Ayinmode B O, Farai I P
Department of physics, University of Ibadan, Oyo state, Nigeria.
Radiat Prot Dosimetry. 2013 Oct;156(4):424-8. doi: 10.1093/rpd/nct104. Epub 2013 Apr 25.
The variations of radiofrequency (RF) radiation power density with distance around some mobile phone base stations (BTSs), in ten randomly selected locations in Ibadan, western Nigeria, were studied. Measurements were made with a calibrated hand-held spectrum analyser. The maximum Global System of Mobile (GSM) communication 1800 signal power density was 323.91 µW m(-2) at 250 m radius of a BTS and that of GSM 900 was 1119.00 µW m(-2) at 200 m radius of another BTS. The estimated total maximum power density was 2972.00 µW m(-2) at 50 m radius of a different BTS. This study shows that the maximum carrier signal power density and the total maximum power density from a BTS may be observed averagely at 200 and 50 m of its radius, respectively. The result of this study demonstrates that exposure of people to RF radiation from phone BTSs in Ibadan city is far less than the recommended limits by International scientific bodies.
对尼日利亚西部伊巴丹随机选取的十个地点周围一些移动电话基站（BTS）的射频（RF）辐射功率密度随距离的变化情况进行了研究。使用校准过的手持式频谱分析仪进行测量。在一个基站半径250米处，全球移动通信系统（GSM）1800的最大信号功率密度为323.91微瓦每平方米，在另一个基站半径200米处，GSM 900的最大信号功率密度为1119.00微瓦每平方米。在另一个不同基站半径50米处，估计的总最大功率密度为2972.00微瓦每平方米。该研究表明，基站的最大载波信号功率密度和总最大功率密度分别平均可在其半径200米和50米处观测到。本研究结果表明，伊巴丹市居民接触来自电话基站的射频辐射远低于国际科学机构推荐的限值。
