Measurement and Computational Modeling of Radio-Frequency Electromagnetic Power Density Around GSM Base Transceiver Station Antennas

Document Type : Research Article

Authors

1 Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

2 Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran

Abstract

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.

Keywords

Main Subjects


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