A novel variable operating frequencies spoof surface plasmon polariton (SPP) filter is proposed in this letter. This proposed spoof SPP filter is adopted double-layers structure, the bandwidths of this proposed filter can be freely designed by loading corresponded upper layer. Dielectric layer and I-shape structure layer are utilized to design the upper layer of the proposed filter, then, wide-range continuous variable operating frequencies spoof SPP filter is achieved. The cut-off frequency of this filter can continuously shift from 2.40GHz to 11.35GHz when corresponding I-shape structure layers are designed. Both simulation and experiment results verify our design. This wide-range continuous variable operating frequencies spoof SPP filter presents the improvement and convenience in practice applications.

中文翻译：

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基于双层结构的变工作频率欺骗SPP滤波器


这封信中提出了一种新颖的可变工作频率欺骗表面等离子体激元（SPP）滤波器。该欺骗SPP滤波器采用双层结构，该滤波器的带宽可以通过加载相应的上层来自由设计。利用介电层和工字形结构层设计该滤波器的上层，从而实现了宽范围连续可变工作频率欺骗SPP滤波器。当设计相应的工字形结构层时，该滤波器的截止频率可以从2.40GHz连续变换到11.35GHz。仿真和实验结果验证了我们的设计。这种宽范围连续可变工作频率欺骗SPP滤波器在实际应用中呈现出改进和便利性。