一种基于HFSS结合遗传算法进行阵列天线方向图优化的研究

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一种基于HFSS结合遗传算法进行阵列天线方向图优化的研究

作者:周鹏 秦三团

来源:《现代电子技术》2016年第09期

摘 要: 提出一种新的对阵列天线方向图进行优化的方法,即借助Ansoft HFSS软件进行单元天线阵仿真,提取出各单元单独馈电的电流数据或远场数据,利用遗传算法对提取出的电流数据实施优化,得出满足方向图要求的单元电流值和相位值。结果表明,基于HFSS建模的灵活性,该方法可方便进行任意特性天线阵列的方向图综合,优化时对提取出的数据只需进行简单的远场外推或叠加,因而具有极快的计算速度。区别于传统的单独用遗传算法进行优化的方法,该方法将工程软件Ansoft HFSS 和遗传算法相结合,有效地提高了天线阵综合时的计算精度和目标函数的计算效率,进而有效提高了方向图的优化效率。 关键词: 单元电流值; 电流相位值; 方向图; 遗传算法; 天线阵列 中图分类号: TN820.1+2?34 文献标识码: A 文章编号: 1004?373X(2016)09?0075?03

Abstract: A new method to optimize the array antenna directional pattern is proposed, in which the cell antenna array is simulated with Ansoft HFSS software to extract the current data or far?field data of each exclusive feed cell, and then the genetic algorithm (GA) is used to optimize the extracted current data to obtain the cell current value and phase value satisfying the requirement of directional pattern. The method can conveniently synthesize the antenna array directional pattern with arbitrary characteristics due to the flexible HFSS modeling, and only a simple far?field extrapolation or superposition for the extracted data is needed while optimizing, so it has fast calculation speed. Different from the traditional optimization method using GA only, the method combining engineering software Ansoft HFSS with GA can effectively improve the

computational accuracy of the antenna array synthesis, computational efficiency of the objective function, and the optimization efficiency of the directional pattern.

Keywords: cell current value; current phase value; directional pattern; genetic algorithm; antenna array 0 引 言

天线阵方向图[1]综合(优化)对天线阵应用尤为重要,根据实际问题的需要,常常采用三种综合手段:单元相对位置、单元馈电幅度、单元馈电相位同时改变;单元相对

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