Measurement and analysis of electromagnetic environment characteristics on Wangjiang campus of Sichuan University

摘要

In this paper, the electromagnetic environment (EME) characteristics on Wangjiang campus of Sichuan University, a typical densely populated urban area, are measured and analyzed. According to the people's daily routine, the EME measurements are performed during daytime, nighttime, weekday, and weekend, respectively. By measuring the electric field (E-field) values along the main roads on the campus, the maps of E-field spatial distribution are obtained. Results indicate that the EME on the campus is relatively stable. The probability density functions of three orthogonal components of E-field are all lognormal distribution and very similar to each other due to depolarization phenomenon and polarization rotation of multipath propagation. Moreover, the total E-field is also lognormal distribution because of the high linear correlation between the components. In addition, E-field were also measured over time on three different sites, playground, laboratory, and student dormitory, in order to get time-varying characteristics of the EME. Results suggest how the people's activities influence on EME. All measurements on Wangjiang campus show that the maximum E-field value is far below the regulatory exposure limits proposed by the International Commission on Non-Ionizing Radiation Protection.