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dc.contributor.advisorDurgin, Gregory D.
dc.contributor.authorMarshall, Blake Ryan
dc.date.accessioned2018-05-31T18:11:58Z
dc.date.available2018-05-31T18:11:58Z
dc.date.created2018-05
dc.date.issued2018-01-03
dc.date.submittedMay 2018
dc.identifier.urihttp://hdl.handle.net/1853/59826
dc.description.abstractThis work introduces an optimal backscatter and energy harvesting solution for radio frequency identification (RFID) by using N antennas with N ports called a staggered patterned and retro-directive (SPAR) tag. By using multiple ports and a unitary scattering matrix on the SPAR tag, the structure is able to create multiple orthogonal radiation patterns to improve range of passive RFID tags. This is demonstrated on a 5.8 GHz RFID tag using a two-element patch antenna array fed by a 90˚ hybrid. In addition to canonical designs, new SPAR structures are hypothesized with optimized size, bandwidth, etc. A co-simulator is developed capable of searching a vast space of possible feed networks with N-by-N ports that meet the requirements of a unitary scattering matrix. A new structure that meets the 2-by-2 SPAR scattering matrix requirements is presented to demonstrate the capabilities of the software. The software can also be generalized to discover new physical structures of larger N−by−N SPAR tags or other microwave devices.
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherGeorgia Institute of Technology
dc.subjectRFID
dc.subjectPassive
dc.subjectEnergy harvesting
dc.subjectPassive RFID
dc.subjectPassive tags
dc.subjectBeam steering
dc.subjectSwitched-beam
dc.subjectPassive beam steering
dc.subjectRetrodirective
dc.subjectBackscatter
dc.subjectRetrodirective backscatter
dc.subjectHybrid
dc.subjectMulti-antenna tags
dc.subjectTag range
dc.subjectRFID range
dc.subjectMicrowave rfid
dc.subjectMicrowaves
dc.subjectOptimizer
dc.subjectOrthogonal radiation patterns
dc.subject5.8GHz RFID
dc.subjectCustom rfid structures
dc.titleStaggered pattern energy harvesting and retro-directive backscatter communications for passive RFID tags and sensors
dc.typeDissertation
dc.description.degreePh.D.
dc.contributor.departmentElectrical and Computer Engineering
thesis.degree.levelDoctoral
dc.contributor.committeeMemberPeterson, Andrew F.
dc.contributor.committeeMemberSteffes, Paul G.
dc.contributor.committeeMemberTentzeris, Manos M.
dc.contributor.committeeMemberRogers, Shawn
dc.contributor.committeeMemberLee, Hoseon
dc.date.updated2018-05-31T18:11:58Z


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