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Electromagnetic scattering from conductor‐coated material bodies
Author(s) -
Analoui Morteza,
Kagawa Yukio
Publication year - 1991
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.1660040404
Subject(s) - scattering , integral equation , galerkin method , method of moments (probability theory) , conductor , electrical conductor , perfect conductor , dielectric , mathematical analysis , boundary value problem , materials science , cross section (physics) , radar cross section , physics , optics , geometry , mathematics , composite material , finite element method , statistics , optoelectronics , quantum mechanics , estimator , thermodynamics
Abstract A moment method solution is presented to compute electromagnetic scattering from material bodies. The bodies are supposed to be homogeneous, arbitrarily shaped and lossy; they can be coated with very thin perfect conductors in some parts. A formulation of the scattering problem is made in terms of the equivalent surface current densities for which mixed potentials are used. The equivalent currents are expanded in the space‐domain by a triangular expansion function on the triangulated surfaces of the scatterer. The Galerkin procedure is carried out to test boundary integral equations and reduce the functional form of the equations to a partitioned matrix equation. The solution is applied to the scattering problem of a dielectric slab, a thin conductor coated by absorber material and a rectangular patch on a grounded dielectric slab. The computed backscattering radar cross‐section and surface current densities of the structures are presented and some of the results are compared with experimental data.