共形球面阵建模及其旁瓣控制的研究

运用球面几何知识,根据孔径及最小阵元间距约束,提出了一种基于正二十面体球面三角剖分法的球面阵建模方法。应用遗传算法,针对新模型相对主瓣较高的旁瓣电平问题,以阵元位置标识向量为个体元素,进行孔径、阵元个数、最小间隔一定的稀疏优化处理。仿真结果表明,新模型在结构上实现了阵元的近似球面对称分布,运用遗传算法有效地优化了共形球面阵的旁瓣性能。

Research on modeling and side lobe controlling of conformal spherical arrays

Under the design constrains of the aperture and the minimum element spacing,a new spherical model is obtained from spherical triangle subdivision based on regular icosahedron with the help of spherical geometry knowledge.To resolve the problem of relatively high side lobe level in the new model,some elements in the spherical arrays are thinned utilizing genetic algorithm. The simulation result shows that the elements are approximately spherical symmetrical in the new model,and the side lobe characteristic of the conformal spherical arrays is effectively optimized by utilizing genetic algorithm.