A High Efficiency Band-Pass Filter Based on CPW and Quasi-Spoof Surface Plasmon Polaritons

IEEE Access

Yanhui Liu¹  Xinhua Liang²  Xiaopeng Shen³  Jiahao Zhu⁴  Yuan Li⁴  Wen Jiang⁴  Lei Zhao⁵  Zhao-Min Chen⁵  Tie Jun Cui⁶  Jun Wang⁶ 

[1] AVIC Beijing Changcheng Aeronautical Measurement and Control Technology Research Institute, Beijing, China;Department of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, China;Department of Physics, China University of Mining and Technology, Xuzhou, China;Jiangsu Key Laboratory of Education Big Data Science and Engineering, School of Mathematics and Statistics, Jiangsu Normal University, Xuzhou, China;School of Information and Control Engineering, China University of Mining and Technology, Xuzhou, China;State Key Laboratory of Millimeter-Waves, School of Information Science and Engineering, Southeast University, Nanjing, China;

关键词: Band-pass filter;    coplanar waveguide;    quasi-spoof surface plasmon polaritons;   

DOI  :  10.1109/ACCESS.2019.2963062

来源: DOAJ

【 摘 要 】

A high efficiency and compact band-pass filter based on coplanar waveguide (CPW) is investigated in this paper, which lower and upper cut-off frequencies of the proposed filter can be tuned independently. In the proposed design, interdigital structure is used to filter the low frequency wave and a quasi-spoof surface plasmon polaritons (Q-SSPPs) structure is designed for tuning the higher cut-off frequency. The proposed Q-SSPPs structure contains only one cross-shaped element and keeps the similar properties of periodic SSPPs structure. The operating principle of the proposed design is explained by field distribution, dispersion curves, and equivalent circuits. The studies of vital parametric are carried out for better understanding the influences of the concerning parameters on the tunability. The simulated results indicate that the proposed design can obtain a wide bandwidth from 8.8 GHz to 17 GHz (about 63.6%) with high transmission efficiency (IS₁₁I <; -15 dB and IS₂₁I > -0.2 dB). A prototype of the proposed design is fabricated and the measured results show good agreement with the simulated ones.

【 授权许可】

Unknown