Null control in linear antenna arrays with ensemble differential evolution

This paper describes a synthesis method for null insertion in linear antenna array geometries by using newly proposed ensemble differential evolution (DE) algorithm. The given ensemble DE algorithm uses the advantages of several types of DE algorithms, and fuses them within a single algorithm. In the application, the algorithm searches for the minimization of the difference between the produced radiation pattern of the antenna array and desired radiation pattern, which contains null(s) at some specific aspect angle(s). Simulation results are illustrated for a Chebyshev radiation pattern and the effectiveness of the algorithm is validated. Besides, the results of ensemble DE algorithm are compared with bees algorithm, and the superiority of the proposed algorithm to bees algorithm is demonstrated.