Title :
Liquid-crystal-based reflectarray antenna with electronically switchable monopulse patterns
Author :
Hu, W. ; Ismail, M.Y. ; Cahill, R. ; Encinar, J.A. ; Fusco, V.F. ; Gamble, H.S. ; Linton, D. ; Dickie, R. ; Grant, N. ; Rea, S.P.
Author_Institution :
Queen´´s Univ. Belfast, Belfast
Abstract :
A printed reflectarray antenna, which generates a beam that can be electronically switched from a sum to a difference radiation pattern, is presented. This is achieved by applying a bias voltage of 20 V to one- half of the aperture, which is constructed above a 500 mum cavity containing liquid crystals. Simulated results are shown to be in good agreement with measurements at X-band.
Keywords :
antenna radiation patterns; liquid crystals; microstrip antenna arrays; X-band; difference radiation pattern; electronically switchable monopulse patterns; liquid-crystal-based reflectarray antenna; printed reflectarray antenna; voltage 20 V;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20071098
