In this paper a new structure for bandstop waveguide-type resonators is introduced. Because of the similarity between the shape of this resonator and the Greek letter Φ, this resonator is named Φ-shaped resonator. These resonators are located in the cross section of the waveguide. The direction of the electromagnetic waves and the position of these resonators are studied to obtain a good excitation. Various resonances of these structures are determined. Moreover a circuit model is proposed and the parameters of this model are extracted. As a consequence an array of these resonators is used to design a bandstop filter. The results are simulated with CST Microwave Studio 2009 and a rejection level of almost 35 dB is achieved. Finally, these resonators are used as a solution for suppressing the spurious response of inductive post filters. In this case two methods are examined. In the first method an array of these resonators are cascaded with the total structure of the inductive post filter and in the second method these resonators are located in the spaces between the posts. The results verify the performance of these resonators for suppressing the spurious responses.
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机译：本文介绍了一种带阻波导型谐振器的新结构。由于该谐振器的形状与希腊字母Φ相似，因此将该谐振器称为Φ形谐振器。这些谐振器位于波导的横截面中。研究电磁波的方向和这些谐振器的位置以获得良好的激励。确定了这些结构的各种共振。此外，提出了电路模型并提取了该模型的参数。结果，这些谐振器的阵列被用来设计带阻滤波器。使用CST Microwave Studio 2009对结果进行了仿真，并获得了近35 dB的抑制水平。最后，这些谐振器用作抑制电感后置滤波器的寄生响应的解决方案。在这种情况下，将检查两种方法。在第一种方法中，将这些谐振器的阵列与感应式柱状滤波器的整体结构进行级联，而在第二种方法中，这些谐振器位于柱之间的空间中。结果证实了这些谐振器抑制寄生响应的性能。
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