PO-MLFMA hybrid technique for the solution of electromagnetic scattering problems involving complex targets

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buir.contributor.authorGürel, Levent
buir.contributor.authorErgül, Özgür
dc.citation.issueNumber11961en_US
dc.citation.volumeNumber2007en_US
dc.contributor.authorGürel, Leventen_US
dc.contributor.authorManyas, Alpen_US
dc.contributor.authorErgül, Özgüren_US
dc.coverage.spatialEdinburgh, UKen_US
dc.date.accessioned2016-02-08T11:41:29Zen_US
dc.date.available2016-02-08T11:41:29Zen_US
dc.date.issued2007en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentComputational Electromagnetics Research Center (BiLCEM)en_US
dc.descriptionDate of Conference: 11-16 November 2007en_US
dc.descriptionConference Name: 2nd European Conference on Antennas and Propagation, EuCAP 2007en_US
dc.description.abstractThe multilevel fast multipole algorithm (MLFMA) is a powerful tool for efficient and accurate solutions of electromagnetic scattering problems involving large and complicated structures. On the other hand, it is still desirable to increase the efficiency of the solutions further by combining the MLFMA implementations with the high- frequency techniques such as the physical optics (PO). In this paper, we present our efforts in order to reduce the computational cost of the MLFMA solutions by introducing PO currents appropriately on the scatterer. Since PO is valid only on smooth and large surfaces that are illuminated strongly by the incident fields, accurate solutions require careful choices of the PO and MLFMA regions. Our hybrid technique is useful especially when multiple solutions are required for different frequencies, illuminations, and scenarios, so that the direct solutions with MLFMA become expensive. For these problems, we easily accelerate the MLFMA solutions by systematically introducing the PO currents and reducing the matrix dimensions without sacrificing the accuracy.en_US
dc.identifier.doi10.1049/ic.2007.1167en_US
dc.identifier.urihttp://hdl.handle.net/11693/26994en_US
dc.language.isoEnglishen_US
dc.publisherInstitution of Engineering and Technologyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1049/ic.2007.1167en_US
dc.source.titleProceedings of the 2nd European Conference on Antennas and Propagation, EuCAP 2007en_US
dc.subjectHybrid techniquesen_US
dc.subjectMultilevel fast multipole algorithm (MLFMA)en_US
dc.subjectPhysical optics (PO)en_US
dc.subjectComplex targetsen_US
dc.subjectComplicated structuresen_US
dc.subjectComputational costsen_US
dc.subjectDifferent frequencyen_US
dc.subjectDirect solutionen_US
dc.subjectElectromagnetic scatteringen_US
dc.subjectRadar cross section (RCS)en_US
dc.titlePO-MLFMA hybrid technique for the solution of electromagnetic scattering problems involving complex targetsen_US
dc.typeConference Paperen_US

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