平板裂缝天线子阵形变后的方向图分析

子阵方向图对平板裂缝天线的工作性能有着重要的影响。本文给出了常用的子阵设计方法,并针对可能出现的形变,提出了从单元位移和幅相的变化来分析子阵形变后的方向图的方法,分析结果表明:位移主要对主瓣宽度的影响较大,而幅相的变化主要对副瓣的影响较大。文中讨论、分析了子阵在不同形变情况下的方向图主瓣宽度、副瓣电平等性能,并给出了相应的理论结果和仿真结果。

Pattern Analysis for Deformed Subarray of Planar Slotted Antenna Array

The pattern characteristics of subarray have significant influence on the performance of a planar array antenna.This paper describes the design of subarray in common use at present and analyses pattern characteristics of subarray deformation from cell displacement and amplitude-phase variation.The analysis result shows:cell displacement will affect beam width;amplitude-phase usually affects sidelobe level.The beam width and sidelobe level of pattern of some deformed subarray forms are discussed and analysed,and some related theoretical results and simulation results are presented.This paper could offer some design reference for engineering application.