EM Radiation Thermal Effects Simulation Study on a Realistic Female Model at Some Frequencies
Keywords:
Electromagnetic field (EMF), SAR, S11, Inhomogeneous human model, FDTD methodAbstract
The purpose of research is to develop a computer simulation based mobile phone safety testing scheme that is well suited for testing any mobile phone antenna at different communication frequencies and various realistic scenarios. It has been shown how feasible the study of realistic models is, what difficulties may occur, what effects, moments appear in the modeling process.
The aim of the study is also to show the need for changes in the standard of mobile phone safety testing and to investigate the possibilities of implementing these changes. It is preferable for manufacturers to perform testing using human realistic models through numerical calculations and conduct safety compliance testing under realistic conditions to produce more realistic picture. Computer modeling gives the possibility to consider various realistic models, realistic scenarios and different tissue dielectric properties according to the frequency.
It was investigated how mobile phone antenna radiation parameters (S11 reflection coefficient) change according to the various positions of the hand and fingers at standard communication 2100 MHz and 3700 MHz frequencies; were estimated Specific Absorption Rate (SAR) values in the human head and their dependence on S11 parameters were studied. Based on the obtained results, it has been shown that the preferred S11 behavior should be one of the indicators in the phone safety standards. For this, manufacturers should carry out mobile phone antenna matching/S11 parameter testing with free space.
References
C. H. See, R. A. Abd-Alhameed, S. W. J. Chung, D. Zhou, H. Al-Ahmad, P. S. Excell, “The design of a resistively loaded bowtie antenna for applications in breast cancer detection systems,” IEEE Trans. Antennas Propag., vol. 60, pp. 2526–2530, 2012. https://doi.org/10.1109/TAP.2012.2189730.
A. F. Mirza, C. H. See, I. M. Danjuma, R. Asif, R. A. Abd-Alhameed, J. M. Noras, R.W. Clarke, P.S. Excell, “An active microwave sensor for near field imaging,” IEEE Sens. J., vol. 17, pp.2749–2757, 2017. https://doi.org/10.1109/JSEN.2017.2673961.
M. Alibakhshikenari, B.S. Virdee, P. Shukla, N.O. Parchin, L. Azpilicueta, C.H. See, R.A. Abd-Alhameed, F. Falcone, I. Huynen, and T.A. Denidni, “Metamaterial-inspired antenna array for application in microwave breast imaging systems for tumor detection,” IEEE Access, vol. 8, pp. 174667–174678, 2020. https://doi.org/10.1109/ACCESS.2020.3025672.
S. Song, J. Zheng, Y. Wang, Q. Wang, W. Kainz, S.A. Long, J. Chen, “Dual-frequency high-electric-field generator for MRI safety testing of passive implantable medical devices,” IEEE Trans. Microw. Theory Tech., vol. 68, pp.5423–5431, 2020. https://doi.org/10.1109/TMTT.2020.3030789.
E. Mileusnić, “Human exposure to electromagnetic fields,” Journal of Energy – Energija, vol. 55, no. 5, pp. 550-577, 2006. https://doi.org/10.37798/2006555399.
NNNRPB, “Board statement on restrictions on human exposure to static and time varying electromagnetic fields and radiation,”Doc. Natl. Radiol. Prot. Board,no. 4, pp. 1–69, 1993.
“IEEE standard for safety levels with respect to human exposure to radio frequency electromagnetic-fields, 3 kHz to 300 GHz,” IEEE: New York, NY, USA, no. 95, pp. 1–1999, 1999.
“IICNIRP. Guidelines for limiting exposure to time-varying electric, magnetic and electromagnetic fields (up 300 GHz), International Commission on Non-Ionising Radiation Protection,”Health Phys., vol. 56, pp. 494–522, 1998.
Z. Szilágyi, Z. Németh, J. Bakos, G. Kubinyi, P.P. Necz, E. Szabó, G. Thuróczy, R. Pinto, B. Selmaoui, “Assessment of inflammation in 3D reconstructed human skin exposed to combined exposure to ultraviolet and Wi-Fi radiation,” Int. J. Mol. Sci., vol. 24, issue 3, article 2853, 2023. https://doi.org/10.3390/ijms24032853.
M. Abdul-Al, A.S.I. Amar, I. Elfergani, R. Littlehales, N. Ojaroudi Parchin, Y. Al-Yasir, C.H. See, D. Zhou, Z. Zainal Abidin, M. Alibakhshikenari, et al. “Wireless electromagnetic radiation assessment based on the specific absorption rate (SAR): A review case study,” Electronics, vol. 11, issue 4, article 511, pp.1-31, 2022. https://doi.org/10.3390/electronics11040511.
R.Vehovsky, M. Pokorny, K. Pitra, “User hand influence on properties of a dual-band PIFA antenna,” Radioengineering, vol. 23, issue 3, pp.819-823, 2014.
