Spoof Surface Plasmon Polariton-Based Continuously Tunable Cutoff Frequency Filter
Spoof Surface Plasmon Polariton-Based Continuously Tunable Cutoff Frequency Filter
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DOI：
10.1109/lmwt.2023.3308609
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发表时间：
2023-10
期刊：
影响因子：
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通讯作者：
Hailong Yang;Yi Xiao;Xuping Li;Shanzhe Wang;Tuo Yang;Xueyan Song;Jing Bai;Jiewei Jiang
中科院分区：
文献类型：
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作者：
Hailong Yang;Yi Xiao;Xuping Li;Shanzhe Wang;Tuo Yang;Xueyan Song;Jing Bai;Jiewei Jiang
本文提出了一种连续可调谐的截止频率滤波器，它由p-i-n二极管和变容二极管加载的可调谐欺骗表面等离子体激元（SSPP）构成。该单元结构的色散行为可以通过用p-i-n二极管切换SSPP单元来控制，在6.51和7.68 GHz的两个截止频率处实现可重构性。为了实现更高的可调谐截止频率，提出了一种新的变容二极管和p-i-n二极管级联组合的单元结构。仿真和实测结果表明，通过控制偏置电压的大小，滤波器的截止频率可以在5.34 ~ 7.23GHz范围内连续调谐，相对可调谐带宽达到70.8%。
In this letter, a continuously tunable cutoff frequency filter is proposed, which is composed of tunable spoof surface plasmon polaritons (SSPPs) loaded with p-i-n diodes and varactor diodes. The dispersion behavior of the unit structure can be controlled by switching the SSPP unit with a p-i-n diode, accomplishing reconfigurability at two cutoff frequencies of 6.51 and 7.68 GHz. In order to realize more tunable cutoff frequencies, a new unit structure that can obtain a cascaded combination of varactor diodes and p-i-n diodes is presented. The simulated and measured results verify that the cutoff frequency of the filter can be tuned continuously from 5.34 to 7.23 GHz by controlling the magnitude of the biasing voltage, and the relative tunable bandwidth of the SSPP filter is up to 70.8%.