Improvement of decay time in nematic-liquid-crystal-loaded coplanar-waveguide-type microwave phase shifter by polymer stabilizing method

Thanh Nguyen, Shuhei Umeno, Hiroki Higuchi, Hirotsugu Kikuchi, Hiroshi Moritake

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Polymer stabilization by UV light irradiation in nematic liquid crystals is proposed to improve the decay time of coplanar-waveguide-type microwave phase shifters. The effect of polymer concentration on the decay time of polymer-stabilized nematic liquid crystals is confirmed by a dielectric experiment on a liquid-crystal-sandwiched indium-tin-oxide (ITO) glass cell before loading into a coplanar-waveguide-type microwave phase shifter. The decay time, phase shift value, and insertion loss of microwave phase shifters with different polymer concentrations are measured. The decay time of polymer-stabilized nematic liquid crystals in the microwave phase shifter markedly decreases compared with that of pure nematic liquid crystals. It is confirmed that the use of polymer-stabilized nematic liquid crystals is effective to improve the response time of microwave phase shifters.

Original languageEnglish
Article number01AE08
JournalJapanese journal of applied physics
Volume53
Issue number1 PART 2
DOIs
Publication statusPublished - Feb 10 2014

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Nematic liquid crystals
Coplanar waveguides
Phase shifters
liquid crystals
Microwaves
waveguides
microwaves
polymers
decay
Polymers
ITO glass
Insertion losses
Phase shift
insertion loss
Ultraviolet radiation
indium oxides
Liquid crystals
tin oxides
phase shift
Stabilization

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Improvement of decay time in nematic-liquid-crystal-loaded coplanar-waveguide-type microwave phase shifter by polymer stabilizing method. / Nguyen, Thanh; Umeno, Shuhei; Higuchi, Hiroki; Kikuchi, Hirotsugu; Moritake, Hiroshi.

In: Japanese journal of applied physics, Vol. 53, No. 1 PART 2, 01AE08, 10.02.2014.

Research output: Contribution to journalArticle

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