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Memorias de investigación
Artículos en revistas:
Accurate and Efficient Modeling to Calculate the Voltage Dependence of Liquid Crystal Based Reflectarray Cells
Año:2014
Áreas de investigación
  • Tecnología electrónica y de las comunicaciones
Datos
Descripción
Two models which can predict the voltage dependent scattering from Liquid Crystal (LC) based reflectarray cells are presented. The validity of both numerical techniques is demonstrated using measured results in the frequency range 94 - 110 GHz. The most rigorous approach models, for each voltage, the inhomogeneous and anisotropic permittivity of the LC as a stratified media in the direction of the biasing field. This accounts for the different tilt angles of the LC molecules inside the cell calculated from the solution of the elastic problem. The other model is based on an effective homogeneous permittivity tensor that corresponds to the average tilt angle along the longitudinal direction for each biasing voltage. In this model, convergence problems associated with the longitudinal inhomogeneity are avoided and the computation efficiency is improved. Both models provide a correspondence between the reflection coefficient (losses and phase-shift) of the LC-based reflectarray cell and the value of biasing voltage, which can be used to design beam scanning reflectarrays. The accuracy and the efficiency of both models are also analyzed and discussed.
Internacional
Si
JCR del ISI
Si
Título de la revista
Ieee Transactions on Antennas And Propagation
ISSN
0018-926X
Factor de impacto JCR
2,459
Información de impacto
Datos JCR del año 2013
Volumen
52
DOI
Número de revista
Desde la página
2659
Hasta la página
2667
Mes
SIN MES
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Gerardo Perez Palomino (UPM)
  • Autor: Rafael Florencio Díaz (UPM)
  • Autor: Jose Antonio Encinar Garcinuño (UPM)
  • Autor: Mariano Barba Gea (UPM)
  • Autor: Raymond Dickie (Institute of Electronics, Communications and Information Technology, Queen¿s University Belfast)
  • Autor: Robert Cahill (Institute of Electronics, Communications and Information Technology, Queen¿s University Belfast)
  • Autor: Paul Baine (Institute of Electronics, Communications and Information Technology, Queen¿s University Belfast)
  • Autor: Michael Bain (Institute of Electronics, Communications and Information Technology, Queen¿s University Belfast)
  • Autor: Rafael Rodríguez Boix (Universidad de Sevilla)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Departamento: Señales, Sistemas y Radiocomunicaciones
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