隐身武器平台对其装备的相控阵天线提出了超低RCS的要求,对影响相控阵天线RCS的因素进行了分析,对缩减RCS的各种措施进行了讨论。针对优化外形布局来缩减相控阵天线RCS,文中提出了一种差分进化算法,该方法用一组多项式描述天线阵列的外形轮廓,用差分进化算法对多项式的系数进行优化。该方法的目标函数可以根据需要灵活设置,最终得到的阵列外形连续,适合工程应用。并给出了1000 阵元阵列的应用实例,对仿真结果进行了分析。

Phased-array antennas with very low RCS are needed for low-observable weapon platform. The main factors which affect the RCS of phased-array antennas are analyzed. An algorithm for optimization of configurations is proposed to reduce the antenna mode RCS. In this method, the configuration 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 configuration is continuous, the result of this method can be directly applied for engineering. A phased-array with 1000 antennas is optimized for low antenna-mode RCS, and the discussion of the results are given.

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