天线引向器阵列的准周期布局优化方法

Arrangement Optimization Method of Quasi-periodic Director Arrays

中文关键词: 参数化建模  布局优化  准周期阵列  耦合效应  旁瓣抑制

英文关键词: parametric modeling  arrangement optimization  quasi-periodic array  coupling effect  sidelobe suppression

中文摘要:

      准周期电磁金属阵列已被成功应用于机载旋罩天线等多种类型的电子器件中，用以提升电磁辐射性能。与周期阵列相比，准周期阵列不再受到周期性的限制，其设计自由度大幅增加，但也导致布局形式的描述参数规模更大且相互独立。同时，在准周期阵列的布局优化中，各个阵元间存在非规律耦合效应，耦合效应随着布局形式的变化而发生变化，该非规律变耦合效应需要在布局优化的迭代过程中严格考虑，以实现性能的精准设计。提出一种基于阵元几何移动、考虑变耦合效应的准周期电磁金属阵列布局优化方法，并将其用于求解天线引向器阵列的准周期布局。数值算例表明，通过引向器阵列中各个阵元尺寸和布置位置的协同优化，能够实现天线辐射波束性能的提升。

英文摘要:

      Quasi-periodic electromagnetic metal arrays have been successfully applied in various types of electronic devices, such as airborne rotating dome antennas, to enhance electromagnetic radiation performance. Compared to periodic arrays, quasi-periodic arrays are no longer constrained by periodicity, which significantly increases their design freedom. However, this also leads to a larger scale of descriptive parameters for the arrangement form, which are mutually independent. Furthermore, in the arrangement optimization of quasi-periodic arrays, there exists irregular coupling effects among individual elements, which vary with changes in the arrangement form. This irregular and varying coupling effect must be rigorously considered during the iterative process of arrangement optimization to achieve precise design of performance. This paper presents an arrangement optimization method based on the geometric movement of array elements and considering the variable coupling effect for quasi-periodic arrays, and applies it to solve the arrangement of quasi-periodic director arrays. Numerical examples demonstrate that through the collaborative optimization of the dimensions and positions of individual elements within the director array, the performance of the antenna radiation beam can be enhanced.