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在机载阵列天线的分析过程中,采用单一种类的电磁算法通常难以对之高效求解。为了快速准确分析此类复杂电大目标的辐射和散射问题,基于区域分解的思想建立了一种多算法协同计算的统一架构。将复杂电磁问题划分为多个子区域,对于问题的不同子区域可以根据该区域内的材料、结构、馈源等特征来选择适合的数值方法进行计算。该协同计算框架将不同种类的算法隔离开来,不同区域之间统一采用等效面上的近场交换区域间的耦合作用,提高了算法协同的灵便性。各子区域内部可以采用并行计算、核外存储等技术来加快计算的过程,提高求解问题的规模。数值计算结果验证了该方法的有效性,同时采用并行核外高阶、低阶矩量法及多层快速多极子混合方法高效解决了机载微带天线阵的辐射特性分析问题。
In the analysis of airborne array antennas, using a single type of electromagnetic algorithm is often difficult to solve efficiently. In order to quickly and accurately analyze the radiation and scattering problems of such a complex TVU, a unified architecture of multi-algorithm collaborative computing is established based on the idea of region decomposition. Dividing a complex electromagnetic problem into multiple sub-regions can be solved by selecting suitable numerical methods for the different sub-regions of the problem according to the features of materials, structures and feeds in the region. The collaborative computing framework isolates different kinds of algorithms, and the coupling between near-field switching regions on the equivalent surface is adopted uniformly by different regions so as to improve the convenience of the algorithm coordination. Within each sub-region, parallel computing and extra-nuclear storage technologies can be used to speed up the calculation process and increase the scale of solving the problem. The numerical results verify the effectiveness of the proposed method. Meanwhile, the parallel extra-core high-order, low-order method of moments and multi-layer fast multipole hybrid approach are used to efficiently solve the problem of the radiation characteristics analysis of airborne microstrip antenna arrays.