Numerical analysis of nematic liquid crystals as applied to tunable antennas

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2 Citations (Scopus)

Abstract

In the current work we examine the application of Nematic Liquid Crystals (N-LCs) to frequency-agile antennas. A patch antenna design with a liquid crystal base is proposed. N-LCs are anisotropic and their electrical properties are determined by the macroscopic orientation of their molecules (director tilt-angle). However, these depend on the applied electric field, which means that the electric properties of the N-LC base can be effectively controlled. The above described problem is governed by a coupled system of PDEs. It is solved iteratively using a finite-difference scheme with relaxation. Once the director field is obtained, the dielectric properties of the material are determined for each value of the bias voltage. The proposed antenna is then simulated using HFSS. The return loss and resonant frequency are computed for each of value of the applied voltage. It is shown that the antennas under consideration can be tuned using relatively low applied voltages. This demonstrates the potential of liquid crystal based antennas in frequency-agile antenna design.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
PublisherAmerican Institute of Physics Inc.
Pages444-451
Number of pages8
Volume1629
ISBN (Electronic)9780735412682
DOIs
Publication statusPublished - 2014
Event6th International Conference for Promoting the Application of Mathematics in Technical and Natural Sciences, AMiTaNS 2014 - Albena, Bulgaria
Duration: 26 Jun 20141 Jul 2014

Other

Other6th International Conference for Promoting the Application of Mathematics in Technical and Natural Sciences, AMiTaNS 2014
Country/TerritoryBulgaria
CityAlbena
Period26/06/141/07/14

Keywords

  • effective dielectric constant
  • finite differences
  • frequency-agile antennas
  • Nematic liquid crystals

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