Accurate solutions of scattering problems involving low-contrast dielectric objects with surface integral equations

Date
2007
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Source Title
Proceedings of the 2nd European Conference on Antennas and Propagation, EuCAP 2007
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Publisher
Institution of Engineering and Technology
Volume
2007
Issue
11961
Pages
Language
English
Type
Conference Paper
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Abstract

We present the stabilization of the surface integral equations for accurate solutions of scattering problems involving low-contrast dielectric objects. Unlike volume formulations, conventional surface formulations fail to provide accurate results for the scattered fields when the contrast of the object is small. Therefore, surface formulations are required to be stabilized by extracting the nonradiating parts of the equivalent currents. In addition to previous strategies for the stabilization, we introduce a novel procedure called field-based stabilization (FBS) based on using fictitious incident fields and rearranging the right-hand-side of the equations. The results show that the formulations using FBS provide accurate results even for scattering problems involving extremely low-contrast objects, while the extra cost due to the stabilization procedure is negligible.

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Keywords
Dielectrics, Electromagnetic scattering, Multilevel fast multipole algorithm, Surface integral equations, Dielectric objects, Equivalent currents, Incident fields, Scattered field, Scattering problems
Citation
Published Version (Please cite this version)