Abstract

This paper presents a series of electromagnetic field measurements performed on the campus of Ferdowsi University of Mashhad in order to assess the compliance of radiation levels of cellular base stations and WiFi access points with international guidelines. A calibrated, broadband and isotropic probe is used and recommendations of International Telecommunication Union (ITU) are followed up throughout measurements. More than 300 outdoor and indoor locations have been systematically chosen for measurements. The recorded data are post-processed and compared with the guideline of International Commission on Non-Ionizing Radiation Protection (ICNIRP). Measured power densities of WiFi access points are low and do not exceed 1% of the level allowed by ICNIRP. For cellular base stations, measured power density is usually low outdoors, but reaches up to 16% of the allowed radiation level in publicly accessible indoor locations. Comprehensive exposure assessment, as recommended by ITU, has been performed to estimate the maximum possible radiation of one indoor base station. It is concluded that precautionary actions have to be taken by university authorities to limit the presence of students in close proximity to specific indoor antennas. Moreover, comprehensive exposure assessment is more likely necessary for indoor base stations whereas such assessment is not usually required outdoors.

中文翻译：

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评估基站和WIFI接入点辐射的电磁场是否符合大学校园国际指南

摘要

本文介绍了在马什哈德费多西大学校园内进行的一系列电磁场测量，目的是评估蜂窝基站和WiFi接入点的辐射水平是否符合国际准则。使用校准的宽带和各向同性探头，并在整个测量过程中遵循国际电信联盟（ITU）的建议。系统地选择了300多个室外和室内位置进行测量。记录的数据经过后处理，并与国际非电离辐射防护委员会（ICNIRP）的指南进行比较。WiFi接入点的测量功率密度很低，并且不超过ICNIRP允许水平的1％。对于蜂窝基站，户外测量的功率密度通常较低，但在可公共进入的室内位置达到允许辐射水平的16％。按照国际电联的建议，已经进行了全面的暴露评估，以估算一个室内基站的最大可能辐射。结论是，大学当局必须采取预防措施，以限制学生靠近特定室内天线的存在。此外，室内基站更可能需要进行全面的暴露评估，而室外通常不需要进行这种评估。结论是，大学当局必须采取预防措施，以限制学生靠近特定室内天线的存在。此外，室内基站更可能需要进行全面的暴露评估，而室外通常不需要进行这种评估。结论是，大学当局必须采取预防措施，以限制学生靠近特定室内天线的存在。此外，室内基站更可能需要进行全面的暴露评估，而室外通常不需要进行这种评估。