提出一种基于模拟退火算法的共享孔径多子阵交错分布方法, 该方法以波束频率不同为约束条件, 以天线阵列的栅格间距和阵元位置为优化变量, 两个子阵的峰值旁瓣电平为目标函数。首先, 约束阵元栅格间距, 设置最小间距和最大间距, 确定阵元位置分布后计算阵元的栅格距离, 然后利用模拟退火算法优化阵元栅格间距和阵元位置分布, 计算并保存目标函数值, 最终生成不同频率、不同指向的两个波束。仿真结果表明, 所提算法能有效地降低两个子阵的峰值旁瓣电平, 且形成的两个不同频率的波束方向图性能相似。

A technology of shared aperture with multiple interleaved sub-arrays based on simulated annealing algorithm was proposed.Different beam frequencies were taken as the constraint condition, the grid spacing of the antenna array and the position of the array element were used as the optimal variables, and the peak side lobe level of the two sub-arrays was used as the objective function.Firstly, the grid spacing of the array element was constrained by setting a minimum spacing and a maximum spacing.The grid distance of the array element was calculated after determining the distribution of the array elements.Then, the simulated annealing algorithm was used to optimize the grid spacing and distribution of the array elements, and the value of the objective function was calculated and preserved.Finally, two beams with different frequencies and orientations were generated.The simulation results show that the proposed algorithm can effectively reduce the peak side lobe level of the two sub-arrays, and the two beam patterns with different frequencies are similar in performance.