Analysis of Electric Stress in Human Head in High-frequency Low-power Electromagnetic Environment_Journal of Biomedical Engineering

Authors：

 ZHOUYongjun ¹ , ZHANGHui ¹ , NIUZhongqi ²

1. School of Physic and Electronic Engineering, Xianyang Normal University, Xianyang 712000, China;
2. School of Electronic Engineering, Xidian University, Xi'an 710071, China;

Corresponding author：

ZHOUYongjun, Email: hoozyj@tom.com

Keywords：

cell phone radiation; head; electric stress; safety; the finite difference time domain method

DOI：

10.7507/1001-5515.20150054

Video：

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Action of electromagnetic radiation exerting on human body has been a concerned issue for people. Because electromagnetic waves could generate an electric stress in a discontinuous medium, we used the finite difference time domain (FDTD) as calculation methods to calculate the electric stress and its distribution in human head caused by high-frequency low-power electromagnetic environment, which was generated by dual-band (900 MHz and 1 800 MHz) PIFA antennas with radiated power 1 W, and we then performed the safety evaluation of cell phone radiation from the angle whether the electric stress further reached the human hearing threshold. The result showed that there existed the electric stress at the interface of different permittivity organization caused by the two kinds of high-frequency low-power electromagnetic environment and the maximum electric stress was located at the interface between skin and air of the phone side, and the electric stress peak at skull did not reach the threshold of auditory caused by bone tissue conduction so that it can not produce auditory effects.

Citation： ZHOUYongjun, ZHANGHui, NIUZhongqi. Analysis of Electric Stress in Human Head in High-frequency Low-power Electromagnetic Environment. Journal of Biomedical Engineering, 2015, 32(2): 295-299. doi: 10.7507/1001-5515.20150054 Copy

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2. BORTH D E, CAIN C A. Theoretical analysis of acoustic signal generation in materials irradiated with microwave energy[J]. IEEE Trans Microwave Theory Techn, 1977, MTT-25:944-953.
3. GANDHI O P, RIAZI A. Absorption of millimeter waves by human beings and its biological implications[J]. IEEE Trans Microwave Theory Techn, 1986, 34:228-235.
4. 牛中奇.脉冲调制微波的听觉效应[J].微波学报, 1987, 4:45-52.
5. SULIVAN M. Z-transform theory and the FDTD method[J]. IEEE Trans Antennas Propagation, 1996, 44(1):28-34.
6. 冯慈璋.静态电磁场[M].西安:西安交通大学出版社, 1985:80-100.
7. 牛中奇.细胞膜上的自电场应力[J].中国生物医学工程学报, 1994, 13(1):90-95.
8. Visible human anatomy[DB/OL]. (2006-06-01)[2012-06-09]. http://www.uchsc.edu/sm/chs/open.html.
9. Italian national research council[DB/OL].(2007-05-09)[2010-08-23]. http://niremf.ifac.cnr.it/tissprop/.
10. 葛德彪, 闫玉波.电磁波时域有限差分方法[M].第3版.西安:西安电子科技大学出版社, 2011:1-89.
11. 倪光正, 杨仕友, 邱捷.工程电磁场数值计算[M].第2版.北京:机械工业出版社, 2010:58-276.
12. MOAVENI S.王崧, 刘丽娟, 董春敏译.有限元分析-ANASYS理论与应用[M].第3版, 北京:电子工业出版社, 2013:100-168.
13. 黄韬, 吕建红, 彭继文, 等.基于矩量法的输电线路工频电磁场实测与计算分析[J].高压电器, 2013, 49(2):30-35.
14. ICNIRP. 1998. Guidelines for limiting exposure to time varying electric, magnetic and electromagnetic field (up to 300GHz)[R]. Health Physics, 74:494-522.

Journal of Biomedical Engineering

Analysis of Electric Stress in Human Head in High-frequency Low-power Electromagnetic Environment

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