遗传算法在星载数传天线优化设计中的应用  

Application of Genetic Algorithm in Design of Data Transmission Antennas on Satellite

作　　者：张新刚[1] 吴刚[1] 钟鹰[1] 

机构地区：[1]中国空间技术研究院西安分院,西安710100

出　　处：《电讯技术》2011年第9期106-111,共6页Telecommunication Engineering

摘　　要：为使星载赋形反射面数传天线的增益满足指标要求,采用改进的实数编码遗传算法对其进行了优化设计。首先基于几何光学原理得到反射面中截线的初始形状,然后采用Newton插值函数对中截线进行拟合并把插值函数的系数作为优化变量,最终利用改进的遗传算法对优化变量进行调整来获得理想的赋形波束。为证明此方法的有效性,对一个X频段赋形反射面天线进行了优化设计,并与基于几何光学原理综合算法所得结果进行了对比。数值仿真结果表明:该方法不仅能够保证覆盖角域内任意一点的增益均高于设计指标要求,而且使天线在最大覆盖角度处的增益达到了7 dBi,提高了天线系统的性能。To make the gain meet the design requirements, the application of the improved real coded genetic algorithm（GA） in the design of a data transmission antenna on satellite is presented. Firstly, the initial shape of the middle transversal line is obtained based on the Geometry optics theory, and then the Newton interpolation function is used to fit it, finally the ideal contoured beam is obtained by adjusting the coefficients of the function through the improved GA. To verify the validity of this method, the optimization results of a shaped reflector at X band are presented and compared with the results by Geometry optics method. The numerical simulation results show that this method can not only ensure the gain in the coverage area higher than the design demands, but also make the gain in the maximum coverage angle reach 7 dBi, thus improving the performance of the antenna.

关 键 词：遥感卫星 数据传输 反射面天线 遗传算法 赋形波束 优化设计 

分 类 号：TN823.27[电子电信—信息与通信工程] TN820.88