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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。
Aiming at the demand of two-dimensional beam broadening of array antenna, a differential evolution algorithm is proposed in this paper. This method uses a set of polynomials to describe the phase distribution of the antenna elements in the array and uses the differential evolution algorithm to optimize the polynomial coefficients. The application example of two-dimensional beam broadening is given. The three-dimensional electromagnetic simulation results are used to verify. The objective function of the method can be flexibly set according to the needs. The resulting array has a continuous phase distribution, stable performance and can be directly applied to engineering.