On the Topological Robustness of Vortex Modes at Microwave Frequencies

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dc.contributor.authorBarbuto, Mirko
dc.contributor.authorBassotti, Andrea
dc.contributor.authorAlu, Andrea
dc.contributor.authorBilotti, Filiberto
dc.contributor.authorToscano, Alessandro
dc.coverage.issue3cs
dc.coverage.volume28cs
dc.date.accessioned2020-04-30T11:26:13Z
dc.date.available2020-04-30T11:26:13Z
dc.date.issued2019-09cs
dc.description.abstractVortex fields carrying orbital angular momentum are robust with respect to a wide range of external disturbances and exhibit self-healing properties. These peculiar characteristics have been deeply investigated at optical frequencies but only a few of them have been observed at microwaves. In this paper, we try to partially fill this gap by investigating the topological characteristics of vortex fields radiated by standard patch antennas. In particular, we describe the behavior of a vortex mode when a metallic screen is placed in the near field of the radiating patch. Through a proper set of full-wave numerical simulations, we show that the main characteristics of the vortex mode, i.e. the spiral phase profile and the amplitude null, are preserved even if the overall radiated field is strongly perturbed by the obstacle.en
dc.formattextcs
dc.format.extent499-504cs
dc.format.mimetypeapplication/pdfen
dc.identifier.citationRadioengineering. 2019 vol. 28, č. 3, s. 499-504. ISSN 1210-2512cs
dc.identifier.doi10.13164/re.2019.0499en
dc.identifier.issn1210-2512
dc.identifier.urihttp://hdl.handle.net/11012/186888
dc.language.isoencs
dc.publisherSpolečnost pro radioelektronické inženýrstvícs
dc.relation.ispartofRadioengineeringcs
dc.relation.urihttps://www.radioeng.cz/fulltexts/2019/19_03_0499_0504.pdfcs
dc.rightsCreative Commons Attribution 4.0 International licenseen
dc.rights.accessopenAccessen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectPhase singularitiesen
dc.subjectvortex modesen
dc.subjectantenna radiation patternen
dc.titleOn the Topological Robustness of Vortex Modes at Microwave Frequenciesen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
eprints.affiliatedInstitution.facultyFakulta eletrotechniky a komunikačních technologiícs
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