Osei S, Amoako J K, Fletcher J J
Radiation Protection Institute, Ghana Atomic Energy Commission, PO Box LG 80, Legon, Accra, Ghana
Radiation Protection Institute, Ghana Atomic Energy Commission, PO Box LG 80, Legon, Accra, Ghana Graduate School of Nuclear and Allied Sciences, University of Ghana, Legon, Accra, Ghana.
Radiat Prot Dosimetry. 2016 Mar;168(3):419-26. doi: 10.1093/rpd/ncv326. Epub 2015 May 15.
A survey of the radiofrequency (RF) radiation was undertaken within the premises of two television (TV) stations, TVA and TVB, in Accra, Ghana. The primary objective of this study was to determine the level of RF exposure to workers in the TV stations. A spectrum analyser, a bi-conical antenna (30-300 MHz) and a log-periodic antenna (200 MHz-2.0 GHz) were used. Results obtained indicated that the wideband electric field strength levels recorded in this work vary between 0.006 and 58.5 V m(-1) at TVA and between 0.007 and 28.5 V m(-1) at TVB. Compared with the results from TVB, TVA recorded relatively higher values in the 30-400 MHz range, whereas TVB produced relatively higher values in the 400 MHz-1.7 GHz range. Generally, results obtained were found to be below the occupational reference levels of the International Commission on Non-Ionizing Radiation Protection, but at some locations, the field intensity was 4.3 times higher than the reference levels for the general public.
在加纳阿克拉的两家电视台TVA和TVB的场地内进行了射频（RF）辐射调查。本研究的主要目的是确定电视台工作人员的射频暴露水平。使用了一台频谱分析仪、一个双锥天线（30 - 300 MHz）和一个对数周期天线（200 MHz - 2.0 GHz）。获得的结果表明，在TVA记录的宽带电场强度水平在0.006至58.5 V m⁻¹之间，在TVB则在0.007至28.5 V m⁻¹之间。与TVB的结果相比，TVA在30 - 400 MHz范围内记录的值相对较高，而TVB在400 MHz - 1.7 GHz范围内产生的值相对较高。总体而言，获得的结果低于国际非电离辐射防护委员会的职业参考水平，但在一些地点，场强比一般公众的参考水平高4.3倍。
