We propose a hybrid guided structure consisting of a rectangular waveguide loaded with channel-shaped and its complementary wedge-shaped metallic pillars that supports spoof plasmonic guided modes. The complementary structure is used in order to gain better control over tuning of the asymptotic frequency in the spoof plasmonic waveguide. As a proof of concept, a tunable microwave bandpass filter based on the proposed spoof plasmonic waveguide is fabricated and tested. Measurement and simulation results of the filter response are in excellent agreement with 14% bandwidth at the center frequency of 11 GHz and a maximum 0.7-dB insertion loss. The channel-shaped structure results in a passband frequency response with minimum ripple and the double-sided complementary pillars cause smaller bandwidth and more tunability.

中文翻译：

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基于混合欺骗等离子体波导的低成本带通滤波器


我们提出了一种混合引导结构，由加载通道形的矩形波导及其互补的楔形金属柱组成，支持欺骗等离子体引导模式。使用互补结构是为了更好地控制欺骗等离子体波导中渐近频率的调谐。作为概念证明，我们制造并测试了基于所提出的欺骗等离子体波导的可调谐微波带通滤波器。滤波器响应的测量和仿真结果与 11 GHz 中心频率处的 14% 带宽和最大 0.7 dB 插入损耗非常吻合。通道形结构可实现纹波最小的通带频率响应，而双面互补柱可实现更小的带宽和更高的可调谐性。