Title:	Embroidered bow-tie wearable antenna for the 868 and 915 MHz ISM bands
Authors:	Kapetanakis, Theodoros N. Pavec, Martin Ioannidou, Melina P. Nikolopoulos, Christos D. Baklezos, Anargyros T. Soukup, Radek Vardiambasis, Ioannis O.
Citation:	KAPETANAKIS, TN. PAVEC, M. IOANNIDOU, MP. NIKOLOPOULOS, CHD. BAKLEZOS, AT. SOUKUP, R. VARDIAMBASIS, IO. Embroidered bow-tie wearable antenna for the 868 and 915 MHz ISM bands. Electronics, 2021, roč. 10, č. 16, s. 1-14. ISSN: 2079-9292
Issue Date:	2021
Publisher:	MDPI
Document type:	článek article
URI:	2-s2.0-85112513255 http://hdl.handle.net/11025/45522
ISSN:	2079-9292
Keywords in different language:	bow-tie antenna;curved antenna;embroidered antenna;Internet of Things;textile antenna;wearable antenna
Abstract in different language:	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 stableradiation 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.
Rights:	© Creative Commons Attribution License
Appears in Collections:	Články / Articles (RICE) OBD

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