Impedance boundary conditions for transient scattering problems

Author

Ida, Nathan ; Yuferev, Sergei

Author_Institution

Akron Univ., OH, USA

Volume

33

Issue

2

fYear

1997

fDate

3/1/1997 12:00:00 AM

Firstpage

1444

Lastpage

1447

Abstract

The approximate boundary conditions for the tangential component of the electric field and normal component of the magnetic field on the surface of a homogeneous body of finite conductivity (conductor or lossy dielectric) are derived for transient incident electromagnetic field. Scale factors for basic variables are introduced in such a way, that a small parameter, proportional to the ratio of the penetration depth and body´s characteristic size, appears in the dimensionless Maxwell´s equations for the conducting region and then the perturbation method is used. The use of the boundary conditions together with space-time domain surface integral equations for electric and magnetic fields is proposed. A numerical example is included to illustrate the theory

Keywords

Maxwell equations; electric fields; electric impedance; electromagnetic wave scattering; integral equations; magnetic fields; time-domain analysis; transient analysis; Maxwell´s equations; approximate boundary conditions; characteristic size; conducting region; conductor; electric fields; finite conductivity; homogeneous body; impedance boundary conditions; lossy dielectric; magnetic fields; normal component; penetration depth; perturbation method; ratio; scale factors; space-time domain surface integral equations; tangential component; transient incident electromagnetic field; transient scattering problems; Boundary conditions; Conductivity; Conductors; Dielectric losses; Electromagnetic fields; Electromagnetic scattering; Electromagnetic transients; Magnetic fields; Maxwell equations; Surface impedance;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.582531

Filename

582531