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Application of Fundamental In-Body Radiation Limitations to Practical Design of Antennas for Implantable Bioelectronics

Abstract : Fundamental in-body limitations on achievable radiation efficiency could provide decision-making assistance to engineers working on antennas for implantable bioelectronics. In this study, proof-of-concept conformal microstrip antennas are proposed based on these theoretical foundations. In particular, maximizing the effective aperture and loading the antenna with materials having the permittivity higher than that of surrounding tissues is a promising solution for increasing the radiation efficiency. The operating frequencies are tuned to operate within the optimal range for deep-body implantation: 434, 868, and 1400 MHz. The achieved radiation efficiencies at these frequencies are 0.4%, 2.2%, and 1.2%, respectively, when simulated in a f 100 - mm spherical phantom with muscle-equivalent electromagnetic properties. The radiation performance at each frequency is compared to the fundamental limitations and closely approach them. Prototypes are characterized for the experimental validation. © 2020 IEEE.
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https://hal.archives-ouvertes.fr/hal-03248668
Contributor : Laurent Jonchère Connect in order to contact the contributor
Submitted on : Wednesday, October 20, 2021 - 2:54:14 PM
Last modification on : Wednesday, April 27, 2022 - 4:20:15 AM
Long-term archiving on: : Friday, January 21, 2022 - 8:03:18 PM

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Nikolayev et al. - 2020 - Appl...
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D. Nikolayev, W. Joseph, M. Zhadobov, L. Martens, R. Sauleau, et al.. Application of Fundamental In-Body Radiation Limitations to Practical Design of Antennas for Implantable Bioelectronics. 2020 IEEE MTT-S International Microwave Biomedical Conference, IMBioC 2020, Dec 2020, Toulouse, France. pp.9384901, ⟨10.1109/IMBIoC47321.2020.9384901⟩. ⟨hal-03248668⟩

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