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针对接收模式下电大尺寸的天线-天线罩系统电磁特性分析问题,提出了一种全波法和高频法结合的混合算法:积分方程/修正型表面积分+多层快速多极子(IE/MSI+MLFMA)方法.该方法将由高频方法 MSI得到的天线罩内场分布作为天线阵列的激励场,再利用基于体-面混合积分方程(VSIE)和MLFMA的快速全波分析方法精确计算天线阵;同时应用球谐函数展开、预处理技术、混合并行等技术进一步改进算法的计算效率.同传统的全波数值法相比,该方法在保证计算精度、满足工程需要的前提下,解决了求解计算时间长、计算效率低的问题,实现了对电大尺寸天线-天线罩系统的快速、高效仿真.
Aiming at the problem of electromagnetic characteristics analysis of antenna large size antenna system in receiving mode, a hybrid algorithm of full wave method and high frequency method is presented. Integral equation / modified surface integral + multilayered fast multipole (IE / MSI + MLFMA) method is proposed in this paper.The inner field distribution of the radome, which is obtained by the high-frequency method MSI, is used as the excitation field of the antenna array, and then the accurate full-wave analysis method based on VSIE and MLFMA is used to calculate the antenna At the same time, it also improves the computational efficiency of the algorithm by using the techniques of spherical harmonic expansion, preprocessing and hybrid parallelization, etc. Compared with the traditional full-wave numerical method, this method solves the problem of solving the problem The calculation time is long, the calculation efficiency is low, and the fast and efficient simulation of electric large size antenna-radome system is realized.