摘要
电扫阵列以其波束方向可控、扫描灵活和增益高的优势,在相控阵天线中得到广泛的应用。由于阵因子是周期性函数,从而导致了栅瓣的出现。栅瓣的形成使得从栅瓣"看"到的目标与主瓣"看"到的目标易于混淆,导致目标位置模糊。在电扫阵列栅瓣数值特性的研究基础上,对14×14的相控阵天线进行Matlab仿真。通过采用相控阵天线捕获技术,并结合传统天伺系统的扫描方法,提出了一种合理的跟踪策略,有效地避免了栅瓣的不利影响。
The electronic scanned array is widely used in phased array antenna owing to its intrinsic advantages such as controllable beam direction,flexible scanning and high gain. However,as the array factor is periodic function,the grating lobe exists. The appearance of grating lobe results in confusion of target observed from grating lobe and that observed from main lobe and ambiguous target location. By studying ESA grating lobe numerical characteristics,the simulation based on Matlab is performed for a 14 × 14 phased array antenna. By using phased array antenna acquisition technology and scanning method of traditional antenna servo system,this paper presents a reasonable tracking strategy for effectively avoiding the adverse impact of grating lobe.
出处
《无线电工程》
2016年第2期72-75,共4页
Radio Engineering
关键词
相控阵
栅瓣
天伺系统
阵元
phased array
grating lobe
antenna servo system
array element
