Passive E-textile UHF RFID Tag for Wireless Body Centric Communications

Lagha, Faten; Beldi, Sabri; Latrach, Lassaad

doi:10.1109/icm.2018.8704005

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…Instead of using conductive fibers, other conductive flat materials can be employed in tag structures [ 45 , 46 , 47 , 48 ]. Such tags can be attached to the textile product using glue and ironing.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Factors Affecting the Performance of Textronic UHF RFID Transponders

Ziobro,

Jankowski-Mihułowicz,

Węglarski

et al. 2023

Sensors

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The aim of this paper is to demonstrate progress in textronic UHF RFID transponder (RFIDtex tag) technology. The fundamental idea behind the RFIDtex tag design involves galvanic separation between circuits of the sewn antenna and the chip, which are electromagnetically coupled through a system of inductive loops. To advance the development of this concept, it is crucial to detect factors affecting the performance of the transponders. To achieve this goal, a mathematical model of the textronic UHF RFID transponder was developed. It involves relationships that describe the impedance of each element, the mutual inductance of the loops, and the chip voltage, and it enables the exploration of the influence of these variables on general parameters such as impedance matching and read range. Various analytical and numerical approaches were considered to obtain the value of the mutual inductance of the loops. The dimensions and geometry of the antenna, as well as the matching circuit in the microelectronic module, were taken into account. Based on the mathematical model, it was determined that mutual inductance strongly affects the chip voltage for frequencies higher than 800 MHz. The calculations from the mathematical model were compared with numerical simulations. Experimental studies were also conducted to investigate how the transponder performance is affected by either the distance between the centers of the loops or the conductivity of the threads used to embroider the antenna. The measurement results allowed us to conclude that even small imperfections in the manufacturing of the transponder, which slightly increase the vertical or horizontal distance between the centers of the loops, cause a dramatic decrease in the mutual inductance and coupling coefficient, significantly impacting the transponder’s performance.

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Section: Introductionmentioning

confidence: 99%

Investigation of Factors Affecting the Performance of Textronic UHF RFID Transponders

Ziobro,

Jankowski-Mihułowicz,

Węglarski

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

The Influence of the Design of Antenna and Chip Coupling Circuits on the Performance of Textronic RFID UHF Transponders

Ziobro,

Jankowski-Mihułowicz,

Węglarski

et al. 2024

Electronics

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The objectives of this study were to design, investigate, and compare different designs of coupling circuits for textronic RFID transponders, particularly focusing on magnetic coupling between an antenna and a chip. The configuration of the inductively coupled antenna module and the microelectronic module housing the chip can be varied in several ways. This article explores various geometries of coupling circuits and assesses the effects of altering their dimensions on mutual inductance, chip voltage, and the transponder’s read range. The investigation comprised an analytical description of inductive coupling, calculations of mutual inductance and chip voltage based on simulation models of transponders, and laboratory measurements of the read range for selected configurations. The results obtained from this study demonstrate that various designs of textile transponders are capable of achieving satisfactory read ranges, with some configurations extending beyond 10 m. This significant range provides clothing designers with the flexibility to select transponder designs that best meet their specific aesthetic and functional requirements.

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Passive E-textile UHF RFID Tag for Wireless Body Centric Communications

Cited by 2 publications

References 8 publications

Investigation of Factors Affecting the Performance of Textronic UHF RFID Transponders

Investigation of Factors Affecting the Performance of Textronic UHF RFID Transponders

The Influence of the Design of Antenna and Chip Coupling Circuits on the Performance of Textronic RFID UHF Transponders

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