Electromagnetic field exposure to human head model with various metal objects at sub-6 GHz frequencies.

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-07-03 Epub Date: 2023-06-04 DOI:10.1080/15368378.2023.2220736

Niyazi İl, Kayhan Ateş, Şükrü Özen

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Abstract

In recent years, the interactions of metal objects in human body with electromagnetic fields caused by devices working at fifth-generation (5G) frequencies have been studied by various researchers. A motivation behind this research was to evaluate the human body absorption of electromagnetic energy operating at sub-6 GHz 5G applications. According to this, the specific absorption rate (SAR) caused by new generation mobile phones was investigated in human heads wearing metal-framed spectacles and having metallic implants or earrings to analyse electromagnetic field exposure. A realistic human head model, including some metal objects, was numerically calculated, and analysed in terms of non-ionizing dosimetry. Simulations were carried out with the finite integration technique (FIT) based commercial software in the frequencies of 0.9, 1.8, 2.1, 2.45, 3.5 and 5 GHz, respectively. The maximum SAR of 14 × 10^-5 W/kg for 10 g average tissue was calculated at 2.45 GHz frequency in the head model with earrings. The highest electric field strength of 0.52 V/m was observed at a 1.8 GHz frequency in the head model with all metal objects equipped. Results show that metal objects such as spectacles, dental implants and earrings can cause an increase in the SAR values for external biological tissues, and metal objects can behave as a kind of shield for deeper tissues. However, the obtained values are below the limits of international organisations.

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在低于6GHz的频率下，暴露于具有各种金属物体的人类头部模型的电磁场。

近年来，各种研究人员研究了人体内金属物体与第五代（5G）频率设备产生的电磁场的相互作用。这项研究的动机是评估人体对亚6级电磁能的吸收 GHz 5G应用。据此，研究了新一代手机在佩戴金属框眼镜和金属植入物或耳环的人头中引起的比吸收率（SAR），以分析电磁场暴露。对包括一些金属物体在内的逼真的人头模型进行了数值计算，并根据非电离剂量测定法进行了分析。使用基于有限积分技术（FIT）的商业软件在0.9、1.8、2.1、2.45、3.5和5的频率下进行模拟 GHz。最大SAR为14 × 10-5 W/kg，适用于10 g平均组织计算为2.45 GHz频率的头模型与耳环。0.52的最高电场强度在1.8 配备全金属物体的头部模型中的GHz频率。结果表明，眼镜、牙科植入物和耳环等金属物体会导致外部生物组织的SAR值增加，而金属物体可以作为深层组织的屏障。然而，所获得的价值低于国际组织的限制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.