Gradient-Index-Based Frequency-Coded Retroreflective Lenses for mm-Wave Indoor Localization

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dc.contributor.authorKaděra, Petrcs
dc.contributor.authorJiménez-Sáez, Alejandrocs
dc.contributor.authorBurmeister, Tomcs
dc.contributor.authorLáčík, Jaroslavcs
dc.contributor.authorSchüßler, Martincs
dc.contributor.authorJakoby, Rolfcs
dc.coverage.issue1cs
dc.coverage.volume8cs
dc.date.issued2020-11-23cs
dc.description.abstractThis article introduces retroreflective lenses for millimeter-wave radio-frequency indoor localization. A three-dimensional (3D) gradient-index Luneburg lens is employed to increase radar cross section (RCS) of photonic-crystal high-Q resonators and its performance is compared to conventional radar retroreflectors. A classic Luneburg lens with and without a reflective layer is realized with 25 mm diameter (6.7 lambda(0)), showing a realized gain of 24.6 dBi and a maximum RCS of -9.22 dBm(2) at 80 GHz. The proposed Luneburg lens with embedded high-Q resonators as frequency-coded particles in a photonic crystal structure, operating as a reflective layer, achieved a maximum RCS of -15.84 dBm(2) at the resonant frequency of 76.5 GHz and showed a repeatable response each 18 degrees over +/- 36 degrees in two perpendicular planes. With this high RCS of the Luneburg lens, a maximum readout range of 1.3 m could be achieved compared to 0.15 m without the lens at 76.5 GHz for the same transmit power, receiver sensitivity, and gain of the reader antenna.en
dc.formattextcs
dc.format.extent212765-212775cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationIEEE Access. 2020, vol. 8, issue 1, p. 212765-212775.en
dc.identifier.doi10.1109/ACCESS.2020.3039986cs
dc.identifier.issn2169-3536cs
dc.identifier.orcid0000-0003-4441-5745cs
dc.identifier.orcid0000-0002-8010-6977cs
dc.identifier.other165725cs
dc.identifier.researcheridI-6100-2018cs
dc.identifier.urihttp://hdl.handle.net/11012/196473
dc.language.isoencs
dc.publisherIEEEcs
dc.relation.ispartofIEEE Accesscs
dc.relation.urihttps://ieeexplore.ieee.org/document/9266792cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2169-3536/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectGradient-indexen
dc.subjectluneburg lensen
dc.subjectretroreflective lensen
dc.subjectretroreflectoren
dc.subjectphotonic crystalen
dc.subjectchipless RFIDen
dc.subjectindoor localizationen
dc.subjectmmWaveen
dc.subjectRCS enhancementen
dc.subjectartificial dielectricen
dc.titleGradient-Index-Based Frequency-Coded Retroreflective Lenses for mm-Wave Indoor Localizationen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-165725en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:41:37en
sync.item.modts2025.01.17 15:35:36en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav radioelektronikycs
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