Equivalent Circuit Model Viewed From Receiver Side in Human Body Communication
Equivalent Circuit Model Viewed From Receiver Side in Human Body Communication
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DOI：
10.1109/tbcas.2019.2918323
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发表时间：
2019-05
影响因子：
5.1
通讯作者：
Y. Nishida;K. Sasaki;Kentaro Yamamoto;D. Muramatsu;F. Koshiji
中科院分区：
文献类型：
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作者：
Y. Nishida;K. Sasaki;Kentaro Yamamoto;D. Muramatsu;F. Koshiji
人体通信（HBC）是一种以人体作为传输路径一部分的信号传输方式。通过接收电极的输入信号可以建模为来自信号源的信号，信号源由等效信号源电压和输出阻抗组成。这些值是分析HBC传输特性和设计接收机前端电路的重要参数。本文建立了信号从人体上的发射器到手指触摸的离体接收器的等效电路模型。发射机的接地电极与人体接触。这是一个不同的配置相比，电容HBC配置，使地面电极漂浮。评估了接收信号电压与发射机电极之间的距离、接收机接地尺寸和发射机-接收机距离之间的关系。利用等效电路模型对结果进行了分析。发射器与接收器之间的距离和发射器电极之间的距离都与等效信号源电压独立相关。接收地尺寸与人体与接收地之间的电容耦合有关，与等效输出阻抗有关。
Human body communication (HBC) is a signal transmission method that uses the human body as a part of the transmission path. The incoming signal through the receiver electrode can be modeled as a signal from a signal source, which consists of the equivalent signal source voltage and output impedance. These values are important parameters for analyzing the transmission characteristics of HBC as well as for designing the front-end circuit of the receiver. In this paper, an equivalent circuit model of signal transmission from a transmitter on the human body to an off-body receiver touched by a finger was constructed. The ground electrode of the transmitter was in contact with the human body. This is a different configuration compared to capacitive HBC configurations that leave the ground electrode floating. The relationship between the received signal voltage and the distance between the transmitter's electrodes, the size of the receiver ground, and the transmitter–receiver distance were evaluated. Results were analyzed by using the equivalent circuit model. The transmitter–receiver distance and the distance between the transmitter's electrodes were both independently related to the equivalent signal source voltage. The receiver ground size which was related to the capacitive coupling between the receiver ground and the human body was related to the equivalent output impedance.