Novel electromagnetic surface integral equations for highly accurate computations of dielectric bodies with arbitrarily low contrasts

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2008-12-01

Author

Ergül, Özgür Salih

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We present a novel stabilization procedure for accurate surface formulations of electromagnetic scattering problems involving three-dimensional dielectric objects with arbitrarily low contrasts. Conventional surface integral equations provide inaccurate results for the scattered fields when the contrast of the object is low, i.e., when the electromagnetic material parameters of the scatterer and the host medium are close to each other. We propose a stabilization procedure involving the extraction of nonradiating currents and rearrangement of the right-hand side of the equations using fictitious incident fields. Then, only the radiating currents are solved to calculate the scattered fields accurately. This technique can easily be applied to the existing implementations of conventional formulations, it requires negligible extra computational cost, and it is also appropriate for the solution of large problems with the multilevel fast multipole algorithm. We show that the stabilization leads to robust formulations that are valid even for the solutions of extremely low-contrast objects.

Subject Keywords

Physics and Astronomy (miscellaneous), Computer Science Applications

URI

https://hdl.handle.net/11511/47795

Journal

JOURNAL OF COMPUTATIONAL PHYSICS

DOI

https://doi.org/10.1016/j.jcp.2008.08.004

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Department of Electrical and Electronics Engineering, Article

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Citation Formats

Ö. S. Ergül, “Novel electromagnetic surface integral equations for highly accurate computations of dielectric bodies with arbitrarily low contrasts,” JOURNAL OF COMPUTATIONAL PHYSICS, pp. 9898–9912, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47795.