Alhasnawi Mohammad Kaisb Layous, Abdulla Shahab, Fatseas David, Addie Ronald G
Faculty of Administration and Economics, Sumer University, Thi-Qar, Iraq.
School of Agricultural, Computational and Environmental Science, University of Southern Queensland, Toowoomba, Australia.
Heliyon. 2020 May 19;6(5):e03979. doi: 10.1016/j.heliyon.2020.e03979. eCollection 2020 May.
Environmental exposure to man-made electromagnetic field (EMF) has been rising as modern technologies have grown and changes in social behavior have generated more synthetic sources. For safety of human health, EMF levels need to be regulated. The level of EMF should be well below levels where there might be harm, hence we do not expect to see any health effects at these levels. Current regulations fail to place a strict limit on EMF in situations where multiple nearby devices transmit simultaneously. The way these regulations are expressed needs great care because it will have an effect on the design of wireless communication systems. In this paper, it is argued that transmitted power constraints on wireless communication devices should be expressed in a different way, namely that devices should limit the EMF spectral density that they generate to the difference between the maximum allowed, by the standard, and the amount currently present, as measured by the device, in the spectral region where it is active. Note that the limit on EMF should be expressed in terms of its rather than as a total EMF over each of a series of separate bands. If all devices limit their own EMF spectral density, in the spectral region where they are active, in such a way that total EMF spectral density is below the regulated limit in that region, then it is certain that the aggregate EMF spectral density will be below the regulated limit at all frequencies.
随着现代技术的发展以及社会行为的变化产生了更多人造源，环境中人造电磁场（EMF）的暴露一直在增加。为了人类健康安全，需要对电磁场水平进行监管。电磁场水平应远低于可能造成危害的水平，因此我们预计在这些水平下不会出现任何健康影响。当前的规定未能对多个附近设备同时发射时的电磁场设置严格限制。这些规定的表述方式需要格外谨慎，因为这会对无线通信系统的设计产生影响。本文认为，无线通信设备的发射功率限制应以不同方式表述，即设备应将其产生的电磁场频谱密度限制在标准允许的最大值与设备在其活跃频谱区域测量到的当前存在量之间的差值。请注意，电磁场的限制应以其频谱密度来表述，而不是以一系列单独频段上的总电磁场来表述。如果所有设备在其活跃的频谱区域限制自身的电磁场频谱密度，使得总电磁场频谱密度低于该区域的监管限制，那么可以确定在所有频率下总的电磁场频谱密度都将低于监管限制。
