旋转环境下电磁波传播特性及模型研究

Facing the demand for the parameter acquisition of rotating components by wireless transmission, the lack of research on the electromagnetic wave propagantion characteristics and models in rotating environments is a problem. In this project, the parameters of the rotating radius, the rotating velocity, the linear velocity, the rotation angle, the distance, etc. will be defined. The mathematical formulation of wave propagation between the transmitting antenna and the receiving antenna in time-dependent rotating motion is derived. The Doppler frequency shift and the electromagnetic wave polarization characteristics in rotating environments will be studied. By comprehensively considering the factors of the rotating radius,the rotating velocity, the linear velocity, the rotation angle, the Doppler frequency shift,the antenna polarization, environment, etc., the free space propagation model, the two-ray propagation model and the multipath propagation model in rotating environments will be established. The study on the models not only provides a strong theoretical support for the research of wireless data transmission techniques in rotating environments, but also has significant application value for developing and optimizing high-performance wireless monitoring systems in rotating environments.

针对通过无线电方式对旋转部件上的参数进行监测的应用需求，以及旋转环境下电磁波传播特性及模型研究缺乏的问题，本项目拟给出旋转半径、旋转角速度、旋转线速度、旋转角度以及距离等参数的定义，建立旋转环境下收发天线之间任一时刻的时空关系式，研究旋转环境下电磁波传播多普勒特性及极化特性，综合考虑旋转半径、旋转角速度、旋转线速度、旋转角度、工作频率、多普勒频移、天线极化方式、周围环境等因素，建立旋转环境下自由空间传播模型、双线传播模型及多径传播模型。研究结果可用于旋转环境下无线数据传输技术研究，对于发展和优化旋转环境下无线电监测系统具有很强的应用价值。

针对通过无线电方式对旋转部件上的参数进行监测的应用需求，以及旋转环境下电磁波传播特性及模型研究缺乏的问题，本项目给出了旋转半径、旋转角速度、旋转线速度、旋转角度以及距离等参数的定义，推导出了旋转环境下收发天线之间任一时刻的时空关系式，研究了旋转环境下电磁波传播多普勒特性及极化特性；综合考虑旋转半径、旋转角速度、旋转线速度、旋转角度、工作频率、多普勒频移、天线极化方式、周围环境等因素，建立了旋转环境下自由空间传播模型、双线传播模型以及绕射传播模型，并进行了计算机仿真与分析；最后，构建了旋转环境下自由空间传播模型、双线传播模型以及绕射传播模型测试台架，通过外场实验验证了各传播模型的正确性。研究结果可用于旋转环境下无线数据传输技术研究，对于发展和优化旋转环境下无线电监测系统具有很强的应用价值。