dc.contributor.author | Stamenov, Plamen | en |
dc.contributor.author | Ackland, Karl | en |
dc.date.accessioned | 2019-10-25T14:48:15Z | |
dc.date.available | 2019-10-25T14:48:15Z | |
dc.date.issued | 2019 | en |
dc.date.submitted | 2019 | en |
dc.identifier.citation | Stamenov, P. and Ackland, K. and Lotya, M. and Finn, D.J., 4D full-vector radio frequency complex magnetic susceptibility mapping. Near-field imaging of RFID tags, AIP Advances, 9, 3, 2019 | en |
dc.identifier.other | Y | en |
dc.description | PUBLISHED | en |
dc.description | cited By 0 | en |
dc.description.abstract | Radio frequency identification (RFID) is a technology permeating both everyday life and scientific applications alike. The most prolific passive tag-based system uses inductively-powered tags with no internal power source [V. Chawla and D. S. Ha, “An overview of passive RFID,” IEEE Commun. Mag. 45(9), 11–17 (2007)]. Here we demonstrate an inductive magnetic field mapping platform on the example of passive near-field RFID tags (ID-1), operating at 13.56 MHz (HF) [Identification cards - Contactless integrated circuit(s) cards - Proximity cards - Part 1: Physical characteristics, ISO/IEC 14443-1, 2000; Part 2: Radio frequency power and signal interface, ISO/IEC 14443-2, 2010; Part 3: Initialization and anticollision, ISO/IEC 14443-3, 2011; Part 4: Transmission protocol, ISO/IEC 14443-4, 2008]. With smaller modules currently being integrated in wrist-bands, watches and items of jewelry, a possible counter-measure to the reduced size is the use of flux-concentrating magnetic material - low-permeability insulating ferrites or high-permeability metallic μ-particle systems such as sendust. Sendust is a magnetically soft iron-rich alloy of Fe, Al and Si - a higher permeability cheaper alternative to permalloy. The integration of sendust components in RFID tags creates a non-trivial multiple-parameter optimization problem, which requires a quantitative RF field imaging system to be used. The RF susceptibility mapping system is comprised of a stepper-motor-driven 4-axial table, which holds the device under test (DUT) or the RFID tag assembly, a source coil (2 turns of 0.5 mm diameter wire, of overall diameter of 21 cm), a 4-micro-coil assembly, allowing for the measurement of Hx, Hy, Hz and dHz/dz, and a 4-channel Vector Network Analyzer (VNA). Four complex transmission spectra are obtained for each spatial point of a rectangular (x, y) grid, and then repeated for a different z-cut. 4D Complex Vector field maps are thus obtained. Simultaneous fitting of the real and imaginary parts of the frequency spectra is possible, at essentially any point of space, to a model comprised of two damped harmonic oscillators. This type of 3D-spatial, full-vector, complex magnetic susceptibility imaging opens ways to the integration of magnetic materials in near-field systems, and is not limited to RFID. | en |
dc.language.iso | en | en |
dc.relation.ispartofseries | AIP Advances | en |
dc.relation.ispartofseries | 9 | en |
dc.relation.ispartofseries | 3 | en |
dc.rights | Y | en |
dc.subject | RFID | en |
dc.subject | Magentic susceptibility | en |
dc.subject | Ferromagnetic materials | en |
dc.subject | Optimization problems | en |
dc.subject | Vector network analyzer | en |
dc.subject | Radiofrequency integrated circuits | en |
dc.subject | Vector fields | en |
dc.subject | Magnetic fields | en |
dc.subject | Radio frequency identification | en |
dc.title | 4D full-vector radio frequency complex magnetic susceptibility mapping. Near-field imaging of RFID tags | en |
dc.type | Journal Article | en |
dc.type.supercollection | scholarly_publications | en |
dc.type.supercollection | refereed_publications | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/stamenp | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/acklank | en |
dc.identifier.rssinternalid | 204288 | en |
dc.identifier.doi | http://dx.doi.org/10.1063/1.5080151 | en |
dc.rights.ecaccessrights | openAccess | |
dc.identifier.orcid_id | 0000-0002-8132-3033 | en |
dc.identifier.uri | https://aip.scitation.org/doi/10.1063/1.5080151 | |
dc.identifier.uri | http://hdl.handle.net/2262/89902 | |