Uniform Surface Integral Equation Formulation for Mixed Impedance Boundary Conditions

Author

Yla-Oijala, Pasi ; Kiminki, Sami P. ; Wallen, Henrik ; Sihvola, Ari

Author_Institution

Dept. of Radio Sci. & Eng., Aalto Univ., Espoo, Finland

Volume

63

Issue

12

fYear

2015

Firstpage

5718

Lastpage

5726

Abstract

A numerical approach based on the surface integral equation (SIE) method is developed for the analysis of time-harmonic electromagnetic scattering by impenetrable objects equipped with mixed impedance boundary conditions (MIBCs). MIBC is an axially anisotropic generalization of the conventional isotropic (Leontovich) impedance boundary condition. The developed SIE formulation utilizes surface Helmholtz decomposition, the self-dual formulation of Yan and Jin, and loop and star RWG functions. A combined field formulation is applied to avoid internal resonances.

Keywords

Helmholtz equations; anisotropic media; electric field integral equations; electromagnetic wave scattering; magnetic field integral equations; MIBC; SIE method; axially anisotropic generalization; impenetrable object; isotropic impedance boundary condition; mixed impedance boundary conditions; numerical approach; resonance; self-dual formulation; star RWG functions; surface Helmholtz decomposition; time-harmonic electromagnetic scattering analysis; uniform surface integral equation; Boundary conditions; Impedance; Integral equations; Mathematical model; Scattering; Surface impedance; Testing; Electromagnetic (EM)??scattering; Electromagnetic scattering; impedance boundary condition; impenetrable object; method of moments; method of moments,; surface Helmholtz decomposition; surface integral equation; surface integral equation (SIE);

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2015.2496100

Filename

7312425