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

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      Author(s)
      Ergül, Özgür
      Gürel, Levent
      Date
      2007
      Source Title
      Proceedings of the 2nd European Conference on Antennas and Propagation, EuCAP 2007
      Publisher
      Institution of Engineering and Technology
      Volume
      2007
      Issue
      11961
      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.
      Keywords
      Dielectrics
      Electromagnetic scattering
      Multilevel fast multipole algorithm
      Surface integral equations
      Dielectric objects
      Equivalent currents
      Incident fields
      Scattered field
      Scattering problems
      Permalink
      http://hdl.handle.net/11693/26958
      Published Version (Please cite this version)
      http://dx.doi.org/10.1049/ic.2007.1148
      Collections
      • Computational Electromagnetics Research Center (BiLCEM) 84
      • Department of Electrical and Electronics Engineering 3702
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