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Accurate Modeling for Wideband Characterization of Nematic Liquid Crystals for Microwave Applications

James, R; Fernandez, FA; Day, SE; Bulja, S; Mirshekar-Syahkal, D; (2009) Accurate Modeling for Wideband Characterization of Nematic Liquid Crystals for Microwave Applications. IEEE T MICROW THEORY , 57 (12) 3293 - 3297. 10.1109/TMTT.2009.2033864.

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Abstract

Liquid crystals are attractive materials for use in millimeter-wave band communications devices due to their large birefringence and reconfigurability. However, characterizing these materials is challenging at these frequencies. This work describes the modeling tools that have been developed for the accurate analysis of the liquid crystal orientation and of the wave propagation through the inhomogeneous and anisotropic liquid crystal layer. It also shows how the modeling has been used in conjunction with experimental measurement to characterize liquid crystal materials over a wide frequency range.

Type: Article
Title: Accurate Modeling for Wideband Characterization of Nematic Liquid Crystals for Microwave Applications
DOI: 10.1109/TMTT.2009.2033864
Keywords: Liquid crystals, stripline, finite-element methods, millimeter-wave devices, ANISOTROPIC WAVE-GUIDES, PERMITTIVITY, ELEMENTS
UCL classification: UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering
URI: http://discovery.ucl.ac.uk/id/eprint/168749
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