相控阵天线的互耦和近场校准

本文在分析相控阵天线近场特性的基础上,根据信号子空间的基本理论,结合模拟退火算法,提出了一种利用近场辅助源估计相控阵天线互耦系数的方法.大量的计算机仿真结果表明,本方法使用校准源少,校准源到天线阵距离近,算法稳健,即使在雷达工作、并且存在其它未知信号时,也能准确估计出天线阵的互耦系数.

A Hybrid Optimized Algorithm Based on Differential Evolution and Genetic Algorithm and Its Applications in Pattern Synthesis of Antenna Arrays

The pattern synthesis technique of adaptive arrays is one of the key technologies in smart antenna systems so that an efficient optimized algorithm is indispensable due to the complexity of the system.A hybrid optimized algorithm is proposed,which is based principally on the combination of the differential evolution theory and the genetic algorithm.In this algorithm the differential evolution operator is adopted as the main optimizing scheme while such techniques of the genetic algorithm,as crossover,mutation,etc,are employed.Therefore it is expected that advantages of both the differential evolution and the genetic algorithm are kept so that the hybrid model can optimize large scale,highly nonlinear problems well and improve the efficiency of the optimization process.Computer simulations show that the pattern synthesis of antenna arrays can be carried out with fast convergence and excellent stability by the model,even for complex cases.