摘要
为开发一种基于液晶材料的双偶极子结构反射式移相单元,文章根据液晶材料介电常数可调的特性,实现了在太赫兹频段的移相功能,并提出一种具有辅助电极的偏置电路结构用于减小液晶分子排列的不均匀性。仿真分析了单元反射波幅度和相位特性曲线,采用光刻技术加工液晶移相阵列和25 V偏置电压下在356 GHz测得240°相移,从而证明液晶移相单元在太赫兹频段具有电控可调移相能力。
A double dipole structures reflective phase shifter based on liquid crystal was proposed. The phase shifter exploited the tunable dielectric constant of liquid crystal, providing a tunable reflective phase shift of THz wave. A bias circuit with supplementary electrode structures was proposed to decrease the inhomogeneity of liquid crystal. The amplitude and phase characteristic curves of the reflective field were analyzed by simulation. A liquid crystal reflectarray was fabricated using photolithography process. Measured phase range of 240° was obtained at 356 GHz under a bias voltage of 25 V, proving the electronically phase shifting capability of liquid crystal phase shifter in sub-THz band.
作者
蔡成刚
杨军
杨阳
邓光晟
陆红波
尹治平
CAI Chenggang;YANG Jun;YANG Yang;DENG Guangsheng;LU Hongbo;YIN Zhiping(Academy of Photoelectric Technology, Hefei University of Technology, Hefei 230009, China)
出处
《合肥工业大学学报（自然科学版）》
CAS
北大核心
2019年第10期1357-1360,1440,共5页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目(51607050)
关键词
太赫兹
液晶
移相单元
反射阵列天线
相移
terahertz
liquid crystal
phase shifter
reflectarray antenna
phase shifting
