基于差分进化算法的阵列天线二维波束展宽研究

A Study on 2D Beam-widening with Differential Evolution

针对阵列天线二维波束展宽的需求,文中提出了一种差分进化算法。该方法用一组多项式描述阵列中天线单元的相位分布,用差分进化算法对多项式的系数进行优化。给出了二维波束展宽应用实例,采用三维电磁仿真结果进行了验证。该方法的目标函数可以根据需要灵活设置,最终得到的阵列相位分布连续,性能稳定,可直接工程应用。

A differential evolution is proposed in this paper, which is used for 2-D beam-widening of phased array. In this method, the phase distribution of the array is described by a set of polynomials, and the coefficients of the polynomial are optimized with differential evolution. The objective function of the method can be flexibly arranged according to the need. Because of the phase distribution is continuous, the performance of the widening beam is stable. The result of this method can be directly applied for engineering. In this paper, a application of 2-D beam-widening is given, and the results are verified by 3D electromagnetic simulation.