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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >A Novel Technique for the Direct Determination of Multimode Equivalent Circuit Models for Substrate Integrated Waveguide Discontinuities
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A Novel Technique for the Direct Determination of Multimode Equivalent Circuit Models for Substrate Integrated Waveguide Discontinuities

机译：直接确定衬底集成波导不连续性的多模等效电路模型的新技术

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摘要

A novel technique is presented for the automatic, self-consistent and direct determination of wide-band lumped-element equivalent circuit models of substrate integrated waveguide discontinuities. This technique is based on the full-wave analysis of substrate integrated waveguide components by using the Boundary Integral-Resonant Mode Expansion method, which provides a generalized admittance matrix of the components in the form of a pole expansion in the frequency domain. This expression of the admittance matrix permits to directly identify the topology of a multimodal equivalent circuit and the values of its lumped elements, thus avoiding any initial guess or fitting procedure. The basic theory of the full-wave analysis method and the procedure for determining the equivalent circuit model are reported. The features of the proposed technique are detailed through the modeling of an iris-like discontinuity. Moreover, this technique is validated by modeling substrate integrated waveguide filters, whose frequency response is compared with numerical and experimental results. The proposed method can be adopted to obtain libraries of parametric models of substrate integrated waveguide discontinuities, which can be included in computer aided design tools. The multimodal parametric model of an iris-like discontinuity is presented and discussed.
机译：提出了一种新颖的技术，用于自动，自洽和直接确定衬底集成波导不连续点的宽带集总元件等效电路模型。该技术基于使用边界积分谐振模式扩展方法对衬底集成波导组件进行的全波分析，该方法以频域中极点扩展的形式提供了组件的广义导纳矩阵。导纳矩阵的这种表达式可以直接识别多峰等效电路的拓扑及其集总元件的值，从而避免了任何初始猜测或拟合过程。报告了全波分析方法的基本原理和确定等效电路模型的步骤。通过对类似虹膜的不连续性进行建模，详细介绍了所提出技术的功能。此外，该技术通过对集成有波导滤波器的基片进行建模来验证，该滤波器的频率响应与数值和实验结果进行了比较。可以采用提出的方法来获得衬底集成波导不连续性的参数模型库，该库可以包含在计算机辅助设计工具中。提出并讨论了虹膜状不连续性的多峰参数模型。

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