This paper empirically investigates the body induced electromagnetic (EM) effects, namely the human body blockage, by conducting indoor measurement campaigns in the unexplored sub-THz W-band (75-110 GHz) and G-band (170-260 GHz). The proposed analysis focuses on both the alterations of channel frequency response induced by body presence, fully or partially obstructing the line-of-sight (LoS) between transmitter and recevier, as well as on the channel impulse response (CIR) for selected movements of the target, i.e. crossing the LoS of the radio link. Modelling of large scale parameters is also presented using a phantom body object. The proposed study has applications in device-free radio localization and radio frequency (RF) sensing scenarios where the EM radiation or environmental radio signals are collected and processed to detect and locate people without requiring them to wear any electronic devices. Although preliminary, the study reveals that discrimination of the blockage micro-movements is possible, achieving higher precision compared to classical RF sensing and localization using cm-scale wavelengths (2.4-6GHz bands).

该研究通过进行室内测量，实证研究了人体诱导的电磁效应，特别是在未经探索的次太赫兹W波段(75-110 GHz)和G波段(170-260 GHz)中对人体阻挡进行了研究。该研究以目标的选择性运动为重点，分析了阻挡引起的信道频率响应的变化，以及射频链路的目标运动所产生的信道脉冲响应。同时，还提出了使用仿体物体对大尺度参数进行建模的方法。该研究对无装置射频定位和射频感应场景具有应用价值，其中电磁辐射或环境射频信号被收集和处理以检测和定位人体位置，而无需人体佩戴任何电子设备。尽管属于初步研究，该研究表明了通过微动作辨别阻挡的可能性，相比使用厘米级波长(2.4-6GHz频段)的经典射频感应和定位，可以实现更高的精度。

次毫米波射频传播中人体尺度障碍初步研究及其在室内无源定位中的应用