等离子天线重构特性数值计算  

Numerical calculation on reconfiguration characteristics of plasma antenna

作　　者：朱安石[1] 陈自力[1] 刘晓倩[1] 甄云卉 

机构地区：[1]军械工程学院无人机工程系,河北石家庄050003 [2]河北省军区司令部,河北石家庄050011

出　　处：《系统工程与电子技术》2015年第3期515-522,共8页Systems Engineering and Electronics

基　　金：国防预研基金资助课题

摘　　要：针对等离子天线重构特性进行研究,将Boltzmann方程与Maxwell方程相结合,建立了等离子体与电磁波相互作用模型,应用时域有限差分法对模型进行了数值计算,仿真验证了模型的正确性。在此基础上,在二维柱坐标系下建立了同轴线馈电等离子天线重构模型,数值计算了等离子天线近场方向图,仿真分析了等离子体状态参数对远场方向图及等离天线阻抗特性的影响。研究结果表明,随着等离子体状态参数的改变,等离子天线的辐射特性也随之发生改变,具有一定的重构特性。The reconfiguration characteristic of plasma antennas is studied. Firstly, the model to describe the interaction between plasma and electromagnetic waves is established by combining the Boltzmann equation with Maxwell equations. This modei is calculated numerically by the finite difference time domain （FDTD） method and the correctness is validated. Secondly, the reconfiguration model of plasma antennas is established under the two dimensional cylindrical coordinate. Based on this model, the near field of plasma antennas is ob tained. Also, the effect of plasma parameters on the far field radiation pattern and the impedance characteristic are simulated and analyzed. Results show that the radiation characteristics of plasma antennas change with the transformation of plasma parameters. And plasma antennas have a certain reconfiguration characteristic.

关 键 词：时域有限差分法 等离子天线 数值计算 重构 

分 类 号：TN92[电子电信—通信与信息系统]