大型稀布相控阵天线设计及其旁瓣电平研究

Design of Large Thinned Phased Array Antenna and Study on its Sidelobe Level

本文对大型稀布相控阵天线设计及其旁瓣电平进行了研究.在用适当随机法设计稀布阵天线并对三种孔径尺寸,三十种孔径参考幅度分布,九种稀布率,用大周期随机数计算了45000个辐射孔径单元稀布排列方案及其全空域立体波瓣后,首次揭示了一些有价值的结论.最后,用数学回归法给出了精度较高的旁瓣电平计算公式.

The design of large thinned phased array antenna and its sidelohe level are studied.Computations are made for 3 aperture sizes, 30 reference aperture amplitude distributions and 9 thinned rates with random number of long period. 45000 arrangements of elements over thinned apertures and their 3D patterns in full space are calculated. Some useful results are derived Finally, the mathematical regression method is used to obtain the formula for estimating the sidelobe level with high accuracy.