一种基于多种群遗传算法的唯相加权阵列波束展宽技术  

A Beam-broadening Technique for Arrays Based on Multiple Population Genetic Algorithm by Phase-only Weighting

作　　者：蔡振龙 高坤 韩彦中 苏龙阁[1] 崔艳明 CAI Zhenlong;GAO Kun;HAN Yanzhong;SU Longge;CUI Yanming(The 54th Research Institute of CETC,Shijiazhuang 050081,China;School of Physics and Optoelectronic Engineering,Xidian University,Xi'an 710071,China;The 1st Military Representative Office in Shijiazhuang,PLA Army Equipment Department,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]西安电子科技大学物理与光电工程学院,陕西西安710071 [3]陆军装备部驻石家庄地区第一军代室,河北石家庄050081

出　　处：《无线电工程》2023年第3期570-576,共7页Radio Engineering

基　　金：国家部委基金资助项目。

摘　　要：传统的阵列波束展宽技术需要对阵元施加复加权操作,实现起来相对复杂。提出了一种基于多种群遗传算法(Multiple Population Genetic Algorithm,MPGA)的唯相加权阵列波束展宽技术,并针对均匀直线阵列和扇形圆环阵列,结合其数学模型,分别设计出适配的适应度函数,通过MPGA对阵元内各个阵元的附加相位进行优化,经仿真实现了阵列波束展宽。结果表明,该方法可以在考虑天线阵列的副瓣电平及天线效率的同时,设计实现更宽的阵列波束,且收敛速度较快、稳健性较好,充分显示了MPGA在天线阵列设计中较好的应用前景。The traditional methods of array beam-broadening include controlling the complex weighting of array elements(both amplitude and phase).These methods are relatively complex to implement.A kind of beam-broadening technique by phase-only weighting based on Multiple Population Genetic Algorithm(MPGA)is presented.At the same time,propriety fitness functions fit for beam broadening are designed according to mathematical models of uniform linear array and fan-shaped ring array.With MPGA,the elements’additional phase is optimized to realize beam broadening of the array.Simulation results have shown that the method can obtain broader beam in consideration of side-lobe level and antenna efficiency with fast convergence and robustness.It is shown that MPGA has a good application prospect in design of antenna arrays.

关 键 词：多种群遗传算法 波束展宽 唯相加权 副瓣电平 均匀直线阵列 扇形圆环阵列 

分 类 号：TN958[电子电信—信号与信息处理]