机载天线辐射特性的并行FDTD分析

Analysis of radiation characters of airborne antennas with parallel FDTD

利用基于MPI的并行FDTD全波数值分析方法对机载天线辐射问题进行准确快速地分析。通过消息传递MPI平台和区域分割技术进行并行计算,实现了计算资源的扩展,可以对飞机和天线进行精确建模分析。根据网络法提出了FDTD应用于天线间隔离度的分析计算方法,避免了天线隔离度扫频计算的复杂性。数值结果表明该方法的正确性和有效性。以伊尔76飞机为例分析了机载超短波天线的方向图和隔离度。所用方法和分析结果可以作为飞机电磁兼容性设计的手段和依据。

A scheme is presented by applying parallel FDTD method based on MPI to analyze the radiation problems of the airborne antennas accurately and quickly, which is a full-wave numerical method. The computation space is divided into some sub-domains, then the computation resource is expanded by MP1 parallel platform and a divide-and-conquer approach. The isolation between antennas based on FDTD is computed for avoiding the complexity of sweeping frequency. Numerical results for the radiation patterns and isolation of the ultrashort wave airborne antennas of Eel 76 show that the method is correct and efficient, and may be useful for the EMC analysis and design of the airplane.