Compact and Narrow-Band Bandpass Filter Using Spoof Surface Plasmon Polaritons

被引：22

作者：

Liu, Leilei ^{[1
]}

Hu, Yangjun ^{[1
]}

Li, Ruo-Zhou ^{[1
]}

Zhang, Qingfeng ^{[2
]}

Zhu, Lei ^{[3
]}

机构：

[1] Nanjing Univ Posts & Telecommun, Natl & Local Joint Engn Lab RF Integrat & Microas, Inst Flexible Elect Future Technol, Nanjing 210003, Peoples R China

[2] Southern Univ Sci & Technol China, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

[3] Univ Macau, Macau, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2021年 / 33卷 / 13期

关键词：

Band-pass filters; Passband; Bandwidth; Microwave filters; Dispersion; Couplings; Optical filters; Spoof surface plasmon polariton (SSPP); bandpass filter; controllable central frequency and bandwidth; WAVE-GUIDE;

D O I：

10.1109/LPT.2021.3085580

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This letter presents a novel narrow-band bandpass spoof surface plasmon polarition (SSPP) filter, which has a controllable passband, good rejection, and a compact structure. It is composed of two end-extending SSPP transmission lines and a pair of L-shaped coupling branches. Both the bandwidth and the central frequency can be adjusted by changing the depth of the SSPP unit and the length of SSPP transmission line behind the coupling branches. The dispersion curves of the SSPP unit are analyzed, and the influences of some structural parameters are investigated. A SSPP band-pass filter is fabricated and measured based on the proposed method, showing a wide 3-dB fractional bandwidth of 11.2% centered at 6.25 GHz and an out-of-band rejection below -15 dB within 1-10 GHz. The measured result shows good agreement with the simulated one.

引用

页码：676 / 679

页数：4

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