| 基于液晶材料的带宽可重构毫米波滤波器 |
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| 引用本文： | 傅子豪,王 振,刘宇鹏,李潇雨,蒋 迪,张天良.基于液晶材料的带宽可重构毫米波滤波器[J].太赫兹科学与电子信息学报,2020,18(1):95-98. |
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| 作者姓名： | 傅子豪 王 振 刘宇鹏 李潇雨 蒋 迪 张天良 |
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| 作者单位： | School of Aeronautics and Astronautics，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China,School of Information and Communication Engineering，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China,School of Information and Communication Engineering，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China,School of Information and Communication Engineering，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China,1.School of Information and Communication Engineering，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China;2.State Key Laboratory of Millimeter Waves，Southeast University，Nanjing Jiangsu 210096，China and School of Aeronautics and Astronautics，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China |
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| 基金项目： | 国家自然科学基金资助项目(61501091)；四川省科技支撑计划资助项目(2017GZ0312)；毫米波国家重点实验室开放课题(K201704) |
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| 摘 要： | 根据液晶材料在毫米波段良好的介电特性和调谐能力，设计了一款基于液晶材料的毫米波带宽可重构宽带带通滤波器。滤波器使用一个高通滤波器和一个低通滤波器级联实现带通效果；在低通部分加载液晶材料，通过调谐液晶材料的等效介电常数改变低通滤波器的响应频率，实现带宽的可重构。仿真结果表明，当调谐液晶介电常数从2.4变化到3.8时，滤波器的高频截止频率从52 GHz下降至48 GHz，相对带宽从84.9%变为78.3%。
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| 关 键 词： | 液晶调谐 带宽可重构 带通滤波器 毫米波 |
| 收稿时间： | 2018/11/19 0:00:00 |
| 修稿时间： | 2019/1/17 0:00:00 |
Bandwidth reconfigurable millimeter wave filter based on liquid crystal |
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| FU Zihao,WANG Zhen,LIU Yupeng,LI Xiaoyu,JIANG Di and ZHANG Tianliang.Bandwidth reconfigurable millimeter wave filter based on liquid crystal[J].Journal of Terahertz Science and Electronic Information Technology,2020,18(1):95-98. |
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| Authors: | FU Zihao WANG Zhen LIU Yupeng LI Xiaoyu JIANG Di and ZHANG Tianliang |
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| Abstract: | A millimeter-wave bandwidth reconfigurable broadband pass filter based on Liquid Crystal(LC) material is designed according to LC''s good dielectric properties and tuning ability in millimeter-wave band. The filter is composed of a high-pass filter and a low-pass filter to achieve the band-pass effect and loads liquid crystal materials in the low-pass part. Bandwidth reconfiguration is achieved by tuning the equivalent dielectric constant of liquid crystal materials to change the response frequency of low-pass filters. The simulation results show that when the dielectric constant of the tunable liquid crystal is from 2.4 to 3.8, the high cut-off frequency of the filter has decreased from 2 GHz to 48 GHz, the relative bandwidth has changed from 84.9% to 78.3%. |
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