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dc.contributor.authorErgül, Ö.en_US
dc.contributor.authorGürel, L.en_US
dc.date.accessioned2016-02-08T10:09:58Z
dc.date.available2016-02-08T10:09:58Z
dc.date.issued2008en_US
dc.identifier.issn0018-926X
dc.identifier.urihttp://hdl.handle.net/11693/23178
dc.description.abstractThe solution of scattering problems involving low-contrast dielectric objects with three-dimensional arbitrary shapes is considered. Using the traditional forms of the surface integral equations, scattered fields cannot be calculated accurately if the contrast of the object is low. Therefore, we consider the stabilization of the formulations by extracting the nonradiating parts of the equivalent currents. We also investigate various types of stable formulations and show that accuracy can be improved systematically by eliminating the identity terms from the integral-equation kernels. Traditional and stable formulations are compared, not only for small scatterers but also for relatively large problems solved by employing the multilevel fast multipole algorithm. Stable and accurate solutions of dielectric contrasts as low as 104 are demonstrated on problems involving more than 250000 unknowns.en_US
dc.language.isoEnglishen_US
dc.source.titleIEEE Transactions on Antennas and Propagationen_US
dc.relation.isversionofhttp://doi.org/10.1109/TAP.2008.916971en_US
dc.subjectDielectricsen_US
dc.subjectElectromagnetic scatteringen_US
dc.subjectMultilevel fast multipole algorithm (MLFMA)en_US
dc.subjectSurface integral equationsen_US
dc.titleStabilization of integral-equation formulations for the accurate solution of scattering problems involving low-contrast dielectric objectsen_US
dc.typeArticleen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentComputational Electromagnetics Research Centeren_US
dc.citation.spage799en_US
dc.citation.epage805en_US
dc.citation.volumeNumber56en_US
dc.citation.issueNumber3en_US
dc.identifier.doi10.1109/TAP.2008.916971en_US
dc.publisherInstitute of Electrical and Electronics Engineersen_US
dc.identifier.eissn1558-2221


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