非均匀稀布线阵优化设计

Optimization Design of Sparse Linear Array

非均匀阵相比均匀布阵有众多优点,尤其是在超宽带扫描天线系统中,采用非均匀技术可以有效地降低副瓣并消除栅瓣,在天线阵面孔径一定的情况下,波束宽度基本不变,阵元数量减少,可以有效地降低系统成本。采用遗传算法对几种特定约束条件的稀布阵进行优化仿真验证,优化后副瓣和栅瓣压制效果良好。

Non-uniform antenna array has many advantages compared with uniform array.Especially in the ultra wideband sweep array system,non-uniform technology can effectively decrease the side lobe level(SLL)and erase grating lobes with fewer units which can reduce the system costs.Meanwhile the beam width is essentially unchanged while the aperture of the antenna array is fixed.The genetic algorithms are used to optimize a few sparse arrays under some special conditions.The optimized results show that the suppression of SLL and grating lobes is very effective.