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Article

Embroidered Βow-Tie Wearable Antenna for the 868 and 915 MHz ISM Bands

1
Department of Electronic Engineering, Hellenic Mediterranean University, 73133 Chania, Crete, Greece
2
Department of Materials and Technology (KET), University of West Bohemia, 30100 Pilsen, Czech Republic
3
Department of Information and Electronic Engineering, International Hellenic University, 57400 Thessaloniki, Greece
4
School of Electrical and Computer Engineering, National Technical University of Athens, 15780 Athens, Greece
*
Author to whom correspondence should be addressed.
Academic Editor: Giovanni Andrea Casula
Electronics 2021, 10(16), 1983; https://doi.org/10.3390/electronics10161983
Received: 10 July 2021 / Revised: 12 August 2021 / Accepted: 14 August 2021 / Published: 17 August 2021
(This article belongs to the Section Microwave and Wireless Communications)
A textile, embroidered antenna, based on the fractal shape of the Sierpinski triangle, is designed in this paper for operation in the European free Industrial Scientific and Medical (ISM) 863–870 MHz band, as well as in the 902–928 MHz band designated for ISM applications in North and South America. Several prototypes have been fabricated by employing different stitch patterns and thread materials. The effect of the fabrication parameters on the performance of the proposed antenna is investigated through measurements and simulations, with the results being in good agreement. The antenna exhibits attractive characteristics such as wide bandwidth, relatively stable radiation patterns, as well as robustness in washing. Several tests reveal that convex and concave bent conditions do not affect the coverage of the aforementioned ISM bands, despite the shift of the resonant frequency in some cases. Moreover, the SAR values resulting from simulations are below the corresponding thresholds suggested by international guidelines. View Full-Text
Keywords: bow-tie antenna; curved antenna; embroidered antenna; Internet of Things; textile antenna; wearable antenna bow-tie antenna; curved antenna; embroidered antenna; Internet of Things; textile antenna; wearable antenna
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MDPI and ACS Style

Kapetanakis, T.N.; Pavec, M.; Ioannidou, M.P.; Nikolopoulos, C.D.; Baklezos, A.T.; Soukup, R.; Vardiambasis, I.O. Embroidered Βow-Tie Wearable Antenna for the 868 and 915 MHz ISM Bands. Electronics 2021, 10, 1983. https://doi.org/10.3390/electronics10161983

AMA Style

Kapetanakis TN, Pavec M, Ioannidou MP, Nikolopoulos CD, Baklezos AT, Soukup R, Vardiambasis IO. Embroidered Βow-Tie Wearable Antenna for the 868 and 915 MHz ISM Bands. Electronics. 2021; 10(16):1983. https://doi.org/10.3390/electronics10161983

Chicago/Turabian Style

Kapetanakis, Theodoros N., Martin Pavec, Melina P. Ioannidou, Christos D. Nikolopoulos, Anargyros T. Baklezos, Radek Soukup, and Ioannis O. Vardiambasis. 2021. "Embroidered Βow-Tie Wearable Antenna for the 868 and 915 MHz ISM Bands" Electronics 10, no. 16: 1983. https://doi.org/10.3390/electronics10161983

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