一种平面阵的非均匀子阵划分方法

大型相控阵雷达阵元数目众多,系统结构复杂,在实际中一般采用子阵结构,以减少通道数和设计成本。均匀划分的子阵级波束形成会产生栅瓣和栅零点;设计合理的非均匀划分方法可以有效的抑制栅瓣和栅零点,缺点是旁瓣较高和自适应性能下降。本文针对等幅平面阵提出了一种简单的非均匀划分子阵的方法,能够打乱子阵排列的周期性,有效降低了子阵级方向图的旁瓣。仿真验证了该方法的有效性。

A Non-Uniform Sub-array Partition Method for Planar Array

Large phased array antenna commonly consists of huge amount of elements,which results in complicated system architecture.Generally sub-array structure is used to reduce number of the channels and design cost.However grating lobes and grating nulls may be generated due to uniformly portioned sub-array configuration;proper non-uniform sub-array partition method could suppress grating lobes and grating nulls effectively,but its drawback is high side-lobe level and low adaptability.A simple non-uniform portioned sub-array configuration is proposed for planar array,it can break periodicity of sub-array arrangement,therefore side-lobe level of the sub-array pattern can be reduced effectively.Simulation results proved the validity of the proposed method.