M. R. I. Faruque, M. I. Hossain, “Effects of hand on EM absorbtion and antenna performances for internal handset PIFA,” Technical Gazette, vol. 24, issue 2, pp. 459-467, 2017. https://doi.org/10.17559/TV-20140627085148.
T. Nozadze, V. Jeladze, M.Tsverava, M. Prishvin, R.Zaridze, “EM exposure study on an inhomogeneous child model considering hand effect,” Proceedings of the IEEE First Ukraine Conference on Electrical and Computer Engineering, 2017, pp. 51–54. https://doi.org/10.1109/UKRCON.2017.8100484.
T. Nozadze, V. Jeladze, R. Zaridze, “Mobile antenna matching study considering different holding positions at 2100 MHz frequency,”Proceedings of the International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory DIPED-2020, 2020, pp. 121–125. https://doi.org/10.1109/DIPED49797.2020.9273363.
T. Nozadze, K. Henke, M. Kurtsikidze, V. Jeladze, G. Ghvedashvili, R. Zaridze, “Study how the hand effects on the mobile phone dipole antenna matching conditions to the free space at 3700 MHz frequency,” Proceedings of the UkrMW 2022, 2022, pp. 439–443. https://doi.org/10.1109/UkrMW58013.2022.10037056.
N. B. A. Rahman, A. A. Al-Hadi, S. Norlyana, “Impedance analysis of mobile phone antenna in the presence of user’s hand,” Proceedings of the2017 International Conference on Emerging Electronic Solutions for IoT (ICEESI 2017),2017, vol. 140, article 01031, pp.1-6. https://doi.org/10.1051/matecconf/201714001031.
I. H. Ali, H. I. Hamd, A. I. Abdalla, “Design and comparison of two types of antennas for SAR calculation in wireless applications,” Advances in Science and Engineering Technology International Conferences, ASET,2018, pp. 1-5. https://doi.org/10.1109/ICASET.2018.8376891.
R. Khan, A. Al-Handi, P. J. Soh, M. R. Kamarudin, M. T. Ali, “User influence on mobile terminal antennas: a review of challenges and potential solution for 5G antennas,” IEEE Access, vol. 6, issue 1, pp. 77695-77715, 2018. https://doi.org/10.1109/ACCESS.2018.2883788.
A. AlAmmouri, J. Mo, B. L. Ng, J. C. Zhang, J. G. Andrews, “Hand grip impact on 5G mm wave mobile devices,” IEEE Access,vol. 7, pp. 60532-60544, 2019. https://doi.org/10.1109/ACCESS.2019.2914685.
P. A. Hasgall, F. Di Gennaro, C. Baumgartner, E. Neufeld, B. Lloyd, M. C. Gosselin, D. Payne, A.Klingenböck, N. Kuster, “IT’IS database for thermal and electromagnetic parameters of biological tissues,” Version 4.1, 2022.
S. A. Abdulrazzaq, J. S. Aziz. “SAR simulation in human head exposed to RF signals and safety precautions,” IJCSET,vol. 3, issue 9, pp.334-340, 2013.
C. Hu, H. Zuo, Y. Li, “Effects of radiofrequency electromagnetic radiation on neurotransmitters in the brain,” Front. Public Health, vol. 9, article 691880, pp. 1-15, 2021. https://doi.org/10.3389/fpubh.2021.691880.
J. Keshvari, M. Kivento, A. Christ, G. Bit-Babik, “Large scale study on the variation of RF energy absorption in the head & brain regions of adults and children and evaluation of the SAM phantom conservativeness,”Phys. Med. Biol,vol. 61, pp. 2991–3008, 2016. https://doi.org/10.1088/0031-9155/61/8/2991.
J.-H. Moon, “Health effects of electromagnetic fields on children,” Clinical and Experimental Pediatrics, vol. 63, issue 11, pp. 422-428, 2020. https://doi.org/10.3345/cep.2019.01494.
C. H. Li, E. Ofli, N. Chavannes, N. Kuster, “Effects of hand phantom on mobile phone antenna performance,”IEEE Transactions on Antennas and Propagation, vol. 57, issue 9, pp. 2763–2770, 2009. https://doi.org/10.1109/TAP.2009.2027081.
J. E. McCredden, S. Weller, V. Leach, “The assumption of safety is being used to justify the rollout of 5G technologies,” Front. Public Health,vol. 11, issue 2023, pp. 1-9, 2023. https://doi.org/10.3389/fpubh.2023.1058454.
İl Niyazi, A. Kayhan, Ö. Şükrü, “Electromagnetic field exposure to human head model with various metal objects at sub-6 GHz frequencies,” Electromagnetic Biology and Medicine, vol. 42, issue 3, pp. 114-122, 2023. https://doi.org/10.1080/15368378.2023.2220736.
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