Analysis of Waveguide Discontinuities with Complex Cross Section by a Hybrid Mode Matching/4-Component 2-D FDFD Method

ZHAO Wei; ZHAO Yong-jiu; QIANG Li; LIU Bing; QIN Hong-bo

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Analysis of Waveguide Discontinuities with Complex Cross Section by a Hybrid Mode Matching/4-Component 2-D FDFD Method

更新时间：2025-07-16

- Analysis of Waveguide Discontinuities with Complex Cross Section by a Hybrid Mode Matching/4-Component 2-D FDFD Method
- Acta Electronica Sinica Vol. 38, Issue 12, Pages: 2735-2739(2010)
- 作者机构：
  
  1. 南京航空航天大学信息科学与技术学院,江苏,南京,210016
  2. 东南大学毫米波国家重点实验室,江苏,南京,210096
  3. 西安电子科技大学机电工程学院,陕西,西安,710071
  4. 南京航空航天大学信息科学与技术学院江苏南京,210016
  5. 东南大学毫米波国家重点实验室江苏南京,210096
  6. 西安电子科技大学机电工程学院陕西西安,710071
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN814
- Published：2010
- 稿件说明：
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ZHAO Wei, ZHAO Yong-jiu, QIANG Li, et al. Analysis of Waveguide Discontinuities with Complex Cross Section by a Hybrid Mode Matching/4-Component 2-D FDFD Method[J]. Acta Electronica Sinica, 2010, 38(12): 2735-2739.
DOI：

ZHAO Wei, ZHAO Yong-jiu, QIANG Li, et al. Analysis of Waveguide Discontinuities with Complex Cross Section by a Hybrid Mode Matching/4-Component 2-D FDFD Method[J]. Acta Electronica Sinica, 2010, 38(12): 2735-2739. DOI：

摘要

模式匹配(Mode Matching

MM)法分析波导不连续性问题时

通常需要已知相移常数和模式函数的解析表达式

因此

局限于分析简单截面波导不连续性问题.本文采用四分量二维频域有限差分(2-D FDFD)法能够有效地解决复杂截面波导本征模问题

本征值和本征向量分别对应相移常数和模式函数离散值

求得本征解后再利用模式匹配法计算出波导阶梯的广义散射参数.最后

给出了矩形波导中单脊膜片和十字膜片实例

验证了混合算法的准确性和高效性.

Abstract

In analysis of waveguide discontinuities by the traditional mode matching (MM) method

the phase constant and the analytical expression of mode function must be required.This limitation makes the application of the method only suitable for waveguide discontinuities with simple boundary shapes.In order to determine the mode spectrum of complex shaped waveguide

an eigen equation is established using four-component two-dimension finite-difference frequency-domain (2-D FDFD) method.Phase constants and mode functions could be easily solved as eigen values and eigen vectors

respectively.Once the eigen problem was solved

the generalized scattering parameters can be calculated by the MM technique.Finally

demonstrations of a single-ridged iris and a cross-shaped iris are analyzed.The results show this hybrid method is correct and efficient.

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