Wearable Antennas: Nontextile Versus Fully Textile Solutions

Corchia, Laura; Monti, Giuseppina; Tarricone, Luciano

doi:10.1109/map.2019.2895665

Cited by 81 publications

(40 citation statements)

References 90 publications

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“…The major challenge of designing wearable antennas is to make an antenna that is invisible and unobtrusively integrated inside a garment as well as comfortable and non-hindering for the wearer [7,25]. The integration of antennas into clothes involves using textile materials as dielectric substrates [7].…”

Section: The Effect Of Electromagnetic Properties Of the Substrate Mamentioning

confidence: 99%

Wearable Textile Antennas with High Body-Antenna Isolation: Design, Fabrication, and Characterization Aspects

Atanasov¹,

Atanasova²,

Atanasov³

2020

Modern Printed-Circuit Antennas

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This chapter provides a brief overview of the types of wearable antennas with high body-antenna isolation. The main parameters and characteristics of wearable antennas and their design requirements are discussed. Next, procedures (passive and active) to test the performance of wearable antennas are presented. The electromagnetic properties of the commercially available textiles used as antenna substrates are investigated and summarized here, followed by a more detailed examination of their effects on the performance of wearable antennas with high body-antenna isolation. A trade-off between substrate electromagnetic properties and resonant frequency, bandwidth, radiation efficiency, and maximum gain is presented. Finally, a case study is presented with detailed analyses and investigations of the low-profile all-textile wearable antennas with high body-antenna isolation and low SAR. Their interaction with a semisolid homogeneous human body phantom is discussed. The simulations and experimental results from different (in free-space and on-body) scenarios are presented.

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Section: The Effect Of Electromagnetic Properties Of the Substrate Mamentioning

confidence: 99%

Wearable Textile Antennas with High Body-Antenna Isolation: Design, Fabrication, and Characterization Aspects

Atanasov¹,

Atanasova²,

Atanasov³

2020

Modern Printed-Circuit Antennas

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“…Even the European Commission has recently stated that future wearables will have to be "shapeable, stretchable and washable/cleanable on-demand", emphasizing that a wearable should look like natural clothing in terms of comfortability, breathability and washability [13]. One of the strategies to overcome these limitations is to use textile materials for fabricating the devices [14,15] and to resort to chipless devices [16]. This would lead to a potentially infinite service-life of the devices, and it would also lower energy consumption.…”

Section: Introductionmentioning

confidence: 99%

“…While in [25], a chipless tag consisting of multiple L-shaped scatterers was investigated. This chipless tag could depolarize the incident wave and create a response in the orthogonal polarization; however, the experimental results reported in [25] refer to prototypes fabricated on a rigid substrate commonly used for PCB, and the extension of these results to fully-textile materials is not straightforward [15,26].…”

Section: Introductionmentioning

confidence: 99%

Fully-Textile, Wearable Chipless Tags for Identification and Tracking Applications

Corchia

Monti

Benedetto

et al. 2020

Sensors

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In this work, two fully-textile wearable devices, to be used as chipless identification tags in identification and tracking applications are presented. For the fabrication of the fully-textile tags, a layer of fleece was used as a substrate, while an adhesive non-woven conductive fabric was employed for the conductive parts. To allow radio-frequency identification of these chipless tags, two alternative techniques were used. One relies on associating a binary code with the resonance frequency of resonant devices: the presence/absence of the resonance peaks in the transmission scattering parameter, | S 21 | , of a set of resonators is used to encode a string of bits. The second technique for accomplishing radio-frequency identification of the chipless tags resorts to a frequency-shift coding technique, which is implemented by modifying the configuration of a hairpin resonator. The obtained numerical and experimental results confirm the suitability of the proposed strategies for obtaining entirely-textile, wearable chipless tags for identification and tracking purposes, which can be particularly useful, especially in the industrial sector. In this field, in fact, the proposed solutions would guarantee a seamless integration with clothes and would facilitate the user’s interaction with the IoT infrastructure. In this regard, one of the envisaged application scenarios related to the tracking of hides in the leather industry is also presented.

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“…Smart e-textiles are a promising platform for body area wireless sensor networks. Antenna design on textiles has been an increasingly popular research area with fully-textile, hybrid and fullyrigid antennas designed for integration in garments [1]. Flexible and textile antennas have been previously presented for body area networks [2,3], for energy harvesting at 2.4 GHz [4], and at 5G millimetre-wave (mmWave) bands [5].…”

Section: Introductionmentioning

confidence: 99%

“…Flexible and textile antennas have been previously presented for body area networks [2,3], for energy harvesting at 2.4 GHz [4], and at 5G millimetre-wave (mmWave) bands [5]. Furthermore, substrate integrated waveguides (SIW) have been fabricated on textiles by using different conductive materials for improved isolation [1].…”

Section: Introductionmentioning

confidence: 99%

Overcoming the Efficiency Barrier of Textile Antennas: A Transmission Lines Approach

Wagih

Weddell

Beeby

2019

International Conference on the Challenges, Opportunities, Innovations and Applications in Electronic Textiles

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Designing high-efficiency antennas on textiles is fundamental for the development of wirelessly-connected smart garments. Furthermore, large antenna arrays could be used to receive or harvest directional and ambient radio-frequency (RF) power from the environment, thus enabling battery-free e-textiles. The key challenges that are hindering the realisation of high efficiency antennas lie in the dielectric properties of fabrics, the conductivity of their traces, and their low textile thickness. This work numerically and experimentally analyses different RF transmission line structures to establish the limitations of widely utilised antenna designs, such as the microstrip patch, and proposes alternative wearable antenna design based on coplanar waveguide (CPW) structures. It is demonstrated that by using a CPW, insertion losses in a 20 mm line can be minimized by up to 40% for the same substrate, as compared to a microstrip, at 30 GHz. A CPW monopole antenna is demonstrated with more than 80% efficiency on a lossy, thin, poly-cotton substrate. Moreover, it is shown that the efficiency of the CPW monopole is independent of the substrate’s thickness and type of fabric.

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Wearable Antennas: Nontextile Versus Fully Textile Solutions

Cited by 81 publications

References 90 publications

Wearable Textile Antennas with High Body-Antenna Isolation: Design, Fabrication, and Characterization Aspects

Wearable Textile Antennas with High Body-Antenna Isolation: Design, Fabrication, and Characterization Aspects

Fully-Textile, Wearable Chipless Tags for Identification and Tracking Applications

Overcoming the Efficiency Barrier of Textile Antennas: A Transmission Lines Approach

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