中文说明：
本程序仿真了电子扫描阵列天线方向图，实现了不同参数情况下栅瓣现象、主瓣宽度和功率增益随扫描角变化情况
English Description：
The program simulates the pattern of scanning array antenna, and realizes the grating lobe phenomenon, main lobe width and power gain changing with scanning angle under different parameters