Title :
Nematic liquid crystals for reconfigurable millimeter wavelength antenna technology
Author :
Doumanis, E. ; Dickie, R. ; Baine, P. ; Perez-Palomino, Gerardo ; Cahill, Ronan ; Goussetis, George ; Encinar, Jose Antonio ; Barba, M. ; Christie, Samuel ; Mitchell, Neil ; Bain, M. ; Toso, G.
Author_Institution :
Inst. of Electron., Queen´s Univ. Belfast, Belfast, UK
Abstract :
Nematic liquid crystals (LC) offer the capability to electronically reconfigure their dielectric permittivity tensor by applying a low AC voltage. This feature can find pertinent applications in submm-wave antenna technology in developing reconfigurable devices. In this contribution we review recent developments for the dielectric characterization of nematic liquid crystal samples at mm wavelengths and describe their applications in reconfigurable reflectarray antenna and tunable linear to circular polarization reflectors. The paper describes the theoretical aspects which underpin the technology that is employed for the realization, packaging and testing.
Keywords :
millimetre wave antenna arrays; nematic liquid crystals; permittivity; polarisation; reflectarray antennas; submillimetre wave antennas; LC; circular polarization reflectors; dielectric permittivity tensor; mm wavelengths; nematic liquid crystals; reconfigurable millimeter wavelength antenna technology; reconfigurable reflectarray antenna; submm-wave antenna technology; tunable linear antenna; Antennas; Liquid crystals; Permittivity; Polarization; Substrates; Surface impedance; nematic liquid crystals; polariser; reflectarray; submm-wave;
Conference_Titel :
Antennas and Propagation (EuCAP), 2013 7th European Conference on
Conference_Location :
Gothenburg
Print_ISBN :
978-1-4673-2187-7
Electronic_ISBN :
978-88-907018-1-8
