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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Parka, Janusz
in Cooperation with on an Cooperation-Score of 37%
Topics
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
Measurements of anisotropic complex permittivity of liquid crystals at microwave frequencies
Abstract
<p>Recent interest in application of liquid crystals for tuning of microwave frequency range devices generated a need for better microwave characterization of these anisotropic and DC electric and magnetic fields sensitive materials. We report on measurements of the complex permittivity tensor of two liquid crystals and on determination of their DC electric field bias dependence. Measurements were carried out using a novel microwave cylindrical dielectric resonator technique which utilizes TE<sub>011</sub> and TM<sub>011</sub> modes. Liquid crystals are inserted into the inner hole in the dielectric resonator. Results of measurements have shown significant anisotropy in crystals dielectric properties and also allow estimates of tunability and tuning speed. The measurements showed some promises for liquid crystals to be used for tuning, but more characterization and technological work is needed. © 2006 Elsevier Ltd. All rights reserved.</p>