Abstract
A tunable stepped-impedance resonator using liquid crystal is demonstrated. Two resonant frequencies at 3.367 and 7.198 GHz are realized and can be continuously tuned by external applied voltages. Continuous tunable ranges of 52 and 210 MHz have been achieved at a particularly low driving voltage of 14 V, which shows good agreement with the simulation results. The voltage-induced hysteresis phenomenon is also investigated. This device also has a low insertion loss of −2.9 and −4 dB for the two resonant frequencies and the return losses are less than −21.5 dB. This work provides a new protocol to realize a tunable frequency for communication systems.
摘要
提出一种液晶可调阶梯阻抗谐振器. 该谐振器分别在3.367 GHz和7.198 GHz处谐振, 这两个频点可通过对液晶层加载电压实现连续调节. 实验表明仅需施加14 V的外加电压, 即可实现52 MHz和210 MHz的调谐范围, 并与仿真结果吻合; 在此基础上, 研究了驱动过程中电压带来的迟滞效应. 该器件在两个频点处的插入损耗分别为−2.9 dB和−4 dB, 回波损耗均小于−21.5 dB. 该谐振器可应用于需要频率连续可调的各类通信系统中.
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Ruozhou LI and Jing YAN designed the research. Xingye FAN and Ruozhou LI conducted the investigation and processed the data. Xingye FAN and Jing YAN drafted the paper. Yuming FANG and Ying YU supervised the research and helped organize the paper. Ruozhou LI and Ying YU revised and finalized the paper.
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Xingye FAN, Ruozhou LI, Jing YAN, Yuming FANG, and Ying YU declare that they have no conflict of interest.
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Project supported by the National Natural Science Foundation of China (Nos. 61704090 and 11904177), the Natural Science Foundation of Jiangsu Province, China (Nos. BK20170908 and BK20170903), the Natural Science Foundation of the Higher Education Institutions of Jiangsu Province, China (No. 17KJA470005), the National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly Technology (No. KFJJ20180201), and NUPTSF (Nos. NY217123 and NY217124)
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Fan, X., Li, R., Yan, J. et al. Electrically tunable liquid crystal coplanar waveguide stepped-impedance resonator. Front Inform Technol Electron Eng 22, 1270–1276 (2021). https://doi.org/10.1631/FITEE.2000278
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DOI: https://doi.org/10.1631/FITEE.2000278