelength missile, and a "high-Q" cavity.
doi_str_mv 10.1109/8.575643
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subjects Costs
Electromagnetic analysis
Electromagnetic scattering
Geometry
Integral equations
Magnetic analysis
Magnetic fields
Solid modeling
Stability
Time domain analysis
title Time-domain BIE analysis of large three-dimensional electromagnetic scattering problems
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