Electronically Reconfigurable Liquid Crystal Based Mm-Wave Polarization Converter

Author

Doumanis, E. ; Goussetis, George ; Dickie, R. ; Cahill, Ronan ; Baine, P. ; Bain, M. ; Fusco, Vincent ; Encinar, J.A. ; Toso, G.

Author_Institution

Bell-Labs., Alcatel-Lucent, Dublin, Ireland

Volume

62

Issue

4

fYear

2014

fDate

Apr-14

Firstpage

2302

Lastpage

2307

Abstract

An electronically tunable reflection polarizer which exploits the dielectric anisotropy of nematic liquid crystals (LC) has been designed, fabricated and measured in a frequency band centered at 130 GHz. The phase agile polarizing mirror converts an incident slant 45° signal upon reflection to right hand circular (RHCP), orthogonal linear (-45 °) or left hand circular (LHCP) polarization depending on the value of the voltage biasing the LC mixture. In the experimental set-up this is achieved by applying a low frequency bias voltage of 0 V, 40 V and 89 V respectively, across the cavity containing the LC material.

Keywords

dielectric materials; millimetre wave frequency convertors; nematic liquid crystals; polarisation; bandwidth 130 GHz; dielectric anisotropy; electronically reconfigurable liquid crystal; left hand circular polarization; low frequency bias voltage; mm-wave polarization converter; nematic liquid crystals; orthogonal linear polarization; phase agile polarizing mirror; right hand circular polarization; tunable reflection polarizer; voltage 0 V; voltage 40 V; voltage 89 V; Cavity resonators; Dielectrics; Frequency measurement; Liquid crystals; Reflection; Reflection coefficient; Voltage measurement; Earth observation; imaging; interferometry; liquid crystals; mm-wave; polarimetric systems; polarizer; remote sensing; space communications; submm-wave; tunable;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2014.2302844

Filename

6725635