Power Absorption and Skin Temperature Rise From Simultaneous Near-Field Exposure at 2 and 28 GHz

In international guidelines and standards for human protection from electromagnetic fields, mass-averaged specific absorption rate (SAR) is used as a metric to prevent excessive temperature rise at frequencies from 100 kHz up to 6 GHz. Above this transition frequency, including the frequency region...

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Autores principales:	Norika Miura, Sachiko Kodera, Yinliang Diao, Junji Higashiyama, Yasunori Suzuki, Akimasa Hirata
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Human protection dosimetry standardization Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/4ae19a4bb7724261bc21ec12e68d059a
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spelling	oai:doaj.org-article:4ae19a4bb7724261bc21ec12e68d059a2021-11-20T00:01:23ZPower Absorption and Skin Temperature Rise From Simultaneous Near-Field Exposure at 2 and 28 GHz2169-353610.1109/ACCESS.2021.3126372https://doaj.org/article/4ae19a4bb7724261bc21ec12e68d059a2021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9606698/https://doaj.org/toc/2169-3536In international guidelines and standards for human protection from electromagnetic fields, mass-averaged specific absorption rate (SAR) is used as a metric to prevent excessive temperature rise at frequencies from 100 kHz up to 6 GHz. Above this transition frequency, including the frequency region assigned to fifth-generation (5G) wireless communication systems, area-averaged absorbed power density (APD) or epithelial power density is used as a physical quantity to specify restrictions on human exposure. In 5G wireless systems, frequencies above and below 6 GHz may be used simultaneously. The effect of the superposition of SAR and APD on temperature rise should be considered, especially regarding the prevention of excessive surface temperature. Herein, we considered simultaneous exposure from inverted-F antenna and patch antenna array operating at 2 and 28 GHz, respectively. Computational results showed that the effect of superposition was marginal. This result is attributable to the heat diffusion length in biological tissues (<inline-formula> <tex-math notation="LaTeX">$\sim 10$ </tex-math></inline-formula> mm). The effect of the superposition was higher than 15% only when the patch antenna array and inverted-F antenna were separated by less than 50 mm for the 5 mm antenna-body separation.Norika MiuraSachiko KoderaYinliang DiaoJunji HigashiyamaYasunori SuzukiAkimasa HirataIEEEarticleHuman protectiondosimetrystandardizationElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 152140-152149 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Human protection dosimetry standardization Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Human protection dosimetry standardization Electrical engineering. Electronics. Nuclear engineering TK1-9971 Norika Miura Sachiko Kodera Yinliang Diao Junji Higashiyama Yasunori Suzuki Akimasa Hirata Power Absorption and Skin Temperature Rise From Simultaneous Near-Field Exposure at 2 and 28 GHz
description	In international guidelines and standards for human protection from electromagnetic fields, mass-averaged specific absorption rate (SAR) is used as a metric to prevent excessive temperature rise at frequencies from 100 kHz up to 6 GHz. Above this transition frequency, including the frequency region assigned to fifth-generation (5G) wireless communication systems, area-averaged absorbed power density (APD) or epithelial power density is used as a physical quantity to specify restrictions on human exposure. In 5G wireless systems, frequencies above and below 6 GHz may be used simultaneously. The effect of the superposition of SAR and APD on temperature rise should be considered, especially regarding the prevention of excessive surface temperature. Herein, we considered simultaneous exposure from inverted-F antenna and patch antenna array operating at 2 and 28 GHz, respectively. Computational results showed that the effect of superposition was marginal. This result is attributable to the heat diffusion length in biological tissues (<inline-formula> <tex-math notation="LaTeX">$\sim 10$ </tex-math></inline-formula> mm). The effect of the superposition was higher than 15% only when the patch antenna array and inverted-F antenna were separated by less than 50 mm for the 5 mm antenna-body separation.
format	article
author	Norika Miura Sachiko Kodera Yinliang Diao Junji Higashiyama Yasunori Suzuki Akimasa Hirata
author_facet	Norika Miura Sachiko Kodera Yinliang Diao Junji Higashiyama Yasunori Suzuki Akimasa Hirata
author_sort	Norika Miura
title	Power Absorption and Skin Temperature Rise From Simultaneous Near-Field Exposure at 2 and 28 GHz
title_short	Power Absorption and Skin Temperature Rise From Simultaneous Near-Field Exposure at 2 and 28 GHz
title_full	Power Absorption and Skin Temperature Rise From Simultaneous Near-Field Exposure at 2 and 28 GHz
title_fullStr	Power Absorption and Skin Temperature Rise From Simultaneous Near-Field Exposure at 2 and 28 GHz
title_full_unstemmed	Power Absorption and Skin Temperature Rise From Simultaneous Near-Field Exposure at 2 and 28 GHz
title_sort	power absorption and skin temperature rise from simultaneous near-field exposure at 2 and 28 ghz
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/4ae19a4bb7724261bc21ec12e68d059a
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Power Absorption and Skin Temperature Rise From Simultaneous Near-Field Exposure at 2 and 28 GHz

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