The contribution of this study is to develop a miniaturised substrate integrated waveguide (SIW) cavity resonator with two evanescent-mode resonances. The circuit area of the developed dual-frequency SIW cavity is only 9.2% that of its conventional SIW cavity counterpart. A dual-band filter is implemented from using two miniaturised SIW cavity resonators. The two-passband frequencies can be independently controlled. Two transmission zeros are created by the two sides of each passband for enhancing the signal selectivity. A diplexer is also designed from using the proposed SIW cavities. A dual-band filter and a diplexer are built for experimental verification. Agreements between measured and simulated data are observed. To the best of the authors' knowledge, the designed dual-band filter and diplexer have achieved the best circuit area efficiency in the categories of dual-band SIW cavity filters and diplexers.

中文翻译：

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双频带滤波器和双工器设计中的小型化基板集成波导腔

这项研究的贡献是开发一种具有两个e逝模谐振的小型化的衬底集成波导（SIW）腔谐振器。所开发的双频SIW腔的电路面积仅为其传统SIW腔对应物的9.2％。通过使用两个小型化的SIW腔谐振器来实现双频带滤波器。两个通带频率可以独立控制。每个通带的两侧会产生两个传输零，以增强信号的选择性。还使用建议的SIW腔来设计双工器。内置双频滤波器和双工器用于实验验证。观察到测量数据和模拟数据之间的一致性。据作者所知，