This paper compares the expanded to the unexpanded in the performance of direction of arrival estimation at first,and then analyses the beam of different thinned ratio.

• 比较了该阵列扩展前和扩展后的测向性能,分析了阵列在不同稀疏比下的测向性能以及波束图,可以看出稀疏阵列的波束图的旁瓣明显降低了。