液晶介电常数在微波至太赫兹频段测试技术

›› 2017, Vol. 30 ›› Issue (4): 123-.

液晶介电常数在微波至太赫兹频段测试技术

葛忆 1，叶明旭 2，杨军 2，邓光晟 2，尹治平 2，桑磊 2

(1.合肥工业大学计算机与信息学院，安徽合肥 230009；2.合肥工业大学光电技术研究院，安徽合肥 230009)

出版日期:2017-04-15 发布日期:2017-04-11
作者简介:葛忆（1990- ），女，硕士研究生。研究方向：基于液晶的太赫兹反射移相器。杨军（1978- ），男，博士，副研究员，硕士生导师。研究方向：毫米波太赫兹波器件。

Techniques for the Measurement of Permittivity of Liquid Crystals at Millimeter-wave to Terahertz Frequencies

GE Yi 1，YE Mingxu 2，YANG Jun 2，DENG Guangcheng 2，YIN Zhiping 2，SANG Lei 2

(1. Computer and Information, Hefei University of Technology, Hefei 230009, China;
2. Optoelectronic Technology Research Institute, Hefei University of Technology, Hefei 230009, China)

Online:2017-04-15 Published:2017-04-11

摘要/Abstract

摘要：

基于液晶材料的器件成为毫米波及太赫兹波领域的重要方向之一，文中总结了毫米波太赫兹波液晶器件的研究进展，介绍了液晶移相器的基本原理及应用，分析了液晶介电常数的主要测试方法，如传输线/反射法、谐振腔法、自由空间法、时域法等，比较了不同方法的测试频率范围和优缺点，并给出了向列相液晶材料在微波毫米波及太赫兹波段的介电常数的主要测试结果。

关键词: 介电特性, 太赫兹, 移相器, 液晶材料, 介电常数

Abstract:

With the development of technology, devices based on liquid crystal materials have been increased considerably in the terahertz fields. This paper presents the research progress of terahertz(THz) liquid crystal devices, and the basic principles of liquid crystal phase shifter. In addition, several methods for the measurement of dielectric constants of liquid crystal are introduced, such as the transmission lines/reflection method, the resonant cavity method, the free-space method, the time domain method. The difference, involves range and relative merits, of those methods are compared. This overview also has revealed some experimental results of permittivity of the liquid crystal, which are measured at the different frequency ranges.

Key words: dielectric characterization, terahertz, phase shifter, liquid crystal material, permittivity

中图分类号:

TN710

葛忆 1，叶明旭 2，杨军 2，邓光晟 2，尹治平 2，桑磊 2. 液晶介电常数在微波至太赫兹频段测试技术[J]. , 2017, 30(4): 123-.

GE Yi 1，YE Mingxu 2，YANG Jun 2，DENG Guangcheng 2，YIN Zhiping 2，SANG Lei 2. Techniques for the Measurement of Permittivity of Liquid Crystals at Millimeter-wave to Terahertz Frequencies[J]. , 2017, 30(4): 123-.

[1]	王连胜,夏冬艳,付全红,丁学用,汪源. 基于电流变液的宽带可调超材料吸波体设计[J]. 电子科技, 2020, 33(12): 32-37.
[2]	刘杨, 李凯, 谭康伯. 典型风沙环境对电磁信号衰减的规律研究[J]. , 2018, 31(3): 81-.
[3]	张少丹,李琳. 基于线性移相误差的[WT《A》]N步移相算法[J]. , 2016, 29(2): 30-.
[4]	陈杰. 一种相位调制的微波移相实现新设计[J]. , 2014, 27(2): 75-.
[5]	罗玉文,王鹤磊,胡忠明. 太赫兹波在雷达领域的应用前景分析[J]. , 2014, 27(11): 167-.
[6]	王文闯, 张显, 曾庆丰, 李辉. Y2O3介电和振动性质的第一性原理研究[J]. , 2010, 23(7): 44-48.