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首页> 外文期刊>International Journal of Microwave and Wireless Technologies >Substrate-integrated waveguide cross-coupled filters with mixed electric and magnetic coupling structure
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Substrate-integrated waveguide cross-coupled filters with mixed electric and magnetic coupling structure

机译：混合电磁耦合结构的基片集成波导交叉耦合滤波器

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摘要

This paper presents a substrate-integrated waveguide (SIW) mixed electric and magnetic coupling structure implemented on a single-layer substrate to create finite transmission zeros (TZs), which can be used to design microwave filters with higher frequency selectivity. Mixed coupling is realized by three slot-lines on the top metal plane combined with an iris-window between two adjacent SIW cavities. The electric and magnetic coupling can be separately controlled by adjusting the dimensions of the slot-lines and the width of the iris-window, and a controllable TZ below or above the passband can be produced. Furthermore, a detailed analysis of the mixed coupling structure is presented. To demonstrate the validity of the proposed structure, third- and fourth-order cross-coupled generalized Chebyshev bandpass filters are designed and fabricated using the standard printed circuit board process. The experimental results are in good agreement with the simulation results. The filters exhibit simple structure and good frequency selectivity.
机译：本文介绍了一种在单层基板上实现的基板集成波导（SIW）混合电和磁耦合结构，以创建有限的透射零点（TZ），可用于设计具有更高频率选择性的微波滤波器。混合耦合是通过在顶部金属平面上的三个缝隙线与两个相邻的SIW腔之间的虹膜窗口实现的。通过调节缝隙线的尺寸和虹膜窗口的宽度，可以分别控制电耦合和磁耦合，并且可以产生通带以下或上方的可控TZ。此外，对混合耦合结构进行了详细分析。为了证明所提出结构的有效性，使用标准印刷电路板工艺设计并制造了三阶和四阶交叉耦合广义切比雪夫带通滤波器。实验结果与仿真结果吻合良好。该滤波器具有简单的结构和良好的频率选择性。

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