Microwave power penetration enhancement inside an inhomogeneous human head

Abstract The penetration of microwave power inside a human head model is improved by employing a dielectric loaded rectangular waveguide as the transmission source. A multi-layer reflection model is investigated to evaluate the combined material characteristics of different lossy human head tissues...

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Autores principales:	Md. Rokunuzzaman, Asif Ahmed, Thomas Baum, Wayne S. T. Rowe
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f82a4c09dae8412f86a0d92e8e9a940e
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spelling	oai:doaj.org-article:f82a4c09dae8412f86a0d92e8e9a940e2021-11-14T12:23:09ZMicrowave power penetration enhancement inside an inhomogeneous human head10.1038/s41598-021-01293-42045-2322https://doaj.org/article/f82a4c09dae8412f86a0d92e8e9a940e2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01293-4https://doaj.org/toc/2045-2322Abstract The penetration of microwave power inside a human head model is improved by employing a dielectric loaded rectangular waveguide as the transmission source. A multi-layer reflection model is investigated to evaluate the combined material characteristics of different lossy human head tissues at 2.45 GHz. A waveguide loaded with a calculated permittivity of 3.62 is shown to maximise the microwave power penetration at the desired frequency. A Quartz (SiO 2) loaded rectangular waveguide fed by a microstrip antenna is designed to validate the power penetration improvement inside an inhomogeneous human head phantom. A measured 1.33 dB power penetration increment is observed for the dielectric loaded waveguide over a standard rectangular waveguide at 50 mm inside the head, with an 81.9% reduction in the size of the transmission source.Md. RokunuzzamanAsif AhmedThomas BaumWayne S. T. RoweNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Md. Rokunuzzaman Asif Ahmed Thomas Baum Wayne S. T. Rowe Microwave power penetration enhancement inside an inhomogeneous human head
description	Abstract The penetration of microwave power inside a human head model is improved by employing a dielectric loaded rectangular waveguide as the transmission source. A multi-layer reflection model is investigated to evaluate the combined material characteristics of different lossy human head tissues at 2.45 GHz. A waveguide loaded with a calculated permittivity of 3.62 is shown to maximise the microwave power penetration at the desired frequency. A Quartz (SiO 2) loaded rectangular waveguide fed by a microstrip antenna is designed to validate the power penetration improvement inside an inhomogeneous human head phantom. A measured 1.33 dB power penetration increment is observed for the dielectric loaded waveguide over a standard rectangular waveguide at 50 mm inside the head, with an 81.9% reduction in the size of the transmission source.
format	article
author	Md. Rokunuzzaman Asif Ahmed Thomas Baum Wayne S. T. Rowe
author_facet	Md. Rokunuzzaman Asif Ahmed Thomas Baum Wayne S. T. Rowe
author_sort	Md. Rokunuzzaman
title	Microwave power penetration enhancement inside an inhomogeneous human head
title_short	Microwave power penetration enhancement inside an inhomogeneous human head
title_full	Microwave power penetration enhancement inside an inhomogeneous human head
title_fullStr	Microwave power penetration enhancement inside an inhomogeneous human head
title_full_unstemmed	Microwave power penetration enhancement inside an inhomogeneous human head
title_sort	microwave power penetration enhancement inside an inhomogeneous human head
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f82a4c09dae8412f86a0d92e8e9a940e
work_keys_str_mv	AT mdrokunuzzaman microwavepowerpenetrationenhancementinsideaninhomogeneoushumanhead AT asifahmed microwavepowerpenetrationenhancementinsideaninhomogeneoushumanhead AT thomasbaum microwavepowerpenetrationenhancementinsideaninhomogeneoushumanhead AT waynestrowe microwavepowerpenetrationenhancementinsideaninhomogeneoushumanhead
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Microwave power penetration enhancement inside an inhomogeneous human head

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