Improvement of an inverted microstrip line-based microwave tunable phase-shifter using liquid crystal

Author

Martin, Noham ; Laurent, Paul ; Prigent, Gaätan ; Gelin, Philippe ; Huret, Fabrice

Author_Institution

LEST, UBO, Brest, France

Volume

3

fYear

2003

fDate

7-9 Oct. 2003

Firstpage

1417

Abstract

This paper deals with the study of electrically tunable phase-shifters based on the use of liquid crystals. First, the dielectric characterization of the commercial liquid crystal involved in our investigations allowed us to determine its dielectric anisotropy. Secondly, two phase-shifter configurations were studied. Both structures propose inverted microstrip line with coplanar accesses, but they are based on a different design of the transmission line. The measurements carried out with the first one evidenced an efficient phase shift. The second one showed considerable improvement in performances.

Keywords

coplanar transmission lines; liquid crystals; microstrip lines; microwave phase shifters; permittivity; telecommunication transmission lines; dielectric anisotropy; dielectric properties; electrically tunable phase-shifters; liquid crystal; microstrip line; microwave tunable phase-shifter; transmission line; Anisotropic magnetoresistance; Dielectric liquids; Dielectric materials; Frequency; Liquid crystal displays; Liquid crystals; Magnetic materials; Microstrip; Permittivity; Tunable circuits and devices;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2003. 33rd European

Print_ISBN

1-58053-834-7

Type

conf

DOI

10.1109/EUMC.2003.1262925

Filename

1262925