摘要
介绍二次有限元法分析波导本征值问题的基本原理和计算过程,编制相应的程序,实例计算了矩形波导的截止波长,并与理论值进行比较,所获得的计算结果与相关文献中所报道的数据吻合较好,表明该方法的有效性和程序的正确性。而且在此基础上计算了几种背脊波导的截止波长,单模带宽,画出了波导的场结构。这些结果和计算数据将为背脊矩形波导器件的小型化提供指导,对工程设计具有一定的实用价值。
The paper describes the basic principle and computing process of quadric-FEM in analyzing waveguide eigenvalues.The cutoff wavelength of the rectangular waveguide is practically computed,its comparison with theoretical value also done,and it is found that the result is identical with the data reported in the relevant papers.These indicate that quadric – FEM is an effective approach.Based on this,the cut-off wave lengths of several ridged waveguides are computed,and the field patterns of these waveguides are plotted.These calculations and results are of certain practical values for the project design.
出处
《通信技术》
2012年第8期37-40,共4页
Communications Technology
关键词
二次有限元
高次模式
截止波长
单模带宽
quadric-FEM
high-order mode
cut-off wavelength
single-mode bandwidth
