一种非对称单元结构的双陷波滤波器设计
Design of a Double Notch Filter Design with Asymmetric Element Structure

本文介绍了一种基于人工表面等离激元(Spoof surface plasmon polaritons, SSPPs)的非对称单元结构双陷波滤波器。为了突破传统SSPPs对称结构工作频段单一的局限性，我们从矩形谐振环单元结构入手，将其从中间一分为二，并对左右两部分进行独立设计，使其成非对称结构。并对该结构进行仿真分析，仿真结果表明，该结构的滤波器在8.3 GHz和10.2 GHz处具有双陷波特性，其最大抑制深度约为-65dB，三个通带内的回波损耗平均值低于？10 dB。相较于传统对称结构，滤波选择性更加灵活。
This article introduces an asymmetric unit structure double notch filter on Spoof surface plasmon polaritons. In order to break through the limitations of traditional SSPPs with a single operating frequency band, we start with the rectangular resonant ring unit structure, divide it in half from the middle, and independently design the left and right parts to make it an asymmetric structure. And simulation analysis was conducted on the structure, and the simulation results showed that the filter of the structure has double notch characteristics at 8.3 GHz and 10.2 GHz, with a maximum suppression depth of about ？65 dB, and the average return loss within the three passbands is less than ？10 dB. Compared to traditional symmetric structures, filtering selectivity is more flexible.