Coaxially distributed diameter sub-coil twisted loop antenna in HF RFID

Grzeskowiak, Marjorie; Diet, Antoine; Benamara, Megdouda; Protat, Stéphane; Conessa, Christophe; Biancheri-Astier, Marc; Alvès, Francisco; Bihan, Yann Le; Lissorgues, Gaëlle

doi:10.23919/eucap.2017.7928426

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…The performance of the on-center (230 and 137) in comparison with the 300 conventional coil has been done with HFSS simulation and was validated by HF RFID detection [11]. We measured the greatest RFID read-out distance at one point for two tag diameters: As seen on B-field displays in [11], the effective area of the on-center structure improves the tag detection for a tag with similar diameter.…”

Section: Simulated Power Efficiencymentioning

confidence: 99%

Distributed Diameter Subcoil Twisted Loop Antenna in Nonradiative WPT

Grzeskowiak¹,

Diet

Benamara³

et al. 2018

Antennas Wirel. Propag. Lett.

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This letter focuses on the high-frequency wireless power transfer by electromagnetic induction and its dependence on the lateral misalignment and tilt of the small receiving coil relative to the transmitting coil. We combine two structures, the twisted loop antenna (TLA) and subcoils of a distributed diameter coil (DDC) for transmitting designs. Our system is then referred to as TLA-DDC. The radius of the subcoils is parametrically varied for different distances between the coils and performed in two positions for each distance (coaxial position when the receiving coil is parallel to the plane of the transmitting coil, and center position for the perpendicular orientation of both coils). Then, using different radii for the transmitting DDC TLA when the receiving coil is moved onto its surface allows us to obtain a greater value of efficiency at different positions: up to 2.4 times for the peak value and 1.5 for the average value for receiving coil in parallel plane. The efficiency of the magnetic coupling is determined by means of power efficiency with a comparison between the DDC TLA antennas and a standard coil antenna corresponding to the same inductance value.

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Section: Simulated Power Efficiencymentioning

confidence: 99%

Distributed Diameter Subcoil Twisted Loop Antenna in Nonradiative WPT

Grzeskowiak¹,

Diet

Benamara³

et al. 2018

Antennas Wirel. Propag. Lett.

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“…Complementary coils [3] increase magnetic coupling in the intersection of the coils when the transponder is perpendicular to the reader surface (VM mode in Fig.1.b) and Distributed Diameter Coil [4] allows especially the detection in HM mode, i.e. when the transponder is placed parallel (Fig.1.a).…”

Section: A Contextementioning

confidence: 99%

“…The sub-coils increase the magnetic coupling when the tag surface and this of the reader surface are parallel (HM mode) and perpendicular. Preliminary studies on coaxially sub-coil in complementary coils were done in [4]: RFID read-out distance at one point verify the improvement of the sub-coil structure for both orientations of the tag, but the magnetic coupling is weaker in the case of VM mode. In order to optimize the detection volume whatever tag's orientation, weaker magnetic coupling in VM mode has to been improved.…”

Section: Introductionmentioning

confidence: 96%