在民用通信系统辐射下对地铁乘客的电磁暴露分析
Wen-Ying Zhou1, Xi-Yu Zhang1, Mai Lu1
1Key Laboratory of Opto-Electronic Technology and Intelligent Control of Ministry of Education, Lanzhou Jiaotong University, Lanzhou, China.
PloS one
|March 11, 2024
概括
这项研究模拟了地铁电磁暴露,发现LCX1电缆与LCX2.2相比,减少了乘客的无线电频率 (RF) 剂量. 结果证实了民用通信系统下的乘客安全,提供了一个新的电磁保护策略.
科学领域:
- 电磁兼容性 电磁兼容性
- 公共卫生 公共卫生
- 无线电频率工程是什么意思
背景情况:
- 地铁通信系统会产生射频 (RF) 电磁场.
- 评估乘客暴露对于公共安全至关重要.
- 现有系统需要对潜在的健康影响进行评估.
研究的目的:
- 评估乘客在地铁环境中的电磁暴露安全性.
- 为了比较乘客吸收的射频剂量,使用两个不同的漏电同轴电缆 (LCX) 模型.
- 研究一种新的LCX设计,以降低特定吸收率 (SAR) 和增强5G覆盖率.
主要方法:
- 使用COMSOL多物理建立了一个地铁车电磁环境模型.
- 包括1-1/4" (LCX1) 和1-5/8" (LCX2) 泄漏的同轴电缆作为射频源.
- 通过实地测量验证了模型,并分析了乘客暴露剂量分布.
主要成果:
- 与LCX2.2相比,LCX1在2100MHz下降了乘客吸收的电磁剂量9.19%,在2600MHz下降了22.50%,与LCX2相比.
- 最大特定吸收率 (SAR) 为1.91×10-4 W/Kg,在3400 MHz时,LCX1的温度上升为0.214 K.
- 模拟的暴露水平低于国际非电离辐射保护委员会 (ICNIRP) 的限制.
结论:
- 在研究的地铁民用通信系统中,乘客免受电磁辐射的影响.
- LCX1设计提供了改进的5G信号覆盖,同时降低了乘客SAR.
- 调整辐射源的性能是减少公共电磁暴露剂量的可行方法.
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