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首页> 外文期刊>Bioelectromagnetics. >FDTD assessment of human exposure to electromagnetic fields from WiFi and bluetooth devices in some operating situations.
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FDTD assessment of human exposure to electromagnetic fields from WiFi and bluetooth devices in some operating situations.

机译：FDTD在某些操作情况下评估人体暴露于WiFi和蓝牙设备产生的电磁场的情况。

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摘要

In this work, the numerical dosimetry in human exposure to the electromagnetic fields from antennas of wireless devices, such as those of wireless local area networks (WLAN) access points or phone and computer peripherals with Bluetooth antennas, is analyzed with the objective of assessing guidelines compliance. Several geometrical configurations are considered to simulate possible exposure situations of a person to the fields from WLAN or Bluetooth antennas operating at 2400 MHz. The exposure to radiation from two sources of different frequencies when using a 1800 MHz GSM mobile phone connected via Bluetooth with a hands-free car kit is also considered. The finite-difference time-domain (FDTD) method is used to calculate electric and magnetic field values in the vicinity of the antennas and specific absorption rates (SAR) in a high-resolution model of the human head and torso, to be compared with the limits from the guidelines (reference levels and basic restrictions, respectively). Results show that the exposure levels in worst-case situations studied are lower than those obtained when analyzing the exposure to mobile phones, as could be expected because of the low power of the signals and the distance between the human and the antennas, with both field and SAR values being far below the limits established by the guidelines, even when considering the combined exposure to both a GSM and a Bluetooth antenna.
机译：在这项工作中，以评估准则为目标，分析了人体暴露于无线设备天线（例如，无线局域网（WLAN）接入点或带有蓝牙天线的电话和计算机外围设备）的天线的电磁场中的数值剂量学合规性。考虑了几种几何配置，以模拟一个人可能以2400 MHz运行的WLAN或蓝牙天线暴露于野外的情况。当使用通过蓝牙与免提车载套件连接的1800 MHz GSM移动电话时，也要考虑来自两个不同频率源的辐射。有限差分时域（FDTD）方法用于计算人体头部和躯干的高分辨率模型中天线附近的电场和磁场值以及比吸收率（SAR），以便与准则中的限制（分别为参考水平和基本限制）。结果表明，在所研究的最坏情况下的暴露水平低于分析移动电话的暴露水平，这是可以预期的，因为信号功率低，而且人与天线之间的距离在两个场均即使考虑将GSM和Bluetooth天线同时暴露在外，SAR值也远远低于准则所规定的限值。

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