Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, EpiSciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

Effect of added resonators in RFID system at 13.56 MHz

Abstract : In this study, a reader antenna including resonators is proposed to improve detection of a small moving tag in the case of tracking a radiofrequency identification (RFID) system. The near-field RFID technology is based on load modulation, the input impedance on the reader coil and the mutual inductance between the reader and tag coils are the main parameters for performing detection. They are calculated from the impedance matrix parameters. The added resonators change all the parameters of the impedance matrix consequently the input impedance and mutual inductance are also changed. In this study, analytical formulation defining the equivalent impedance matrix parameters is developed. These formulae are used to evaluate the performance of the proposed design according to the tag misalignment (lateral and angular). From the calculation and simulation results, a frequency shift in the equivalent input impedance is found. To avoid this problem, optimising the positioning of the resonators on the reader coil is performed. This study is confirmed by measures of RFID detection for a reader prototype (with and without resonators) and a small commercial tag. Both the surface and volume of detection of the small moving tag (lateral and angular misalignment) are improved by the principle of added resonators.
Complete list of metadata

Cited literature [20 references]  Display  Hide  Download
Contributor : Gaelle Lissorgues Connect in order to contact the contributor
Submitted on : Friday, June 21, 2019 - 2:40:27 PM
Last modification on : Friday, March 4, 2022 - 12:18:02 PM


Files produced by the author(s)



Megdouda Benamara, Marjorie Grzeskowiak, Antoine Diet, Christophe Conessa, Gaelle Bazin Lissorgues, et al.. Effect of added resonators in RFID system at 13.56 MHz. IET Microwaves Antennas and Propagation, Institution of Engineering and Technology, 2018, 12 (5), pp.684-691. ⟨10.1049/iet-map.2017.0500⟩. ⟨hal-01763659⟩



Record views


Files downloads