太赫兹科学与电子信息学报2017，Vol.15Issue(2)：187-191,5.DOI:10.11805/TKYDA201702.0187
太赫兹液晶反射阵列移相单元的设计与分析
Design and analysis of Liquid Crystal-based reflectarray phase shifting cells in THz band
摘要
Abstract
In order to make the high-gain antenna have a large phase shift and can work in the THz band, a reflectarray element based on Liquid Crystals(LC) is designed to operate in the frequency range from 270GHz to 390GHz. When the phases of reflectarray element are calculated with a constant value of the permittivity, the elements produce a dynamic phase range above 360oin 335-345GHz, and achieve the maximum 390o at 342GHz. Then, in order to reduce the influence of liquid crystal inhomogeneity on the phase shifting, an accurate model of liquid crystal-based reflectarray cells is established. The accurate modeling produces a dynamic phase range above 250oin 330-338GHz, and achieves the maximum 285o at 336GHz. Compared with the equivalent permittivity modeling, the accurate modeling has a maximum phase error of 105o, which cannot be ignored in the reconfigurable reflectarray antennas design.关键词
反射阵列/双偶极子/液晶/太赫兹/移相单元Key words
reflectarray/double dipole/Liquid Crystals(LC)/terahertz/phase shifting cells分类
信息技术与安全科学引用本文复制引用
葛忆,夏天雨,杨军,邓光晟,尹治平,桑磊..太赫兹液晶反射阵列移相单元的设计与分析[J].太赫兹科学与电子信息学报,2017,15(2):187-191,5.基金项目
国家自然科学基金资助项目(51607050) （51607050）
