Pebbles Tracking Thanks to Rfid Lf Multi-Loops Inductively Coupled Reader

Grzeskowiak, Marjorie; Diet, Antoine; Diao, Pape Sanoussy; Protat, Stéphane; Bourcier, Christophe; Bihan, Yann Le; Lissorgues, Gaëlle

doi:10.2528/pierc14102403

Cited by 12 publications

(17 citation statements)

References 13 publications

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“…However, the radiofrequency link based on magnetic mutual coupling between reader and tag antenna, often loops antenna, is still a complex challenge to improve the system. Detection range and areas are considered an assessment factor for RFID system performances [1] [2]. The detection of the tag is performed when its effective surface has generated enough power to supply the RFID tag chip, by integrating the magnetic field generated by the reader loop current.…”

Section: Contextmentioning

confidence: 99%

A Twisted Loop Antenna to enhance HF RFID detection for different tag positioning

Benamara

Grzeskowiak

Diet

et al. 2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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In this paper, a new LF/HF RFID reader loop antenna design is proposed and tested, in order to increase detection areas of the tags. The studied structure is a Twisted Loop Antenna (TLA) which is based on a modified distribution and orientation of the magnetic field lines. Our structure fruitfully uses the complementary antenna principle in a coplanar configuration. This offers more possibilities of tag detection whatever the tag position and orientation. The antenna performances are evaluated by optimizing the equivalent mutual inductance between reader antenna and tag antenna. Results are presented firstly in simulation (MATLAB and HFSS electromagnetic calculator) and secondly by experimental tests at different distances and misalignments, for the two possible tag orientations: parallel and perpendicular.

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Section: Contextmentioning

confidence: 99%

A Twisted Loop Antenna to enhance HF RFID detection for different tag positioning

Benamara

Grzeskowiak

Diet

et al. 2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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“…If possible, multiple detections ability is preferred. Consequently, we investigated the principle of detection in volume, for the tagged mMDs, driving us to consider a case study of magnetic coupling where the sizes of the tag and reader loops are very different [5][6] [7]. Such problematic is presented in Figure 1 with additional consideration about tag orientations.…”

Section: Rfid Application Contextmentioning

confidence: 99%

Detection tube for small HF RFID tags, based on mutual coupling with a coil resonator

Diet¹,

Conessa²,

Bihan³

et al. 2015

2015 European Microwave Conference (EuMC)

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This communication concerns the detection of 13.56 MHz (HF) RFID "small" tags. Herein, the term "small" refer to an effective area below 1 cm² and the detection principle is in volume, especially inside a tube of 9 cm in diameter and 2m in length. The ability to detect the "small" tags in the tube is achieved by using a coil resonator conformed on the tube surface, following a principle of multiple magnetic coupling, also referred as magnetic field guide. Theoretical considerations on mutual coupling formula and electrical model fit to CST simulations and VNA measurements concerning the evaluation of impedance and coupling factors range. Detection tests with an RFID reader (from IB technology) and NXP SLI-X chip confirm the possibility of detection by providing a first result of 2 cm range. This detection was impossible inside the tube without using the resonator. Perspectives of improvement evocated at the end of the paper are numerous for that structure.

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“…In this case, optimizing the tag detection is currently done by changing the shape of the conventional (circular or rectangular) reader coil. In the context of small misaligned tag, several studies are proposed to improve RFID detection [6][7][8][9][10][11][12]. In [12] reader antenna including resonator is proposed.…”

Section: Introductionmentioning

confidence: 99%

Array sub-loops reader antenna for HF RFID tracking

Benamara¹,

Grzeskowiak²,

Salhi³

et al. 2017

2017 IEEE International Conference on RFID Technology &Amp; Application (RFID-TA)

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this paper focuses on tracking and objects identification by means of High Frequency magnetic coupling RFID (Radio Frequency IDentification) at 13, 56 MHz. The coil of the used RFID tags corresponds to 1.9% of the reader coil surface (120x160 cm²). To increase the size ratio between the two coils, we proposed the use of multiple twisted loops antenna. The reader antenna is consequently divided into four sub-loops, corresponding to 8% of the surface of each one of the sub-loops area. According to the principle of twisted loop antenna, the nearest sub-loops are feed by current in opposite phase (complementary loops principle), and. This structure creates a strength curvature of magnetic field lines between each two of them, improving the magnetic coupling for vertical magnetic dipoles. In contrast, the structure presents at its center a null of magnetic field intensity due to the symmetry. To avoid this inconvenient a resonator is added to the structure to broke the symmetry and modify the magnetic field distribution. Its positioning is studied to optimize RFID detection in different angular and lateral positioning of the tag. Simulations and measurements of the proposed design with and without resonator are presented in the different parts of this paper.

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Pebbles Tracking Thanks to Rfid Lf Multi-Loops Inductively Coupled Reader

Cited by 12 publications

References 13 publications

A Twisted Loop Antenna to enhance HF RFID detection for different tag positioning

A Twisted Loop Antenna to enhance HF RFID detection for different tag positioning

Detection tube for small HF RFID tags, based on mutual coupling with a coil resonator

Array sub-loops reader antenna for HF RFID tracking

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