顺序扫描阵列配置方法研究

A Study on Array Design Method for Scanning Array

对于超宽带稀疏阵列,均匀无冗余阵列具有低栅瓣水平和高方位向分辨率。阵列配置的目的是设计双程阵列,使其单程等效阵列是均匀无冗余的。文中主要配置顺序扫描阵列,证明了若阵元总数大于4,没有均匀无冗余阵列的配置方法。然后给出了一种非均匀阵列配置方法,分析了其方位向分辨率和栅瓣水平。理论与仿真表明,文中提出的方法比与其阵元总数相同的端发多收阵列的栅瓣低。最后,根据所需要的方位向分辨率和栅瓣水平配置了一种实际顺序扫描阵列。

For uhra-wideband sparse arrays, periodic and irredundant array has low grating lobe level and high azimuth resolution. Thus, the aim of array design is to design a two-way array whose one-way effective array is periodic and irredundant. Scanning array design is mainly discussed in this paper, and the conclusion that there is no design approach for the array with more than 4 elements such that its effective array is periodic and irredundant is draw. Then an aperiodic design method is proposed and its azimuth resolution and grating lobe level are analyzed. Theoretical computations and simulation results indicate that with the same number of elements, grating lobes of the proposed method are lower than those of the array with two transmitting elements placed on the ends of the receiving array. Finally, a scanning array is designed according to required azimuth resolution and grating lobe level.