FDTD法分析多连接波导的模式

A FDTD based Modal Analysis of the Multi connected Waveguides

采用时域有限差分法结合傅立叶变换方法，分析了非对称的混合波导和偏心圆波导的模式和场分布，得出了有工程实用价值的结果，为新型圆形横电磁波传输室和多连接波导的设计提供了理论基础。

The modes and field distrbution of unsymmetrical mixed waveguide and offset circular waveguide are analyzed by the combination of FDTD method and Discrete Flourier Transform (DFT).The results are compared with the literature to validate the method.The analysis shows that the cut off frequency of unsymmetrically mixed waveguide is higher than that of the symmetrically mixed waveguide.