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分析设计大型阵列天线阵问题时,由于计算量巨大,很难实现全波方法如矩量法的整体仿真计算。而传统的方向图乘积定理无法考虑阵列单元间的耦合作用,所以无法保证计算的精度。针对这些问题,本文通过分析阵列单元间的耦合作用,提取出考虑耦合作用的单元因子作为阵列的本征解。在提取单元因子过程中,根据单元间耦合强度自适应选取需要考虑的耦合单元数。从而实现了在精度可控的前提下选取尽量少的单元数来减少计算量。分析共形阵列时,通过选择典型单元因子,根据阵面方向及位置进行旋转平移操作后加权组合出整个阵列的方向图。最后采用该方法分析了一个大型圆柱共形阵列天线的辐射特性。
When analyzing and designing the large array antenna array problem, it is very difficult to realize the whole simulation calculation of the full-wave method such as the moment method because of the huge amount of calculation. However, the traditional directional product product theorem can not consider the coupling between array elements, so the calculation accuracy can not be guaranteed. In response to these problems, this paper analyzes the coupling between array elements and extracts the element factors that consider the coupling as the intrinsic solution of the array. During unit factor extraction, the number of coupling units to be considered is adaptively selected according to the coupling strength between units. In order to achieve the accuracy of controllable under the premise of selecting as few units as possible to reduce the amount of computation. When analyzing the conformal array, the pattern of the entire array is weighted by selecting typical element factors, rotating and panning according to the direction and position of the array. Finally, this method is used to analyze the radiation characteristics of a large cylindrical conformal array antenna.