Efficient analysis of dielectric radomes using multilevel fast multipole algorithm with CRWG basis

A full-wave analysis of the electromagnetic problem of a three-dimensional （3-D） antenna radiating through a 3-D dielectric radome is preserued. The problem is formulated using the Poggio-Miller-Chang-Harrington- Wu（PMCHW） approach for homogeneous dielectric objects and the electric field integral equation for conducting objects. The integral equations are discretized by the method of moment （MoM）, in which the conducting and dielectric surface/interfaces are represented by curvilinear triangular patches and the unknown equivalent electric and magnetic currents are expanded using curvilinear RWG basis functions. The resultant matrix equation is then solved by the multilevel fast multipole algorithm （MLFMA） and fast far-field approximation （FAFFA） is used to further accelerate the computation. The radiation patterns of dipole arrays in the presence of radomes are presented. The numerical results demonstrate the accuracy and versatility of this method.

基于远场叠加公式的箔条阵列雷达散射特性研究

针对大范围箔条阵列仿真过程中,存在计算量大,计算时间长等问题,提出利用远场叠加公式与多层快速多极子算法相结合的快速仿真分析方法,利用快速多极子法,完成小规模箔条阵列的精确建模和计算,并通过远场叠加法,快速得到大尺度箔条阵列的远场分布;分别构建坐标轴型箔条散射单元、米字型箔条散射单元,对比研究了不同结构的箔条散射特性;分析了远场叠加公式的计算精度,并基于远场叠加公式获得公里级箔条阵列的雷达散射特性。