摘要： 针对人体通信的信号传输机制和传输特性，建立多层组织结构的人体通信系统模型，采用时域有限差分法从电磁场与人体相互作用的角度对其进行探讨。仿真结果表明，在人体通信中，信号在人体表面的传播具有表面波的特征，电磁场在平行和垂直于人体表面的方向上具有不同的衰减常数，在0~1 000 MHz的频率范围内，500 MHz~600 MHz是最佳的人体通信频段，在收发器与人体表面相隔一定距离的情况下，同样可以获得较好的通信效果。

关键词: 多层结构组织模型, 时域有限差分, 表面波, 垂直极化, 衰减常数, 信号损耗

Abstract: Aiming at the signal transmission mechanism and characteristic of Human Body Communication(HBC), a more practical HBC system model is proposed and Finite Difference Time Domain(FDTD) is adopted to explore from the aspect of interaction between electromagnetic field and human body. Simulation results show that in HBC, signal transmission along the arm surface possesses the features of surface wave. Electromagnetic field has different attenuation constants in the direction parallel and normal to human body surface. It is noted that 500 MHz~600 MHz is the best communication frequency band for the human body transmission in the 0~ 1 000 MHz frequency range. Good communication can be achieved when transceiver is somewhat apart from human body surface.

Key words: multiple layer structure tissue model, Finite Difference Time Domain(FDTD), surface wave, vertical polarization, attenuation constant, loss of signal

中图分类号: 

• TP391