Title :
Wideband unit-cell based on liquid crystals for reconfigurable reflectarray antennas in f-band
Author :
Perez-Palomino, G. ; Encinar, J.A. ; Barba, M. ; Dickie, R. ; Baine, P. ; Cahill, R. ; Florencio, R. ; Boix, R.R.
Author_Institution :
Dept. of Electromagn. & Circuit Theor., Univ. Politec. de Madrid, Madrid, Spain
Abstract :
A reconfigurable reflectarray-cell has been designed to provide a large tunable phase range in the frequency band 117-130 GHz. The unit-cell comprises three parallel dipoles printed on a quartz-wafer and a tunable liquid crystal (LC) placed on a cavity between the dipoles and a ground plane. The simulation results show a tunable phase-shift in a range larger than 300 degree for a 10% bandwidth and low sensitivity to the angle of incidence.
Keywords :
broadband antennas; dipole antennas; liquid crystals; millimetre wave antenna arrays; reflectarray antennas; F-band; frequency 117 GHz to 130 GHz; ground plane; parallel dipoles; quartz-wafer; reconfigurable reflectarray antennas; reconfigurable reflectarray-cell; tunable liquid crystal; tunable phase-shift; wideband unit-cell; Bandwidth; Cavity resonators; Educational institutions; Erbium; Liquid crystals; Loss measurement; Reflector antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4673-0461-0
DOI :
10.1109/APS.2012.6347987
