Broad band electromagnetic characterization method of nematic liquid crystals using a coplanar waveguide

Author

Hinojosa, J.

Author_Institution

Departamento de Electron., Tecnologia de Computadoras y Proyectos, Univ. Politecnica de Cartagena, Spain

fYear

2005

Firstpage

449

Lastpage

452

Abstract

A broad band electromagnetic extraction method of the dielectric tensor for nematic liquid crystals, associated to a measuring cell, is presented. The dielectric tensor is computed from S-parameter measurements obtained at the input planes of a coplanar waveguide supporting the nematic liquid crystal to be characterized, which is used as measuring cell. The extraction method of the dielectric tensor is based on the propagation of the dominant mode in the measuring cell. It is fast and easy. It uses analytical relationships, which are presented in this paper. The simulations results have demonstrated the validity of this extraction method in the 1 GHz-40 GHz frequency range for the electromagnetic characterization of nematic liquid crystals.

Keywords

S-parameters; coplanar waveguides; dielectric function; dielectric materials; nematic liquid crystals; permittivity; 1 to 40 GHz; S-parameter measurements; broad band electromagnetic extraction method; coplanar waveguide; dielectric tensor; nematic liquid crystals; Coplanar waveguides; Dielectric liquids; Dielectric measurements; Electromagnetic measurements; Electromagnetic scattering; Electromagnetic waveguides; Liquid crystals; Liquid waveguides; Scattering parameters; Tensile stress;

fLanguage

English

Publisher

ieee

Conference_Titel

Dielectric Liquids, 2005. ICDL 2005. 2005 IEEE International Conference on

Print_ISBN

0-7803-8954-9

Type

conf

DOI

10.1109/ICDL.2005.1490122

Filename

1490122