Spherical wave representation of the dyadic Green's function for a spherical impedance boss at the edge of a perfectly conducting wedge

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dc.citation.epage1023en_US
dc.citation.spage1019en_US
dc.contributor.authorGhassemiparvin, Behnamen_US
dc.contributor.authorAltıntaş, Ayhanen_US
dc.coverage.spatialMoscow, Russiaen_US
dc.date.accessioned2016-02-08T12:12:13Z
dc.date.available2016-02-08T12:12:13Z
dc.date.issued2012en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionDate of Conference: August 19–23en_US
dc.description.abstractIn this work, canonical problem of a scatterer at the edge of a wedge is considered and eigenfunction solution is developed. Initially, a dyadic Green's function for a spherical impedance boss at the edge of a perfect electrically conducting (PEC) wedge is obtained. Since scattering from objects at the edge is of interest, a three-dimensional Green's function is formulated in terms of spherical vector wave functions. First, an incomplete dyadic Green's function is expanded in terms of solenoidal vector wave functions with unknown coefficients, which is not valid in the source region. Unknown coefficients are calculated by utilizing the Green's second identity and orthogonality of the vector wave functions. Then, the solution is completed by adding general source correction term. Resulting Green's function is decomposed into two parts. First part is the dyadic Green's function of the wedge in the absence of the sphere and the second part represents the effects of the spherical boss and the interaction between the wedge and the scatterer. In contrast to cylindrical vector wave function expansions and asymptotic solutions which fail to converge in the paraxial region, proposed solution exhibits good convergence everywhere in space. Using the developed Green's function scattered field patterns are obtained for several impedance values and results are compared with those of a PEC spherical boss. Effects of the incident angle and surface impedance of the boss on the scattering pattern are also examined.en_US
dc.identifier.issn1559-9450
dc.identifier.urihttp://hdl.handle.net/11693/28140
dc.language.isoEnglishen_US
dc.publisherElectromagnetics Academyen_US
dc.source.titleProgress in Electromagnetics Research Symposiumen_US
dc.subjectAsymptotic solutionsen_US
dc.subjectCanonical problemsen_US
dc.subjectCorrection termsen_US
dc.subjectDyadic green's functionsen_US
dc.subjectEigenfunction solutionen_US
dc.subjectGeneral sourceen_US
dc.subjectIncident anglesen_US
dc.subjectOrthogonalityen_US
dc.subjectParaxialen_US
dc.subjectPerfect electrically conductingen_US
dc.subjectScattered fielden_US
dc.subjectScattering patternen_US
dc.subjectSource regionen_US
dc.subjectSpherical vector wave functionsen_US
dc.subjectSpherical wavesen_US
dc.subjectSurface impedancesen_US
dc.subjectUnknown coefficientsen_US
dc.subjectWave-function expansionen_US
dc.subjectEigenvalues and eigenfunctionsen_US
dc.subjectGreen's functionen_US
dc.subjectScatteringen_US
dc.subjectVector spacesen_US
dc.subjectVectorsen_US
dc.subjectWave functionsen_US
dc.subjectSpheresen_US
dc.titleSpherical wave representation of the dyadic Green's function for a spherical impedance boss at the edge of a perfectly conducting wedgeen_US
dc.typeConference Paperen_US
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