Emissive Properties of Wearable Wireless-Communicating Textiles Made From Multimaterial Fibers

Gorgutsa, Stepan; Khalil, Mazen; Bélanger-Garnier, Victor; Viens, Jeff; Gosselin, Benoît; LaRochelle, Sophie; Messaddeq, Younès

doi:10.1109/tap.2016.2546959

Cited by 11 publications

(18 citation statements)

References 17 publications

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“…The radiation patterns of the textile antennas were measured in an anechoic chamber using the Aaronia HyperLOG-7060 antenna and a tunable signal generator on the transmission side, while the textile samples were kept fixed on a dielectric holder and acted as far-field receivers [57]. Linear dipole (Figure 5b), and loop ( Figure 5c) textile antennas exhibit patterns in E and H radiation planes in agreement with numerical simulations.…”

Section: Radiation Patternsupporting

confidence: 65%

“…Two different methods to integrate the antennas into textile have been used. The first one was a computerized loom (Little Weaver from AVL Looms Inc., Chico, CA, USA), with 40 cm weaving width [57]. The fiber antennas themselves represented only a few substitution threads in the fabric and their flexibility made them unobtrusive enough to be essentially indistinguishable from the textile host.…”

Section: Textile Integrationmentioning

confidence: 99%

“…An example of a loop antenna integrated into textile is shown in Figure 4f (top). The fibers withstood weaving process, textile manipulation, and heat/humidity (i.e., +60 • C temperature and 80% relative humidity for 96 h) tests without any damage or performance losses [53,54,57]. The second method was to manually sew the antenna onto the textile and fix the ends using cyanoacrylate glue, as shown in Figure 4f (bottom).…”

Section: Textile Integrationmentioning

confidence: 99%

“…It is defined as the power radiated relative to the power delivered to the antenna. Textile antenna gain measurements were conducted using the technique based on well-known Friis equation approach [59] and described in details in the previous work [57]. The gain value is determined using the following equation:…”

Section: Gainmentioning

confidence: 99%

“…When textile fiber antenna is mounted on a body, its geometry is subject to significant deformations caused by the body shape. The antenna deformation causes changes to the RF emissive properties of the smart textile [54,57,64]. Therefore, the effect of mechanical deformations needs to be quantified for the multimaterial fiber antennas.…”

Section: Influence Of Conductive Medium: Frequency Shifts and Mechanimentioning

confidence: 99%

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New Generation Wearable Antenna Based on Multimaterial Fiber for Wireless Communication and Real-Time Breath Detection

et al. 2018

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Smart textiles and wearable antennas along with broadband mobile technologies have empowered the wearable sensors for significant impact on the future of digital health care. Despite the recent development in this field, challenges related to lack of accuracy, reliability, user’s comfort, rigid form and challenges in data analysis and interpretation have limited their wide-scale application. Therefore, the necessity of developing a new reliable and user friendly approach to face these problems is more than urgent. In this paper, a new generation of wearable antenna is presented, and its potential use as a contactless and non-invasive sensor for human breath detection is demonstrated. The antenna is made from multimaterial fiber designed for short-range wireless network applications at 2.4 GHz frequency. The used composite metal-glass-polymer fibers permits their integration into a textile without compromising comfort or restricting movement of the user due to their high flexibility, and shield efficiently the antenna from the environmental perturbation. The multimaterial fiber approach provided a good radio-frequency emissive properties, while preserving the mechanical and cosmetic properties of the garments. With a smart textile featuring a spiral shape fiber antenna placed on a human chest, a significant shift of the operating frequency of the antenna was observed during the breathing process. The frequency shift is caused by the deformation of the antenna geometry due to the chest expansion, and to the modification of the dielectric properties of the chest during the breath. We demonstrate experimentally that the standard wireless networks, which measure the received signal strength indicator (RSSI) via standard Bluetooth protocol, can be used to reliably detect human breathing and estimate the breathing rate in real time. The mobile platform takes the form of a wearable stretching T-shirt featuring a sensor and a detection base station. The sensor is formed by a spiral-shaped antenna connected to a compact Bluetooth transmitter. Breathing patterns were recorded in the case of female and male volunteers. Although the chest anatomy of females and males is different compared, the sensor’s flexibility allowed recording successfully a breathing rate of 0.3 Hz for the female and 0.5 Hz for the male, which corresponds to a breathing rate of 21 breaths per minutes (bpm) and 30 bpm, respectively.

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Section: Radiation Patternsupporting

confidence: 65%

Section: Textile Integrationmentioning

confidence: 99%

Section: Textile Integrationmentioning

confidence: 99%

Section: Gainmentioning

confidence: 99%

Section: Influence Of Conductive Medium: Frequency Shifts and Mechanimentioning

confidence: 99%

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New Generation Wearable Antenna Based on Multimaterial Fiber for Wireless Communication and Real-Time Breath Detection

et al. 2018

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Washable hydrophobic smart textiles and multi-material fibers for wireless communication

Gorgutsa

Bachus

LaRochelle

et al. 2016

Smart Mater. Struct.

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This paper reports on the performance and environmental endurance of the recently presented wirelessly communicating smart textiles with integrated multi-material fiber antennas. Metal–glass–polymer fiber composites were fabricated using sub-1 mm hollow-core silica fibers and liquid state silver deposition technique. These fibers were then integrated into textiles in the form of center-fed dipole and loop antennas during standard weaving procedure. Fiber antennas performance was found to be directly comparable to classic ‘rigid’ solutions in terms of return loss, gain and radiation patterns, which allowed transmitting data through Bluetooth protocol at 2.4 GHz frequency. Applied superhydrophobic coatings (water contact angle = 152°, sliding angle = 6°) allow uninterrupted wireless communication of the textiles under direct water application even after multiple washing cycles.

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Design of Wearable Textile Based Microstrip Patch antenna by using defected ground plane

Jaiswal

Sinha

2018

2018 International Conference on Advanced Computation and Telecommunication (ICACAT)

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Emissive Properties of Wearable Wireless-Communicating Textiles Made From Multimaterial Fibers

Cited by 11 publications

References 17 publications

New Generation Wearable Antenna Based on Multimaterial Fiber for Wireless Communication and Real-Time Breath Detection

New Generation Wearable Antenna Based on Multimaterial Fiber for Wireless Communication and Real-Time Breath Detection

Washable hydrophobic smart textiles and multi-material fibers for wireless communication

Design of Wearable Textile Based Microstrip Patch antenna by using defected ground plane

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