在轨重构抛物面反射阵天线相位优化设计

摘要

To reshape the beam of paraboloidal reflectarray antenna on satellite,random round method is used to optimize the phase.Firstly,the optimization of discrete phase is transformed into continuous problem,and then the Minimax method is adopted to search the optimization result,finally this result is rounded to get the array phase.To illustrate the validity of this method,the numerical simulation results of a paraboloid reflectarray antenna at Ku-band is presented.The results show that the method can realize the control ability of the beam shape,improving the flexibility of the antenna on orbit greatly.%为了实现天线波束在轨重构,随机圆整法被应用于星载抛物面反射阵天线单元相位优化设计。在优化过程中,把离散相位优化问题连续化,用Minimax算法求其最优解,通过随机圆整来得到阵列单元的相位。为证明算法的有效性,以一个工作在Ku频段的抛物面反射阵列天线为例,对其单元相位进行了仿真优化。数值仿真结果表明：此算法不仅能够在服务区内产生点波束,而且能够产生满足特定指标要求的赋形波束,提高了天线波束的灵活性。