有耗分层媒质中生命信号的传输特性

Propagation characteristic of vital signals in lossy layered media

目的 频率域上研究生命信号在分层媒质中的传输特性 .方法 利用电磁波传输理论与计算机仿真相结合 ,对有耗分层媒质反射系数、透射系数、介质损耗系数、介质界面传输系数等传输特性在整个复频域内特性的分析与比较 ,分析生命信号在有耗层状媒质中传输的频率特性 .结果 给出了生命信号 (载波为毫米波段 )在其中传输时场强振幅损耗、界面传输系数与载波频率、媒质分层厚度之间的关系 ,得出各介质参数及发射频率与传输特性的关系 ,理论分析与计算结果一致 .结论 在同一种有耗媒质中 ,在一定范围内 ,频率越高 ,信号振幅衰减越大 ,传输的距离越近 。

AIM To study the propagation characteristic of vital signals in layered media. METHODS Combining the theory of propagation in the lossy layered media with the technology of computer simulation, the propagation characteristic was analyzed and compared, through which the vital signals propagation characteristic in layered media was analyzed. RESULTS Relationship about the media parameters and propagation characteristic was obtained. The theoretical analysis and the results of calculation were identical. CONCLUSION Attenuation of millimeter wave caused by lossy medium is nearly constant.