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首页> 外文期刊>Environmental research >The human skin as a sub-THz receiver - Does 5G pose a danger to it or not?
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The human skin as a sub-THz receiver - Does 5G pose a danger to it or not?

机译：人体皮肤作为次THz接收器-5G是否会对它构成危险？

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In the interaction of microwave radiation and human beings, the skin is traditionally considered as just an absorbing sponge stratum filled with water. In previous works, we showed that this view is flawed when we demonstrated that the coiled portion of the sweat duct in upper skin layer is regarded as a helical antenna in the sub-THz band. Experimentally we showed that the reflectance of the human skin in the sub-THz region depends on the intensity of perspiration, i.e. sweat duct's conductivity, and correlates with levels of human stress (physical, mental and emotional). Later on, we detected circular dichroism in the reflectance from the skin, a signature of the axial mode of a helical antenna. The full ramifications of what these findings represent in the human condition are still unclear. We also revealed correlation of electrocardiography (ECG) parameters to the sub-THz reflection coefficient of human skin. In a recent work, we developed a unique simulation tool of human skin, taking into account the skin multi-layer structure together with the helical segment of the sweat duct embedded in it. The presence of the sweat duct led to a high specific absorption rate (SAR) of the skin in extremely high frequency band. In this paper, we summarize the physical evidence for this phenomenon and consider its implication for the future exploitation of the electromagnetic spectrum by wireless communication. Starting from July 2016 the US Federal Communications Commission (FCC) has adopted new rules for wireless broadband operations above 24 GHz (5G). This trend of exploitation is predicted to expand to higher frequencies in the sub-THz region. One must consider the implications of human immersion in the electromagnetic noise, caused by devices working at the very same frequencies as those, to which the sweat duct (as a helical antenna) is most attuned. We are raising a warning flag against the unrestricted use of sub-THz technologies for communication, before the possible consequences for public health are explored.
机译：在微波辐射与人类的相互作用中，传统上将皮肤视为只是一个充满水的吸收海绵层。在以前的工作中，当我们证明上皮层的​​汗管的盘绕部分被视为低于太赫兹频带的螺旋天线时，这种观点是有缺陷的。实验表明，在太赫兹区域内，人体皮肤的反射率取决于汗液的强度，即汗管的电导率，并与人体压力水平（生理，心理和情绪）相关。后来，我们在皮肤反射中检测到圆二色性，这是螺旋天线轴向模式的特征。这些发现在人类状况中代表什么的全部结果仍不清楚。我们还揭示了心电图（ECG）参数与人类皮肤的亚太赫兹反射系数之间的相关性。在最近的工作中，我们考虑到皮肤的多层结构以及嵌入其中的汗管的螺旋段，开发了一种独特的人体皮肤模拟工具。汗管的存在导致在极高的频带中皮肤的高比吸收率（SAR）。在本文中，我们总结了这种现象的物理证据，并考虑了其对未来无线通信利用电磁频谱的意义。从2016年7月开始，美国联邦通信委员会（FCC）对24 GHz（5G）以上的无线宽带操作采用了新规则。预计这种发展趋势将扩展到亚太赫兹区域的更高频率。必须考虑人体沉浸在电磁噪声中的影响，电磁噪声是由工作频率与汗管（作为螺旋形天线）最协调的频率相同的设备引起的。在探讨对公共卫生可能造成的后果之前，我们正在发出警告信号，禁止无限制地使用次太赫兹技术进行通信。

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