In this paper, the analytical formulas of energy radiated by the linear element planar antenna array are derived based on the electromagnetic theory and grating equations respectively. The conclusions obtained from the numerical results include (1) the electromagnetic radiation problem of linear elements antenna array can be solved concisely by grating equation, (2) the maximum energy of bounded beam is proportional to the quartic of the element's number of antenna array, (3) the beam can be restrained within the expected range by adjusting the time-delay of feeding properly, and (4) the effective scanning angle range depends on the given half angle width.%由电磁场理论给出了线元天线阵列波束扫描的解析公式,并由该解析公式得到阵列天线波束扫描的数字结果,然后用光栅方程对所得数字结果作了理论分析,得到以下结论:(1)阵列天线扫描问题可以由光栅方程进行简洁分析;(2)波束能量极大值与阵列天线元数目的四次方成正比;(3)通过适当馈电时间延迟,可以控制波束扫描范围;(4)扫描的角范围依赖所给的半角度宽度要求.
展开▼
