Zhu Xiao-Qi, Guo Yong-Xin, Wu Wen
IEEE Trans Biomed Circuits Syst. 2017 Apr;11(2):474-482. doi: 10.1109/TBCAS.2016.2634121. Epub 2017 Mar 16.
This paper presents a systematic investigation of the capacitive human body communication (HBC). The measurement of HBC channels is performed using a novel battery-powered system to eliminate the effects of baluns, cables and instruments. To verify the measured results, a numerical model incorporating the entire HBC system is established. Besides, it is demonstrated that both the impedance and path gain bandwidths of HBC channels is affected by the electrode configuration. Based on the analysis of the simulated electric field distribution, an equivalent circuit model is proposed and the circuit parameters are extracted using the finite element method. The transmission capability along the human body is also studied. The simulated results using the numerical and circuit models coincide very well with the measurement, which demonstrates that the proposed circuit model can effectively interpret the operation mechanism of the capacitive HBC.
本文对电容式人体通信（HBC）进行了系统研究。HBC通道的测量是使用一种新型电池供电系统进行的，以消除巴伦、电缆和仪器的影响。为了验证测量结果，建立了一个包含整个HBC系统的数值模型。此外，结果表明HBC通道的阻抗和路径增益带宽均受电极配置的影响。基于对模拟电场分布的分析，提出了一个等效电路模型，并使用有限元方法提取了电路参数。还研究了沿人体的传输能力。使用数值模型和电路模型的模拟结果与测量结果非常吻合，这表明所提出的电路模型能够有效地解释电容式HBC的运行机制。
