复杂环境中短波天线的MoM/FDTD混合法分析

Analysis of MoM/FDTD hybrid technique on shortwave antenna in complex environment

摘要:

利用电磁场数值计算方法中的矩量法/时域有限差分(MoM/FDTD)混合方法，分析了复杂环境中短波天线的电磁辐射性能，建立了短波双极天线的自由空间模型。采用矩量法和时域有限差分法相结合，对其模型进行仿真计算，并将计算结果和已有的文献进行比较，验证了混合方法计算结果的可行性、准确性。总结了该模型对短波天线远区场影响的有益经验，为改善短波天线性能提供了设计参考。

Abstract:

This paper adopts the Method of Moment/ Finite Difference Time Domain(MoM/FDTD) hybrid technique in computational electromagnetism for analyzing the problems of shortwave antenna in complex environment. The models of shortwave dipole antenna in free space and on the ground are built, and the numerical simulation of the models is programmed with the hybrid technique. The comparison between the computing result by the hybrid technique and the result in the reference demonstrates the validation of the technique. Some good experiences are presented for improving shortwave antenna.