From Threads to Smart Textile: Parametric Characterization and Electromagnetic Analysis of Woven Structures

Alonso-González, Leticia; Hoeye, S. Ver; Fernández, M.; Vázquez, C.; Las-Heras, Fernando

doi:10.1109/access.2018.2886041

Cited by 6 publications

(4 citation statements)

References 41 publications

(58 reference statements)

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“…[ 3 ]. The accuracy of designs prepared for the textronic devices with the RFID interface depends in particular on the knowledge of the dielectric properties of the substrates/textiles [ 4 , 5 ]. These parameters, although important, are not of key importance in the case of multichannel/broadband textile antennas dedicated to classic radio communication systems with an impedance of 50 Ω [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Textile Substrates on the Performance of Textronic RFID Transponders

et al. 2022

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Recent advances in the development of innovative textronic products are often related to the implementation of radio-frequency identification (RFID) technology. Such devices contain components of wireless telecommunications systems, in which radiofrequency circuits should be designed taking into account not only the frequency band or destined application, but also the dielectric properties of the materials. As is known from the theory of RFID systems, the dielectric permittivity and loss angle of the substrates significantly affect the performance of RFID transponders. Therefore, the knowledge on the variability of these parameters is highly important in the context of developing new solutions in textronic devices with the RFID interface. According to the plan of studies, at the beginning, the comprehensive characterization and determination of the dielectric parameters of various types of textile substrates were carried out. On this basis, the influence of fabrics on the performance of textronic RFID (RFIDtex) tags was characterized with numerical calculations. As the RFIDtex transponders proposed by the authors in the patent PL231291 have an outstanding design in which the antenna and the chip are located on physically separated substrates and are galvanically isolated, the special means had to be implemented when creating a numerical model. On the other hand, the great advantage of the developed construction was confirmed. Since the impedance at the chip’s terminals is primarily determined by the coupling system, the selected fabrics have relatively low impact on the efficiency of the RFIDtex transponder. Such an effect is impossible to achieve with classical designs of passive or semi-passive transponders. The correctness of the simulations was verified on the exemplary demonstrators, in threshold and rotation measurements performed at the laboratory stand.

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Section: Introductionmentioning

confidence: 99%

The Influence of Textile Substrates on the Performance of Textronic RFID Transponders

et al. 2022

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“…This results in a higher density of matt weave (140 × 140) than the plain weave (108 × 106). Some literatures pointed out the effects of weaving pattern on the performance of ink-jet printed [16], [17] and embroidered electronics [18], [19]. We also expected that the weaving pattern would affect the antenna performance because the amount of silver ink absorption might vary on account of it.…”

Section: A Weaving Processmentioning

confidence: 96%

Effects of Textile Weaving and Finishing Processes on Textile-Based Wearable Patch Antennas

et al. 2020

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In this paper, we analyze the effects of textile weaving and finishing processes on the performance of textile-based wearable antennas. Several textile-based patch antennas operating at 2.4 GHz were designed and fabricated for evaluation. All of them had the same geometry comprising a 1-mm-thick felt substrate in the middle, and silver ink screen-printed polyester fabric as the ground and patch at the bottom and on top. However, polyester fabric, the bare textile material for the conductive ground and patch was subjected to different weaving and finishing (tentering, scouring, and calendering) processes. It was observed that the antenna resonant frequency, bandwidth, radiation efficiency, and peak gain were varied by these processes, although the antenna geometry and screen-printing method were identical to each other. The best antenna exhibits a peak gain of 5.2 dBi and a radiation efficiency of 42.4%, while the worst shows corresponding values of 4.17 dBi and 34.8%. This implies that the weaving and finishing processes considerably impact textile-based wearable antenna performances. INDEX TERMS Conductive ink, conductive textile, patch antenna, screen printing, textile-based antenna, wearable antenna, weaving process. FIGURE 2. Simulation results of (a) S11 response, (b) 3D radiation pattern, and (c) Specific absorption rate.

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“…The ND-MEC method outlined in this study proves that it is possible to represent the complicated 3D behavior of physical fields with lumped parameters when the characteristics of these fields are carefully considered (e.g., the application of an elliptical function for magnetic paths). This approach resembles homogenization techniques, which are widely used in multidisciplinary research [76]- [78]. However, the NT-PEM method allows the analysis of not only particular components (e.g., novel materials and their behavior) of a device but also the device as a whole and its performance under real conditions.…”

Section: ) Applicability Of the Nt-pem In Multidisciplenary Researchmentioning

confidence: 99%

Novel Non-Linear Transient Path Energy Method for the Analytical Analysis of the Non-Periodic and Non-Linear Dynamics of Electrical Machines in the Time Domain

Gabdullin

2019

IEEE Access

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This paper proposes a novel analytical method for the analysis of the dynamics of electrical machines. The method is applied to the analysis of complex permanent magnet (PM)-type magnetic contactors (MCs), which exhibit strong magnetic non-linearities and a high portion of stray and leakage magnetic fluxes. The latter means that the analysis of PM-type MCs using traditional magnetic equivalent circuit (MEC) methods is impossible, thus requiring computationally expensive and time-consuming finite element analysis (FEA). To overcome the limitations of traditional MECs, the magnetic field distribution in PM-type MC is studied in great detail, and a novel non-linear dynamic MEC (ND-MEC) method is proposed. The accuracy of the ND-MEC method is comparable to that of FEA which is achieved by accounting for non-linear effects and dynamic changes in the magnetic flux distribution using a novel stray path elliptical function. Furthermore, the applicability of the ND-MEC is extended to the time domain by combining it with the time difference method (TDM). The complete method, referred to as the non-linear transient path energy method (NT-PEM), combines the ND-MEC, TDM, and a path energy method for the calculation of electromagnetic forces. The validity of the NT-PEM is verified by comparing it with 3D FEA and experimental results obtained from a PM-type MC prototype. The NT-PEM is a fast and inexpensive alternative to FEA, which is particularly advantageous when many designs must be analyzed and optimized while reducing analysis costs. The proposed method can also be applied to the analysis of emerging technologies dealing with multiphysics coupled problems, as in the case of smart materials.INDEX TERMS Magnetic contactor, magnetic equivalent circuit (MEC), nonlinear dynamics, permanent magnets, stray flux modeling.

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From Threads to Smart Textile: Parametric Characterization and Electromagnetic Analysis of Woven Structures

Cited by 6 publications

References 41 publications

The Influence of Textile Substrates on the Performance of Textronic RFID Transponders

The Influence of Textile Substrates on the Performance of Textronic RFID Transponders

Effects of Textile Weaving and Finishing Processes on Textile-Based Wearable Patch Antennas

Novel Non-Linear Transient Path Energy Method for the Analytical Analysis of the Non-Periodic and Non-Linear Dynamics of Electrical Machines in the Time Domain

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