Design of a fully textile dualband patch antenna using denim fabric

Yang, Hung-Chi; Azeez, Hemin Ismael; Wu, Chih-Kuang; Chen, Wen-Shan

doi:10.1109/compem.2017.7912820

Cited by 8 publications

(7 citation statements)

References 5 publications

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“…The planar antenna made of copper strip has a better performance than fabric antennas in terms of usable frequency. Meanwhile, the fabric antenna is flexible, can be easily integrated into clothing and is wearable (Yang et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

Wire antennas for textiles applications

Wiri¹

2021

J. Electrical Electron. Eng. Res.

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This paper investigates the use of a Genetic Algorithm to produce an optimized compact monopole antenna for textile application. The antenna characteristics are examined using the Numerical Electromagnetic code (NEC2) with genetic algorithm (GA). The design objective for the antennas considered here is to drive the S 11 to be less than or at least, as close as possible to -10dB, targeting this application (850-950 MHz) band. Results of return loss are also presented. The purpose of this study is to build a genetic algorithm (GA) optimisation of wire antennas for application at 900MHz. These antennas are fully textile, flexible and wearable. Measurement test was performed by placing the textile antenna sample close to the human chest while results were compared with simulation on a body phantom. Specific absorption rate was evaluated in CST Microwave Studio. To validate our results, four linear wire antenna designs, planar and embroidered antennas were fabricated, measured and compared with the simulation. Simulated and measured results show that all the antennas can operate at 900 MHz band.

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Section: Resultsmentioning

confidence: 99%

Wire antennas for textiles applications

Wiri¹

2021

J. Electrical Electron. Eng. Res.

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“…Cuff button antennas and modular textile snap-on button antennas have also been reported in the literature [9][10][11]. For wearable textile antennas utilising substrates with a low dielectric constant, the surface wave losses are reduced and impedance bandwidth is expanded [12][13][14].…”

Section: Introductionmentioning

confidence: 98%

“…Nonstretchable denim fabric, which is strong, durable and normally made of a 100% cotton yarn, has been used as the substrate material for textile-based antennas [12,15]. Another type of dielectric substrate for wearable antennas is cellulose filter paper.…”

Section: Introductionmentioning

confidence: 99%

Wearable Triband E-Shaped Dipole Antenna with Low SAR for IoT Applications

2019

Self Cite

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This paper presents a novel design of a flexible and wearable E-shaped, multiband dipole antenna. The antenna has a low profile and is printed on a common 2 mm thick denim fabric ( ε r = 1.7 ). By installing a passively coupled rectangular patch with L-shaped cuts, the lower frequency band is supported and the bandwidth at higher frequencies is also enhanced. The antenna’s performance was observed under different deformations in free space as well as when it was placed on different parts of the human body. No significant changes in the characteristics of the frequency bands of interest were observed for the flexible antenna compared with the initial nondeformable antenna. Simulations for 10 g average specific absorption rate (SAR) at different input powers up to 250 mW were carried out considering that the antenna adheres well to the human body and there is no spacing or shielding. The obtained results show that the amount of energy absorbed by the body tissue increases by increasing the incident power.

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“…The need for more IoT devices has contributed to the development of new antenna topologies with unique shapes made on unconventional substrates. Unconventional substrates, such as polydimethylsiloxane polymer [22,23], natural rubber [24], and textiles [12,20,[25][26][27][28][29][30][31][32], were used to create flexible antennas. Furthermore, for an unobtrusive integration into garments and accessories, several antenna geometries, such as those with buttons [33] or that are optically transparent [34], have a zip-based monopole [35], or are logo-based [36][37][38][39][40][41][42][43][44][45][46][47][48][49], have been reported.…”

Section: Introductionmentioning

confidence: 99%

Fully Textile Dual-Band Logo Antenna for IoT Wearable Devices

Atanasova

Atanasov

2022

Sensors

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In recent years, the interest in the Internet of Things (IoT) has been growing because this technology bridges the gap between the physical and virtual world, by connecting different objects and people through communication networks, in order to improve the quality of life. New IoT wearable devices require new types of antennas with unique shapes, made on unconventional substrates, which can be unobtrusively integrated into clothes and accessories. In this paper, we propose a fully textile dual-band logo antenna integrated with a reflector for application in IoT wearable devices. The proposed antenna’s radiating elements have been shaped to mimic the logo of South-West University “Neofit Rilski” for an unobtrusive integration in accessories. A reflector has been mounted on the opposite side of the textile substrate to reduce the radiation from the wearable antenna and improve its robustness against the loading effect from nearby objects. Two antenna prototypes were fabricated and tested in free space as well as on three different objects (human body, notebook, and laptop). Moreover, in the two frequency ranges of interest a radiation efficiency of 25–38% and 62–90% was achieved. Moreover, due to the reflector, the maximum local specific-absorption rate, which averaged over 10 g mass in the human-body phantom, was found to be equal to 0.5182 W/kg at 2.4 GHz and 0.16379 W/kg at 5.47 GHz. Additionally, the results from the performed measurement-campaign collecting received the signal-strength indicator and packet loss for an off-body scenario in real-world use, demonstrating that the backpack-integrated antenna prototype can form high-quality off-body communication channels.

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Design of a fully textile dualband patch antenna using denim fabric

Cited by 8 publications

References 5 publications

Wire antennas for textiles applications

Wire antennas for textiles applications

Wearable Triband E-Shaped Dipole Antenna with Low SAR for IoT Applications

Fully Textile Dual-Band Logo Antenna for IoT Wearable Devices

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