摘要波管是微波/毫米波电真空器件中最重要的器件之一，它具有高功率、高增益、高效率、宽频带等优点，在通信、雷达、电子对抗等领域中得到了广泛的应用，是国家重大专项的核心电子器件。63690

　　第二章介绍了矢量有限元理论及任意结构、任意介质加载二维、三维本征模式计算。该章后部分介绍了有限元最常用的匹配手段各向异性介质完全匹配层及其相关理论。最后，本章详细介绍了求解激励问题的端口边界条件。

　　第三章分析了Helmholtz方程弱形式与端口模式展开结合求解任意结构端口微波网络S参数方案，并对在此理论基础下的Galerkin加权余量法、广义散射矩阵法及Jin-Fa Lee方法进行分析。本章最后还针对GSM方法进行了解析激励和数值激励的离散化工作。

　　第四章简要介绍了模型网格划分、节点编号及矩阵求解相关理论。

　　第五章对介质加载二维、三维本征值问题及S参数程序计算结果进行分析并利用HFSS计算结果对比验证算法正确性。在求解二维本征值问题过程中，论文计算了有耗、各向异性介质加载的任意结构波导模式传输系数、色散曲线和模式电场分布。由于三维本征值问题和二维本征值问题理论很近似，论文仅对槽结构及各向异性介质填充的谐振腔模型进行计算。对于S参数求解模块，论文采用广义散射矩阵法。该方法通过归一化电压和归一化电流直接求解出归一化的导纳矩阵，进而求解出微波网络的S参数矩阵。和其它采用模式展开的方法相比，GSM方法矩阵求解过程简单，且能直接求解出任意微波网络的S参数。通过结果对比发现，程序计算结果和HFSS计算非常接近。

　　第六对全文进行了概括性的总结，指出了本文的主要工作。同时给出了下一步研究工作的建议。

毕业论文关键词  S参数，有限元/模式展开，完全匹配层，广义散射矩阵

毕业论文外文摘要

Title   Study on finite element method analysis of waveguide structure parameters of S                                   

Abstract Microwave wave tub is one of the most important equipments,which is one kindof high power,high gain and broad-band microwave millimeter wave amplifiers

   Chapter II introduced the vector finite element method theory and the simulation ofthe arbitrary shaped waveguide filled with anisotropic dielectric and the calculation ofthe three-dimensional resonant cavity eigenvalue..Finally,this chapter described the wave port boundarycondition which is widely used in S parameter simulation.

   Chapter III analyzed the weak form of Helmholtz equation and the port modematch method in S parameter simulation which contains the Galerkin weighted residualmethod,the generalized scattering matrix method and the Jin-Fa Lee method.Latterparts of this chapter introduced the GSM formulation discretization. 

   Chapter IV briefly introduced meshing,edge labeling and matrix solving.

   Chapter V emphasized on the analysis of the results about the algorithms whichincludes two-dimension and three-dimension eigenvalue computation module and Sparameters computation module..In the S parameters computation module,generalized scattering matrix method was used.Through the computation of theormalized admittance matrix with the normalized voltage and the normalized current,the microwave network S-parameter matrix can be got easily.According to thecomparison with the calculation result from HFSS,the accuracy of such algorithmsmentioned in this paper has been verified.

   Chapter VI summarized and concluded the whole dissertation.Further researchissues and possible research directions were pointed out.