A Coarse-fine mesh approach for improved solution of 3-D inverse problems in unbounded media

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dc.contributor.authorAydoğan, Ahmet
dc.contributor.authorKılıç, Emre
dc.contributor.authorTaygur, Mehmet Mert
dc.contributor.authorEibert, Thomas F.
dc.date.accessioned2022-02-15T16:57:21Z
dc.date.available2022-02-15T16:57:21Z
dc.date.issued2020
dc.departmentBakırçay Üniversitesien_US
dc.description14th European Conference on Antennas and Propagation (EuCAP) -- MAR 15-20, 2020 -- Copenhagen, DENMARKen_US
dc.description.abstractA coarse-fine mesh approach is proposed to enhance the inverse scattering method for a three-dimensional problem. The problem is decomposed into exterior and interior problems to reduce the computational cost by invoking the equivalence principle. The exterior radiation problem is formulated by a boundary integral equation which enables to estimate the unknown surface current densities. The estimated current densities form the boundary conditions of the interior problem to extract the dielectric profile. The interior problem is formulated by the finite element technique and solved by the Gauss-Newton method. The associated surfaces and volumes are respectively discretized by triangular and tetrahedral meshes in the decomposed problems. The interior problem is solved with increasingly finer meshes and restricted iteration numbers for the coarser meshes. The exterior problem is solved for each mesh to form the boundary conditions with the associated discretization while the extracted profile in the previous step is used as the initial solution in the interior problem.en_US
dc.description.sponsorshipTUBITAK (The Scientific and Technological Research Council of Turkey)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [2219]en_US
dc.description.sponsorshipThis study is financially supported by TUBITAK (The Scientific and Technological Research Council of Turkey) under 2219 - Research Programme.en_US
dc.identifier.isbn978-88-31299-00-8
dc.identifier.issn2164-3342
dc.identifier.urihttps://hdl.handle.net/20.500.14034/119
dc.identifier.wosWOS:000564218700113en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.publisherIEEEen_US
dc.relation.journal2020 14Th European Conference On Antennas And Propagation (Eucap 2020)en_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectinverse scattering problemsen_US
dc.subjectfinite element methoden_US
dc.subjectboundary integral equationen_US
dc.subjectmesh refinementen_US
dc.subjectFinite-Elementen_US
dc.titleA Coarse-fine mesh approach for improved solution of 3-D inverse problems in unbounded mediaen_US
dc.typeConference Objecten_US

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