Fast and accurate solutions of scattering problems involving dielectric objects with moderate and low contrasts

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buir.contributor.authorGürel, Levent
buir.contributor.authorErgül, Özgür
dc.citation.epage64en_US
dc.citation.spage59en_US
dc.contributor.authorErgül, Özgüren_US
dc.contributor.authorGürel, Leventen_US
dc.coverage.spatialİzmir, Turkey
dc.date.accessioned2016-02-08T11:43:30Z
dc.date.available2016-02-08T11:43:30Z
dc.date.issued2007-08en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentComputational Electromagnetics Research Center (BiLCEM)en_US
dc.descriptionDate of Conference: 30-31 Aug. 2007
dc.descriptionConference name: 2007 Computational Electromagnetics Workshop
dc.description.abstractWe consider the solution of electromagnetic scattering problems involving relatively large dielectric objects with moderate and low contrasts. Three-dimensional objects are discretized with Rao-Wilton-Glisson functions and the scattering problems are formulated with surface integral equations. The resulting dense matrix equations are solved iteratively by employing the multilevel fast multipole algorithm. We compare the accuracy and efficiency of the results obtained by employing various integral equations for the formulation of the problem. If the problem size is large, we show that a combined formulation, namely, electric-magnetic current combined-field integral equation, provides faster iterative convergence compared to other formulations, when it is accelerated with an efficient block preconditioner. For low-contrast problems, we introduce various stabilization procedures in order to avoid the numerical breakdown encountered in the conventional surface formulations. © 2007 IEEE.en_US
dc.identifier.doi10.1109/CEM.2007.4387652en_US
dc.identifier.urihttp://hdl.handle.net/11693/27071
dc.language.isoEnglishen_US
dc.publisherIEEE
dc.relation.isversionofhttp://dx.doi.org/10.1109/CEM.2007.4387652en_US
dc.source.title2007 Computational Electromagnetics Workshop, CEM'07en_US
dc.subjectAircraften_US
dc.subjectElectromagnetic wave scatteringen_US
dc.subjectElectromagnetismen_US
dc.subjectFunction evaluationen_US
dc.subjectIterative methodsen_US
dc.subjectMagnetismen_US
dc.subjectScatteringen_US
dc.subjectSolutionsen_US
dc.subjectThree dimensionalen_US
dc.subjectBreakdown (BD)en_US
dc.subjectCombined field integral equation (CFIE)en_US
dc.subjectComputational electromagnetics (CEM)en_US
dc.subjectConvergence (mathematics)en_US
dc.subjectDense matricesen_US
dc.subjectDielectric objectsen_US
dc.subjectElectromagnetic scattering problemsen_US
dc.subjectIn orderen_US
dc.subjectMagnetic currentsen_US
dc.subjectMultilevel fast multipole algorithm (MLFMA)en_US
dc.subjectpreconditioneren_US
dc.subjectProblem sizesen_US
dc.subjectRao-Wilton-Glisson (RWG) functionsen_US
dc.subjectScattering problem (SP)en_US
dc.subjectSurface formulationsen_US
dc.subjectSurface integral equationsen_US
dc.subjectThree-dimensional (3-D) objectsen_US
dc.subjectIntegral equationsen_US
dc.titleFast and accurate solutions of scattering problems involving dielectric objects with moderate and low contrastsen_US
dc.typeConference Paperen_US

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