考虑互耦的多约束半波振子直线阵方向图综合

Pattern Synthesis of Linear Dipole Arrays with Multiple Constraints that Including the Mutual Coupling Effects

对于有阵列口径、单元数以及最小单元间距三重设计约束的半波振子直线阵,文中运用粒子群优化算法(PSO)通过调整阵元的间距实现了其低副瓣方向图综合,并用感应电动势法来计算阻抗矩阵,精确地计入了单元间的耦合。且通过引入新的粒子生成方法和改进传统PSO的优化操作进程,简化了优化模型,直接满足了最小阵元间距约束,减小了寻优的解空间,有效地降低了PSO的计算量,提高了优化速度。实例验证了该方法计入互耦进行方向图综合的准确性和改进后的PSO的高效性。

This paper presents a method for synthesizing low sidelobe level（SLL） pattern by optimizing the position of each dipole in the array with particle swarm optimization（PSO）.And here the dipole arrays have the design constraints of the array aperture,the number of elements and the minimum inter-element spacing.In order to consider the mutual coupling between elements,the element-by-element method is employed in the presented synthesis method.The elements of impedance matrix are self and mutual impedance of the dipoles computed by the induced EMF method.By introducing a new manner of the particles description and a modified optimization process for the traditional PSO,not only the size of the solution space of PSO is reduced,but also the infeasible solution during the optimization process is avoided.The simulated results validating the accuracy of the coupling model and high effectiveness of the modified PSO are also provided.