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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/69037
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dc.creatorAline Rocha de Assispt_BR
dc.creatorFernando José da Silva Moreirapt_BR
dc.creatorJosé Ricardo Bergmannpt_BR
dc.date.accessioned2024-06-10T19:22:52Z-
dc.date.available2024-06-10T19:22:52Z-
dc.date.issued2020-
dc.citation.volume19pt_BR
dc.citation.issue2pt_BR
dc.citation.spage177pt_BR
dc.citation.epage190pt_BR
dc.identifier.doihttps://doi.org/10.1590/2179-10742020v19i2813pt_BR
dc.identifier.issn2179-1074pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/69037-
dc.description.resumoThis work investigates an alternative numerical scheme for the solution of an exact formulation based on Geometrical Optics (GO) principles to synthesize offset dual reflector antennas. The technique is suited to solve a second-order nonlinear partial differential equation of the Monge-Ampère type as a boundary value problem. An iterative algorithm based on Newton's method was developed, using axis-displaced confocal quadrics to locally represent the subreflector surface, thus enabling an analytical description of the partial derivatives within the formulation. Such approach reduces discretization errors, as exact expressions for the mapping function and its derivatives are analytically determined. To check the robustness of the methodology, an offset dual-reflector Gregorian antenna was shaped to provide a Gaussian aperture field distribution with uniform phase within a superelliptical contour. The shaped surfaces were further interpolated by quintic pseudo-splines and analyzed by Physical Optics (PO) with equivalent edge currents to validate the synthesis procedure at 11,725 GHz.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.format.mimetypepdfpt_BR
dc.languageporpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA ELETRÔNICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofJournal of Microwaves, Optoelectronics and Electromagnetic Applicationspt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectOffset dual-reflector antennaspt_BR
dc.subjectGeometrical Optics (GO)pt_BR
dc.subjectMonge-Ampère equationpt_BR
dc.subjectAxis-displaced confocal quadricspt_BR
dc.subject.otherMicroondaspt_BR
dc.subject.otherÓticapt_BR
dc.titleGO Synthesis of Offset Dual Reflector Antennas Using Local Axis-Displaced Confocal Quadricspt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.scielo.br/j/jmoea/a/KrRLj8yFDjnFLVtyXkqDRCB/?lang=enpt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-8048-4679pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-9115-9951pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-1433-7865pt_BR
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