Unveiling the Dynamics of Millimeter Wave (5G) Energy Absorption in Human Tissue: A Comprehensive Analysis at the Free Space - Human Skin Interface

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Biowei Godday; Adekola Sulaiman A.; Amusa Kamoli A.

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Journal Paper

Paper Information

Journal: IRANIAN JOURNAL OF ELECTRICAL AND ELECTRONIC ENGINEERING Year:621 | Volume: | Issue: Page(s): 134-148

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Title

Unveiling the Dynamics of Millimeter Wave (5G) Energy Absorption in Human Tissue: A Comprehensive Analysis at the Free Space - Human Skin Interface

Author(s)

Biowei Godday | Adekola Sulaiman A. | Amusa Kamoli A. | Issue Writer Certificate

Keywords

5G mmWaveQ4

Fresnel equationsQ4

human tissueQ4

Brewster angleQ4

Abstract

This paper investigates the dynamics of mmWave at the free space-human skin interface. The four Fresnel equations tailored for parallel and perpendicular polarizations, are employed in the analysis. The research reveals that for human tissue with relative permittivities (18.99, 15.51, 13.35, 11.69, 10.40) and conductivities (22.48, 27.09, 29.76, 31.79, 33.38) S/m, when exposed to 5G mmWave frequencies (24, 30, 35, 40, 45) GHz, respectively, exhibits Brewster angles of (79º, 78º, 77º, 76º, 75º), respectively. Additionally, it is shown that Brewster angles exist between 60º and 80º which aligns with existing literature using Gabriel’s skin model. To further validate obtained results, use is made of the results of the Gabriel’s skin model at (40, 60, 80, 100) GHz with the respective permittivities and conductivities, to generate new power reflection coefficients for the parallel and perpendicular polarizations for the sake of comparative analysis. First, comparisons of the curves for the Gabriel’s skin model reported in the literature with this work, show fairly good agreements. Second, the Brewster angles of (78º, 76º, 74º, 73º) obtained from this work, for the respective frequencies compare favorably with (75º, 74º, 70º, 69º) extracted from Gabriel’s skin model curves reported in the literature, with all values falling within the expected range of 60º to 80º.

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