基于遗传算法的深空探测天线综合

Pattern synthesis of antenna in deep-space exploration with genetic algorithm

为了改善深空探测中共焦面阵列馈电抛物反射面天线的可视范围,提出一种基于遗传算法的扫描波束综合方法。基于物理光学法计算共焦面馈电阵中每个馈源照射反射面的次级远场方向图,利用遗传算法优化得到的权值对各次级方向图加权合成期望的波束。仿真和分析结果表明:提出的基于遗传算法的共焦面阵列馈电反射面方向图综合与传统共轭场匹配方法相比,可控制旁瓣电平,更精确综合出期望方向图,扩大深空探测天线的可视范围。

Genetic Algorithm（GA） was used to synthesize the patterns of the focal plane array feeding parabolic reflector antenna in deep-space exploration.Physical optics was used to compute the far field pattern of the antenna for excitation of each of the individual array elements in focal-plane array.Various scanning patterns were synthesized for deep-space exploration with this GA.The results show the proposed algorithm can control the sidelobe level,more precisely synthesize the expected pattern,and expand the visual range of deep space exploration antenna.