Design and Fabrication of Reflective Phase Shifter for Two-Dimensional Terahertz Beam-Scanning Reflectarray  

作　　者：YANG Jun YIN Mingjun GAO Haoyu YIN Zhiping YE Yang DENG Guangsheng LU Hongbo 

机构地区：[1]Special Display and Imaging Technology Innovation Center of Anhui Province,Academy of Opto-electric Technology,Hefei University of Technology,Hefei 230009,China [2]Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing,Guilin University of Electronic Technology,Guilin 541004,China [3]Space Star Technology Co.,Ltd.,Beijing 100095,China

出　　处：《Chinese Journal of Electronics》2022年第3期581-588,共8页电子学报（英文版）

基　　金：supported by the Opening Project of Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing(GXKL06200207);the National Natural Science Foundation of China(61871171)。

摘　　要：A reflective phase shifter is proposed to realize the two-dimensional beam-scanning reflectarray.The reflectarray is composed of double-dipole resonant elements in which the phase shift is implemented by applying a driving voltage to the liquid crystal(LC). A 30 ×30 phase shifter sample is fabricated on a quartz substrate with a 480 μm thickness and a 4 cm × 4 cm area.According to the experimental results, 0 to 360° phase shift can be achieved within the bandwidth of 5 GHz. In order to accomplish two-dimensional beam-scanning and reduce the negative impact of driving lines on the reflectarray, a new LC driving method is developed. To verify the accuracy of the proposed approach, three samples of different driving line numbers are designed using the above-mentioned phase shifter, which all have achieved a0-360° phase shift in the bandwidth of 4 GHz. Considering the influence of LC anisotropy and inhomogeneity, an improved calculation result is obtained and compared with experimental data.

关 键 词：TERAHERTZ Liquid crystal REFLECTARRAY Phase shifter Driving method 

分 类 号：TN623[电子电信—电路与系统] O441.4[理学—电磁学]