Local Dosimetry Applied to Wireless Power Transfer Around 10 MHz Dependence on em Parameters and Tissues Morphology

Abstract : In this paper, we analyze in detail the local exposure induced inside the human body by a generic nonradiative resonant wireless power transfer (WPT) system operating at 10 MHz. The impact of electromagnetic (EM) properties of biological tissue, as well as of the body geometry and size on local distribution of the EM field inside the body, is investigated using the finite integration technique. To this end, three high-resolution anatomical virtual family human body models have been employed, i.e., adult male and female, as well as a child model. The correlation of the distribution and location of maximum of the electric field (E) inside the body with the tissues intrinsic impedance contrast shows the ability to interpret the EM field behavior locally inside the body; the increase (decrease) of the intrinsic impedance from a tissue to another leads to the increase (decrease) of the E-field intensity. The location of the maximum inside the body is shown to be a function of the magnetic field (H) polarization inside the body. For instance, it appears in deeper tissues at locations where the H-field polarization is perpendicular compared to parallel to the body. Higher exposure levels are observed in adults compared to children in terms of E 99 (up to 60%) and SAR 10g (up to 100%). In the case of J1 cm2 and SAR wb, the peak values are higher in the female model, followed by the child and male (maximum variation of 31% and 10%, respectively). © 2016 IEEE.
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Submitted on : Monday, May 6, 2019 - 3:06:54 PM
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M. Koohestani, M. Ettorre, M. Zhadobov. Local Dosimetry Applied to Wireless Power Transfer Around 10 MHz Dependence on em Parameters and Tissues Morphology. IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology, 2018, 2 (2), pp.123-130. ⟨10.1109/JERM.2018.2822478⟩. ⟨hal-02121356⟩

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