Design and fabrication of a liquid crystal-based 94 GHz 360◦phase shifter for reflectarray antennas

作者：Mao, Rongxin; Xu, Junjie; Li, Xianping; Sun, Shuangyuan; Li, Xiangxiang; Yang, Jun^*; Yin, Zhiping; Deng, Guangsheng; Lu, Hongbo

来源：Progress in Electromagnetics Research Letters, 2021, 100: 145-150.

DOI：10.2528/PIERL21071301

• Applied bias voltage
• Liquid crystal layers
• Liquid crystal molecules
• Liquid-crystals
• Phase-shifters
• Quartz substrate
• Reflectarray antennas

In this work, we propose a liquid crystal (LC)-based double-dipole phase shifter. By manipulating the electric field, we change the resonant frequency and phase of the electromagnetic wave by deflecting the orientation of LC molecules. We made the LC-based device with a 30 ×30 array of two parallel unequal dipoles on a Quartz substrate. The substrate has an area and thickness of 4 ×4 cm2 and 480 ¶m, respectively. The experimental results show that the phase shift of 0◦–385.4◦is achieved at 94 GHz by changing the applied bias voltage on the LC layer from 0 V to 8.4 V. The phase shift is greater than 360◦in the range 91.75–94.85 GHz. When the LC molecules are most significantly affected by the electric field, the maximum precision of phase shift is 4.08◦with a bias voltage of 2 mV.

• 单位
  合肥工业大学