Measurements of anisotropic complex permittivity of liquid crystals at microwave frequencies

被引：13
|
作者：
Parka, Janusz
Krupka, Jerzy
Dabrowski, Roman
Wosik, Jarek
机构：
[1] Inst Mikroelektron & Optoelektron Politechniki Wa, PL-00662 Warsaw, Poland
[2] Mil Univ Technol, Inst Phys Appl, PL-00908 Warsaw, Poland
[3] Mil Univ Technol, Inst Phys Chem, PL-00908 Warsaw, Poland
[4] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA
[5] Univ Houston, Texas Ctr Supercond, Houston, TX 77204 USA
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2007年 / 27卷 / 8-9期
关键词：
liquid crystals; electrical properties; functional applications;
D O I：
10.1016/j.jeurceramsoc.2006.11.015
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Recent interest in application of liquid crystals for tuning of microwave frequency range devices generated a need for better microwave characterization of these anisotropic and DC electric and magnetic fields sensitive materials. We report on measurements of the complex permittivity tensor of two liquid crystals and on determination of their DC electric field bias dependence. Measurements were carried out using a novel microwave cylindrical dielectric resonator technique which utilizes TE011 and TM011 modes. Liquid crystals are inserted into the inner hole in the dielectric resonator. Results of measurements have shown significant anisotropy in crystals dielectric properties and also allow estimates of tunability and tuning speed. The measurements showed some promises for liquid crystals to be used for tuning, but more characterization and technological work is needed. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2903 / 2905
页数：3
相关论文
共 50 条
  • [11] Complex Permittivity Measurements of Single-walled Carbon Nanotubes at Microwave Frequencies
    Dame, C.
    Xie, L-M.
    Zagozdzon-Wosik, W.
    Schmidt, H. K.
    Wosik, J.
    NANOTECH CONFERENCE & EXPO 2009, VOL 1, TECHNICAL PROCEEDINGS: NANOTECHNOLOGY 2009: FABRICATION, PARTICLES, CHARACTERIZATION, MEMS, ELECTRONICS AND PHOTONICS, 2009, : 304 - +
  • [12] MEASUREMENT OF COMPLEX PERMITTIVITY OF LIQUIDS AT MICROWAVE FREQUENCIES
    BARBENZA, GH
    JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS, 1969, 2 (10): : 871 - &
  • [13] Precise measurements of the permittivity of microwave absorbing materials at microwave frequencies
    Xiong, Gang
    Meng, Yifan
    Li, Jianzhuang
    Xiang, Feng
    JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2020, 31 (12) : 9904 - 9910
  • [14] Precise measurements of the permittivity of microwave absorbing materials at microwave frequencies
    Gang Xiong
    Yifan Meng
    Jianzhuang Li
    Feng Xiang
    Journal of Materials Science: Materials in Electronics, 2020, 31 : 9904 - 9910
  • [15] Measurement of complex permittivity of dielectric materials at microwave frequencies
    School of Electronic Engineering, Univ. of Electron. Sci. and Tech. of China, Chengdu 610054, China
    Dianzi Keji Diaxue Xuebao, 2007, 1 (44-46+69):
  • [16] Complex permittivity of sodium chloride solutions at microwave frequencies
    Peyman, A.
    Gabriel, C.
    Grant, E. H.
    BIOELECTROMAGNETICS, 2007, 28 (04) : 264 - 274
  • [17] Complex permittivity and permeability of ferrite ceramics at microwave frequencies
    Geyer, RG
    DIELECTRIC CERAMIC MATERIALS, 1999, 100 : 195 - 215
  • [18] A SYSTEM FOR MEASURING COMPLEX PERMITTIVITY AT MICROWAVE-FREQUENCIES
    HIGGS, AW
    JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS, 1986, 19 (12): : 1019 - 1025
  • [19] Complex permittivity of biological materials measurement at microwave frequencies
    Faktorova, D.
    MEASUREMENT 2007: 6TH INTERNATIONAL CONFERENCE ON MEASUREMENT, PROCEEDINGS, 2007, : 388 - 391
  • [20] MEASUREMENT OF COMPLEX PERMITTIVITY OF PAPER AT MICROWAVE-FREQUENCIES
    KUMAR, A
    SMITH, DG
    TAPPI, 1976, 59 (01): : 149 - 151
12345