Abstract:

To solve the problem of synthesizing the uniformly excited sparse concentric ring arrays with the constraints, which include aperture and minimum elements spacing, an improved differential evolution algorithm is proposed. Firstly, a mapping function is set up to take individuals with unequal rings number into optimization. Secondly, the differential evolution is combined with the harmony search method, and the diversity of individuals has been improved by inserting random noise. Furthermore, dynamic model of crossover probability and mutation probability is established to improve the global optimal performance. Finally, the effectiveness of the proposed method is verified by simulations.