MPSTD算法在波导分析中的应用

Application of Multidomain Pseudospectral Time-domain in Waveguide

研究了多域伪谱时域(MPSTD)算法应用于波导问题分析时的激励源设置,并在此基础上,采用MPSTD算法计算了波导截止频率和典型三维波导结构的S参数,计算结果与HFSS或FDTD的计算结果做了比较,数值仿真表明,将MPSTD算法应用于波导问题的分析,可实现对波导问题的精确建模,具有较高的计算效率和计算精度,波导问题的MPSTD分析拓展了MPSTD算法的应用领域,为复杂波导问题的精确求解提供了一种思路。

The design of excitation sources was presented and the characteristic of waveguide was analyzed with multi-domain pseudospectral time-domain （MPSTD）. The cut-off frequency of 2D waveguide and the S parameters of typical 3D waveguide model were calculated with the MPSTD. All numerical results were compared with the HFSS or the FDTD results, which display that the MPSTD is more accurate and efficient. This paper offers a scheme for analyzing the complex waveguide accurately, and extends the application field of MPSTD.