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平面结构波导本征值问题的二维时域差分分析 被引量:1

The Analysis of Planar Waveguide Eigenvalue by Using Two Dimensional FD—TD Method
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摘要 本文提出了一种求解平面结构波导本征值的普适的方法——二维时域差分法。所分析的对象是一种多层介质结构平面波导,其中介质可以是各向异性的,且在介质界面内可以设置导电薄片。与一般的时域差分法相比,这一方法的空间差分只在波导横截面二维腔内进行,从而不仅减少了计算内存,利于在PC机上运行,且避免了一般时域差分法中开放边界条件处理的困难,增加了数值稳定性。本方法具有频域分析的特点,又拥有时域差分的优点。其计算公式普适,通用性强,极易处理各向异性介质,介质分界面存在众多导电片的情况,用这一方法分析微带线其精度和谱域法相当。利用本方法首次得到了各向异性介质基片的主光轴和结构坐标不一致的情况下的微带线色散特性。 In this paper,a general method for the Planar waveguide eigenvalue problems,which is called 2—dimensional Finite—Difference—Time—Domain method, is presented. The analyzed waveguide can involve multilaies dieleetric which can be anisotropic,and there may have many thin conductors in the interface between dielectric. The difference with general FD—TD method is that only the cross section of waveguide is discretized here,so it is effecient and economical in both CPU tome and temporary storage. In addition,if need not treat the open boudary,so that the compute stability and accuracy are improved. The method has not only the feature of the analysis in spectral domain. bat also the advantages of FD—TD method. Its formulae are simple and general. It is easy to analyze the waveguide with anisotropic substrates as well as multi thin conductors. When it is used to compute the dispersion charcteristics of microstrip,the accuracy is almost the same as that of spectral Domain method. In the last,The dispersion characteristics of microstrip with optical axis of its anisotropic sabstrate has tilted an angle with the structure coordinate,are given.
机构地区 浙江大学
出处 《微波学报》 CSCD 北大核心 1992年第3期30-37,共8页 Journal of Microwaves
关键词 波导 本征值 时域 差分分析 Eigenvalue,FD—TD method, planar waveguide, Microwave & millimeter wave integration.
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参考文献3

  • 1Zhang X,IEEE Trans MTT,1988年,36卷,2期,263页
  • 2Yang Hungyu,IEEE Trans MTT,1987年,35卷,24页
  • 3张开明,计算物理学

同被引文献6

  • 1高本庆.时域有限差分析[M].北京:国防工业出版社,1995..
  • 2高本庆,时域有限差分法,1995年
  • 3郑国武,微波学报,1992年,8卷,3期,30~36页
  • 4黎滨洪,毫米波技术及其应用,1990年
  • 5杨铨让,微带线鳍线设计数据手册,1988年
  • 6廖承恩,微波技术基础,1984年

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