This paper studies the least redundant solutions of two - dimensional array system by using the simulated annealing algorithm . two ideal thinning solutions for the two - dimensional circle array were discussed intensively in this paper . one solution uses half - circle configuration with very much reduced number of elements and taking an image by rotating the array ; the other selects element positions around the full circle to provide a roughly uniform coverage in the spatial frequency domain 在一維天線陣設計的基礎上,本文利用模擬退火算法給出了兩種最小冗余二維圓環(huán)天線陣的結構設計方案,一種方案利用天線旋轉,在半圓周內稀疏天線;另一種方案通過將空間頻率采樣點的均勻分布作為優(yōu)化的約束條件,在全圓周上使天線單元分布達到最優(yōu)。