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Measurement and Computational Modeling of Radio-Frequency Electromagnetic Power Density Around GSM Base Transceiver Station Antennas | ||
| AUT Journal of Electrical Engineering | ||
| مقاله 8، دوره 49، شماره 2، اسفند 2017، صفحه 179-186 اصل مقاله (2.3 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/eej.2017.12018.5026 | ||
| نویسندگان | ||
| P. Nassiri1؛ M. Saviz2؛ M. Helmi-kohnehShahri* 1؛ M. Pourhosein1؛ R. Divani1 | ||
| 1Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran | ||
| 2Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran | ||
| چکیده | ||
| Evaluating the power densities emitted by GSM1800 and GSM900 BTS antennas is conducted via two methods. Measurements are carried out in half a square meter grids around two antennas. CST Microwave STUDIO software is employed to estimate the power densities in order for detailed antenna and tower modeling and simulation of power density. Finally, measurements obtained from computational and experimental methods were compared through the contour lines using the statistical Surfer software. After measuring and simulating all values, it turns out that power density is generally lower than the permissible exposure limits although exceeds the limits in some sample points . According to the measurements, simulation error in stations GSM900 and GSM1800 are 10% and 8%, respectively. Findings from contour-line-maps illustrates that direct measurement method follows the same emission pattern as the computational method does. It validates the computational approach and the models attained for BTS power density estimation. | ||
| کلیدواژه‌ها | ||
| BTS antenna؛ Simulation؛ Power density؛ permissible exposure limits | ||
| مراجع | ||
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[1] P. Ushie, V.U. Nwankwo, A. Bolaji, O. Osahun, Measurement and Analysis of Radio-frequency Radiation Exposure Level from Different Mobile Base Transceiver Stations in Ajaokuta and Environs, Nigeria, arXiv preprint arXiv:1306.1475, (2013).
[2] P. Baltrėnas, R. Buckus, Indoor measurements of the power density close to mobile station antenna, (2011).
[3] Q.Q. He, W.C. Yang, Y.X. Hu, Accurate method to estimate EM radiation from a GSM base station, Progress In Electromagnetics Research M, 34 (2014) 19-27.
[4] M.A. Keow, S. Radiman, Assessment of radiofrequency/ microwave radiation emitted by the antennas of rooftop-mounted mobile phone base stations, Radiation protection dosimetry, 121(2) (2005) 122-127.
[5] S. Miclaus, P. Bechet, Estimated and measured values of the radiofrequency radiation power density around cellular base stations, Romanian Journal of Physics, 52(3/4) (2007) 429.
[6] W. Suwansin, P. Phasukkit, C. Pintavirooj, A. Sanpanich, Analysis of heat transfer and specific absorption rate of electromagnetic field in human body at 915 MHz and 2.45 GHz with 3D finite element method, in: Biomedical Engineering International Conference (BMEiCON), 2012, IEEE, 2012, pp. 1-4.
[7] S. Banik, S. Bandyopadhyay, S. Ganguly, Bioeffects of microwave––a brief review, Bioresource technology, 87(2) (2003) 155-159.
[8] A. Khavanin, Nonthermal Effects of Radar Exposure on Human: A Review Article, Iranian Journal of Health, Safety and Environment, 1(1) (2014) 43-52.
[9] A. Vander Vorst, A. Rosen, Y. Kotsuka, RF/microwave interaction with biological tissues, John Wiley & Sons, 2006.
[10] T. Alanko, M. Hietanen, P. Von Nandelstadh, Occupational exposure to RF fields from base station antennas on rooftops, annals of telecommunications-annales des télécommunications, 63(1-2) (2008) 125-132.
[11] R. Kitchen, RF and microwave radiation safety handbook, Newnes, 2001.
[12] I.C.o.N.-I.R. Protection, Guidelines for limiting exposure to time-varying electric and magnetic fields (1 Hz to 100 kHz), Health physics, 99(6) (2010) 818-836.
[13] R.G. Sargent, Verification and validation of simulation models, in: Proceedings of the 37th conference on Winter simulation, winter simulation conference, 2005, pp. 130-143.
[14] Y. Alfadhl, Numerical evaluations on the interaction of electromagnetic fields with animals and with biological tissues, University of London, 2006.
[15] Roof Top guide 122-A, n.kouhestani cartographer2015.
[16] Roof Top guide 195-A n.kouhestani, cartographer2015
[17] P. Gajšek, D. šimunic, Occupational exposure to base stations—compliance with EU Directive 2004/40/ EC, International Journal of Occupational Safety and Ergonomics, 12(2) (2006) 187-194. | ||
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