摘要
针对居住在城市移动基站附近的居民日益关注的电磁辐射污染问题,通过移动基站近距离区域电磁场分布连续24h监测与分析,研究正常工作日内基站周围近距离区域电磁场功率密度随时间和距离的变化,以及功率密度的概率分布,并根据24h各时段内的话务量,使用统计分析(SAS)系统对此影响因素进行相关性分析.结果显示,一天内移动基站天线附近电磁辐射随时间呈现明显的波动,其功率密度的概率分布接近正态分布,手机的话务量与电磁场强度具有一定的相关性.在近距离区域,功率密度随距离增加,在一定距离上出现峰值,峰值出现的距离与天线高度有关.对我国一般的城市基站,环境电磁辐射低于标准限值.
Aiming at the problem of electromagnetic radiation pollution with attention paid increasingly from people living near the cellular base station, through 24-hour surveys and analysis of the distribution of electromagnetic field around cellular base stations, the power density change of electromagnetic fields vs. the time and distance in normal operating day and also the probability distribution of power density were studied. And based on the 24h telephone traffic in each time section, the Statistical Analysis System (SAS) was also used to analyze the correlation of this influence factor. The result showed that the electromagnetic radiation intensity near the antennae of cellular base station had obviously fluctuated character in one day, and the probability distribution of its power density approached normal distribution. The handset telephone traffic possessed definite relativity with the electromagnetic field intensity; around cellular base stations, the power density increased with distance; the peak value of power density appeared in a certain distance, and the distance was related with the height of antennae. For general urban base station in China, the environmental electromagnetic radiation is below the limits value of standard.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2002年第6期565-568,共4页
China Environmental Science
基金
杭州市环境保护局科研基金资助项目(200204)
关键词
移动基站
近距离区域
电磁辐射污染
话务量
正态分布
移动通讯
cellular base stations
nearby region
electromagnetic radiation pollution
telephone traffic
normal distribution
