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基于Boltzmann方程和天线理论建立了表面波激励等离子天线辐射方向图重构模型。研究了等离子天线的色散关系,仿真分析了等离子体密度对波矢量的影响以及折射率对等离子天线辐射方向图的影响。搭建了表面波激励等离子天线试验系统,采用旋转天线测量法对等离子天线阵的辐射方向图进行了测量。仿真及实验结果表明:等离子天线辐射方向图重构模型可以用于等离子天线方向图重构特性的研究与分析,表面波激励等离子天线能够在外界激励信号的控制下实现辐射方向图的动态重构。
Based on the Boltzmann equation and the antenna theory, a reconstruction model of the radiation pattern of the surface-wave excited plasma antenna is established. The dispersion relation of the plasma antenna was studied. The influence of the plasma density on the wave vector and the influence of the refractive index on the radiation pattern of the plasma antenna were simulated. A test system of the surface plasmon excitation plasma antenna is set up. The radiation pattern of the plasma antenna array is measured by rotating antenna measurement method. Simulation and experimental results show that the reconstruction model of the plasma antenna radiation pattern can be used for the research and analysis of the reconstruction characteristics of the plasma antenna pattern. The surface wave excitation plasma antenna can realize the dynamic reconstruction of the radiation pattern under the control of the external excitation signal .