Miniaturized high gain flexible spiral antenna tested in human-like tissue
Authors
Fernández Muñoz, Miguel; Sánchez Montero, Rocío; López Espí, Pablo Luis; Martínez Rojas, Juan Antonio; Díez Jiménez, EfrénIdentifiers
Permanent link (URI): http://hdl.handle.net/10017/59646DOI: 10.1109/TNANO.2022.3225912
ISSN: 1536-125X
Publisher
IEEE
Date
2022-12-01Bibliographic citation
Fernández Muñoz, M., Sánchez Montero, R., López Espí, P.L., Martínez Rojas, J.A. & Díez Jiménez, E. 2022, "Miniaturized high gain flexible spiral antenna tested in human-like tissues", IEEE Transactions on Nanotechnology, vol. 21, pp. 772-777.
Keywords
Helical antenna
High gain antenna
Implantable medical device (IMD)
Miniaturized flexible thin antenna
Spiral antenna
Wireless power transfer (WPT)
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/acceptedVersion
Publisher's version
https://doi.org/10.1109/TNANO.2022.3225912Rights
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
© 2022 IEEE
Access rights
info:eu-repo/semantics/openAccess
Abstract
A miniaturized helical antenna is presented in this work. The antenna is flexible, it is 6100 μm long and it has a diameter of 352 μm. This antenna has such a small cross-section, that permits to be implanted in the human body with fine syringes and minimally invasive surgeries. The antenna can be used to receive power and/or send information in medical devices. The antenna is made of biocompatible materials: polytetrafluoroethylene (PFTE) and copper. The fundamental parameters of the antenna have been simulated and experimentally measured in animal human-like tissues, showing good agreement. The resonant frequency of the antenna is 4.7 GHz, with a reflection coefficient of −25.1 dB, and a gain of −4.7 dBi. As expected, the resonant frequency decreases inside biological tissues comparing to the free-space open-air measurement. Reducing the resonant frequency is an advantage because power signals can penetrate deeper into body tissues.
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