MoM-PO混合法分析带旋转体罩的天线

Analysis of antennas with the body of revolution radome using the hybrid MoM-PO method

针对电大尺寸天线-旋转体天线罩系统,提出了一种基于模式分解技术的MoM-PO混合分析方法.为了充分利用旋转体天线罩结构上的特性,通过模式分解技术对所分析的问题进行降维处理.在每个模式下,采用物理光学法确定天线罩壁上较平坦区域的等效电磁流分布,并将其嵌入矩量法矩阵方程中来减少待求量的数目.该方法降低了计算复杂度和内存需求量,能够对电大尺寸天线-旋转体罩系统进行快速准确的分析.

This paper presents a hybrid method of moments-physical optics （MoM PO） method based on the mode decomposition technique for the analysis of the electrically large antenna-body of revolution （BOR） radome system. For the BOR radome, due to its rotation-symmetric property, the mode decomposition technique can be used to reduce the dimension of the problem. For each mode, the equivalent electric and magnetic currents in the flat region of the radome are determined by physical optics （PO）, which are then integrated into the method of moments （MoM） equation to ellminate the number of unknowns. This method dramatically reduces the computation complexity and memory demand, and then it can analyze the large scale antenna-BOR radome system efficiently.