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Parka, Janusz
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Publications (7/7 displayed)
- 2022Active control of dielectric singularities in indium-tin-oxides hyperbolic metamaterialscitations
- 2022Active control of dielectric singularities in indium-tin-oxides hyperbolic metamaterialscitations
- 2013Microwave complex permittivity of voltage-tunable nematic liquid crystals measured in high resistivity silicon transducerscitations
- 2013Dielectric properties of highly anisotropic nematic liquid crystals for tunable microwave componentscitations
- 2011Silver-Gelatine Metal-Dielectric Composites Made From Developed X-Ray Filmscitations
- 2011Experimental study of thermally controlled metamaterial containing a liquid crystal layer at microwave frequenciescitations
- 2007Measurements of anisotropic complex permittivity of liquid crystals at microwave frequenciescitations
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article
Dielectric properties of highly anisotropic nematic liquid crystals for tunable microwave components
Abstract
In this Letter, we report on measurements of the complex permittivity of highly anisotropic nematicliquid crystals at microwave frequencies as a function of the AC bias voltage. Permittivitymeasurements have been performed by the split post dielectric resonator technique. The experimentshave shown that when the AC bias voltage increases from 0 to 8 V, the real part of the permittivity ofthese liquid crystals changes by up to 28%. The tunability and the relatively low dielectric lossesobserved in these liquid crystal mixtures mean that they are ideal materials for the design of tunablemicrowave components.