辅助天线配置对自适应旁瓣对消系统性能的影响

Effect of Allocation of Auxiliary Antenna on Performance of Adaptive Sidelobe Canceller

为了研究辅助天线配置方法对机载相控阵雷达中自适应旁瓣对消系统性能的影响,设计了独立阵元、子阵面和阵元组合等辅助天线配置方案。仿真实验结果表明,在大多数辅助天线配置方案下,对消系统性能都比较好,无明显差别。只有当辅助天线在同一行或同一列时,对消系统性能严重下降;采用单个阵元作为辅助天线比采用多个阵元组合成辅助天线的方法更具有优势,对消系统的干扰抑制效果也更好。因此,在机载相控阵雷达中,建议不要将某一行或某一列配置为辅助天线,尽可能采用单个阵元作为辅助天线。

The allocation approaches of auxiliary antenna based on the independent array ele-ments, sub-array region and array element combination are designed for studying the impact of allocation of auxiliary antenna on the performance of adaptive sidelobe canceller in air-borne phased array radar. Results show that the performance of cancellers are good and there are no obvious differences in most of the proposed allocation approaches. The performance of cancel-ler is seriously deteriorated when the auxiliary antenna are allocated in the same row or col-umn. The auxiliary antenna based on single array elements have better interference suppression effect than those based on multiple array element combination. Therefore, the auxiliary anten-na should he avoided allocating in one row or one column and he constructed using single array elements as many as possible.