Quarter‐mode cavity resonators in substrate integrated waveguide (SIW) technology represent a good solution for the design of compact filters. However, their advantage in terms of reduced footprint is counterbalanced by possible radiation leakage, which may jeopardize the overall performance. This article presents a systematic investigation of the different contributions of losses in quarter‐mode SIW (QMSIW) cavities, considering both the standard topology and modified configurations. General guidelines for the choice of the optimal dielectric permittivity and substrate thickness are derived. Experimental results of individual cavity resonators are presented to validate the simulations. Moreover, the design and the experimental verification of a four‐pole filter based on classical and modified QMSIW cavities are reported, to illustrate a possible strategy for performance improvement.

中文翻译：

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改进的四分之一模基底集成波导腔：性能研究和在滤波器中的应用

衬底集成波导（SIW）技术中的四分之一模腔谐振器代表了紧凑型滤波器设计的良好解决方案。但是，它们在减少占用空间方面的优势被可能的辐射泄漏所抵消，这可能会危害整体性能。本文介绍了对四分之一模式SIW（QMSIW）腔中损耗的不同贡献的系统研究，同时考虑了标准拓扑和修改后的配置。得出选择最佳介电常数和衬底厚度的一般准则。提出了单个空腔谐振器的实验结果以验证仿真。此外，还报道了基于经典和改进的QMSIW腔的四极滤波器的设计和实验验证，