Research Repository

Measurement of dielectric constants of nematic liquid crystals at mm-wave frequencies using patch resonator

Yazdanpanahi, M and Bulja, S and Mirshekar-Syahkal, D and James, R and Day, SE and Fernández, FA (2010) 'Measurement of dielectric constants of nematic liquid crystals at mm-wave frequencies using patch resonator.' IEEE Transactions on Instrumentation and Measurement, 59 (12). 3079 - 3085. ISSN 0018-9456

Full text not available from this repository.

Abstract

A new technique for the measurement of dielectric constants of nematic liquid-crystal (LC) materials at millimeter-wave frequencies is presented. The proposed method utilizes an electric field to align the LC molecules, therefore offering safety and enormous size reduction over the method using the magnetic field to achieve LC directors' orientation. The measurement device is planar and consists of a rectangular patch resonator with the LC cell directly beneath it. Two preconditioned surface preparations, corresponding to transverse and longitudinal rubbing of the patch surface and ground plane in contact with LC, are investigated. Using the same measurement device with the two preconditioned surfaces, the measurements of dielectric constants and dielectric constant anisotropy of a nematic LC commonly known as E7 are conducted, and the results are found to agree to within 1% while confirming earlier published data. © 2006 IEEE.

Item Type: Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science and Health > Computer Science and Electronic Engineering, School of
Depositing User: Jim Jamieson
Date Deposited: 05 Mar 2013 16:58
Last Modified: 23 Jan 2019 03:15
URI: http://repository.essex.ac.uk/id/eprint/5533

Actions (login required)

View Item View Item