星载赋形反射面数传天线优化设计

为了使星载赋形反射面数传天线的波束形状满足设计要求,应用Minimax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Minimax算法对优化变量进行调整来使获得理想的赋形波束。通过对一个X波段赋形反射面天线优化结果的分析及与基于几何光学原理综合算法所得结果的对比,表明此方法的有效性和优越性。数值仿真结果表明:该方法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。

Optimizition Design of Shaped Reflector Data Transmission Antenna on Satellite

To generate a far field pattern fulfilling the design requirements,an application of the Minimax method in the design of a shaped reflector data transmission antenna on satellite is presented.First,the initial shape of the middle transversal line is obtained based on geometric optics theory,then the Newton insert interpolation function is used to draw up it,finally the perfect contoured beam is obtained by adjusting the coefficients of the function through the Minimax method.To verify the validity and advantage of this method,the optimization results of a shaped reflector at X band are presented and compared with the results by geometric optics method.The numerical simulation results show that the gain is above the design requirements in all coverage areas.