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天线阵列设计是合成孔径辐射计的一项关键技术。圆阵可以实现零冗余基线分布,具有结构简单、易于与平台共形等特点,是当前广泛关注和应用的合成孔径辐射计天线阵列形式之一。针对以u-v覆盖均匀程度最大化为目标的合成孔径圆阵优化问题,利用一个新的目标函数,提出了一种基于改进差分进化算法的优化方法.新的目标函数具有计算量小和u-v覆盖均匀程度衡量精度高的优点,并且改进的算法可以保持种群规模。典型的数值仿真结果给出了16~40个天线单元的优化圆阵排列,验证了本文方法的有效性。
Antenna array design is a key technology of synthetic aperture radiometers. Circular array can achieve zero redundant baseline distribution, has the characteristics of simple structure and easy conformality with the platform, and is currently one of the forms of the synthetic aperture radiometer antenna array which is widely concerned and applied. Aiming at optimization problems of synthetic aperture circular arrays with the goal of maximizing the uniformity of uv coverage, a new objective function is proposed to improve the method based on the improved differential evolution algorithm. The new objective function has the advantages of low computational complexity and uv coverage The advantages of high degree of accuracy measurement, and the improved algorithm can maintain the population size. The typical numerical simulation results show the optimal circular array of 16 ~ 40 antenna elements, which verifies the effectiveness of the proposed method.