基于平均相关能量增益的超宽带平面振子优化

摘要

Using mean effective correlated energy gain (MECG) as the measure parameter of a UWB antenna time-domain performance, and programming with Matlab and CST jointly, this paper applies the genetic algorithm(GA) to rebuild the shape of a UWB planar dipole antenna and achieve the optimal time-domain performance. The optimized antenna has an impedance bandwidth of 3.1 GHz- 10.6 GHz, basically meeting the requirements in operation bandwidth of UWB system. The simulated MECG of the new antenna increases by 0. 157, and the measured one increases by 0. 161. The results of both measure and simulation indicates that the optimized antenna has a good time-domain performance including pulse radiation and pulse fidelity.%选取平均有效相干能量增益（MECG）作为超宽带（UWB）天线时域特性的衡量参数，并引入遗传算法，采用CST与Matlab协同编程运算，对UWB平面振子天线的形状进行重构设计，实现了天线的时域特性的优化。优化后天线的阻抗带宽为3．1～10．6GHz，基本满足超宽带系统的工作带宽要求。天线的MECG仿真结果提高了约0．157，实测的MECG提高了约0．161．仿真和实测结果均表明：优化后天线的脉冲辐射和保真能力均达到了良好的效果，其时域性能获得了有效的改善。