基于子阵级非周期的有限扫描阵列研究

Study on aperiodic limited scan array consisting of sub-arrays

对基于子阵级非周期的有限扫描阵列进行研究,采用数值仿真和遗传算法对基于不同子阵规模的非周期阵列进行优化设计,分析4×4和2×2两种子阵规模对接收多波束应用中伴随波束方向图的影响,研究表明子阵规模过大会引起伴随波束方向图的旁瓣抬升,通过减小子阵规模可以避免该问题,论证了设计的基于2×2子阵的非周期八角阵可应用于有限视场扫描相控阵中。

This paper presents the study on aperiodic limited scan array(LSA) consisting of sub-arrays. Both numerical simulation and genetic algorithm are employed to achieve the optimal configuration of aperiodic arrays. In multi-beam scenarios, the effect of sub-array size on the patterns of adjoint beams has been investigated by analyzing the performance of sub-arrays consisting of 4×4 and 2×2 elements respectively. It is revealed that a large sub-array size will result in unexpected deterioration of the side-lobe level. In view of this issue, a smaller sub-array size is preferred to its counterparts. Furthermore, an octagonal aperiodic array is proposed, and it is demonstrated that this array can be well applied in phased arrays with limited field of view.