并行FDTD分析机载微带天线阵列

Analysis of Airborne Microstrip Antenna Array Using Parallel FDTD

时域有限差分法(FDTD)在求解电大目标或者具有复杂结构的电磁问题时,内存消耗很大,所需的计算时间很长。应用基于MPI的并行FDTD可以极大地缩短计算时间。与其他算法相比,对于具有较高介电常数的微带天线而言,FDTD方法具有天然的计算优势。文中利用并行FDTD方法分析计算了一个大型微带天线阵的辐射特性,并与矩量法的结果进行对比,验证了算法的可靠性。同时分析计算了该阵列置于飞机平台上的辐射方向图受扰情况。数值结果表明,并行FDTD可以高效准确的分析电大尺寸目标的复杂电磁问题。本文的研究对机载天线阵列的电磁特性分析具有一定的指导意义。

To solve electromagnetic problems with electrically large size or complex structure, Finite-Difference Time-Domain(FDTD) method requires large memory and computational time. By using parallel FDTD based on MPI, the calculation time can be shortened greatly. Because of the bigger permittivity of microstrip antenna, FDTD has its advantage of simulation, compared to the other algorithm. In this paper, using parallel FDTD, the radiation characteristic of a large microstrip antenna array is analyzed and the results are compared with the ones from the method of moment(Mo M), and the disturbed situation of radiation pattern of the airborne microstrip antenna array is also analyzed. The numerical results indicate that the electrically large electromagnetic problems can be solved efficiently and accurately using the parallel FDTD. And the researches in the paper are useful for analyzing the electromagnetic characteristic of airborne antenna array.