六边形平面天线阵优化稀疏布阵研究  

Research on Thinning the Hexagonal Planar Antenna Array

作　　者：李东风[1] 龚中麟[1] 

机构地区：[1]北京大学电子学系,北京100871

出　　处：《电子学报》2002年第3期376-380,共5页Acta Electronica Sinica

摘　　要：本文首先对遗传算法进行改良 ,并精心设计了适应函数 ,以确保遗传算法快速收敛 ;然后 ,应用改良后的遗传算法对天线单元正三角形排列的六边形平面阵进行优化稀疏布阵处理 ,以改善其辐射特性 .本文还研究了优化稀疏阵的频率特性 ,并提出了仅对阵列天线外边缘部分进行优化稀疏处理以达到改善整个阵列天线辐射特性的方法 ,该方法具有优化区间小和计算量少等优点 ,为以改善性能和降低造价为目的的大型阵列天线优化稀疏处理提供了一条有效途径 .结果表明通过优化稀疏处理 ,六边形平面阵的辐射特性可以获得相当大的改善 ,天线阵的最大旁瓣电平降低了 7 5～ 9 4dB 。The concept of optimizing the field pattern of a given equally spaced array by thinning process represents a very challenging problem with considerable practical advantages.In this paper,a properly modified genetic algorithm (GA) is applied at the first time to design a low sidelobe hexagonal planar array by thinning process.A study of the frequency characteristics of the thinned hexagonal planar array is made,and a new method,which has less computational work and is especially useful for large antenna arrays,is proposed for performance improvement of antenna arrays by thinning partially the array.The results show that the performance of the hexagonal planar array could be greatly improved by thinning,the maximum relative sidelobe level was reduced by 7 5～9 4dB,and thinning partially the array could attain the same performance as that of fully thinning.

关 键 词：遗传算法 阵列天线 稀疏布阵 六边形平面天线 

分 类 号：TN82[电子电信—信息与通信工程]