In this paper, a design method of reconfigurable broadband bandpass filter, with the advantage of adjustable bandwidth, is proposed by fabricating a hybrid sharing waveguide which is consist of half mode substrate integrated waveguide (HMSIW) and spoof surface plasmon polarization (SSPP). By adding a U-shaped resonant unit and a container structure to the bandpass filter, then through the movement of the slide on U-shaped groove and the alteration of the medium parameters in the container, the lower cut-off frequency of HMSIW and upper cut-off frequency of SSPP can be independently controlled by the fine tuning of the structures easily without changing the filter parameters. A prototype sample is fabricated to demonstrate and confirm the validity of the proposed method. The measured largest passband ranges from 11.5 to 14.5 GHz with the relative bandwidth of 23% which can be adjusted within a certain scope. The design of reconfigurable filter is realizing by the combination of HMSIW–SSPP structure and the concept of tunable filter. The proposed method can be used to develop different broadband bandpass filters.

中文翻译：

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基于半模衬底集成波导和表面等离子体激元偏振结构的宽带可重构带通滤波器

在本文中，通过制造由半模衬底集成波导（HMSIW）和欺骗表面等离子体偏振（SSPP）组成的混合共享波导，提出了一种具有带宽可调优势的可重构宽带带通滤波器的设计方法。通过在带通滤波器上增加一个U形谐振单元和一个容器结构，然后通过U形槽上滑块的运动和容器中介质参数的改变，HMSIW的下截止频率和上SSPP 的截止频率可以通过结构的微调轻松独立控制，而无需改变滤波器参数。制造原型样品以证明和确认所提出方法的有效性。测得的最大通带范围为 11.5 至 14。5GHz，相对带宽23%，可在一定范围内调整。可重构滤波器的设计是通过结合HMSIW-SSPP结构和可调滤波器的概念来实现的。所提出的方法可用于开发不同的宽带带通滤波器。