Title :
Electronically tunable dielectric resonator reflectarray
Author :
Mahmoud, Ali ; Mitkees, Abdelazez A. ; Zainudeen, Saber H. ; Kishk, Ahmed A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, QC, Canada
Abstract :
An electronically tunable reflectarray of aperture coupled square dielectric resonator antenna (DRA) elements is designed with a 230 × 230 mm2 size. The DRA phase is controlled via a capacitive varactor. The results show that the beam scanning within ± 60° range can be realized. The reflectarray is center-fed by a linearly polarized pyramidal horn antenna. At 10.6 GHz, the antenna provides a 3-dB beamwidth of 6 degrees with a gain of 25.5 dB. The antenna bandwidth within 1.5 dB gain variation is found to be 9% with stable radiation patterns.
Keywords :
antenna radiation patterns; aperture-coupled antennas; dielectric resonator antennas; horn antennas; microwave antenna arrays; reflectarray antennas; varactors; DRA phase; antenna radiation patterns; aperture coupled square dielectric resonator antenna; beam scanning; capacitive varactor; electronically tunable reflectarray; frequency 10.6 GHz; linearly polarized pyramidal horn antenna; Apertures; Capacitance; Gain; Light emitting diodes; Reflector antennas; Substrates; Varactors; Aperture coupled DRA; Beam scanning; Reflectarray; Waveguide method;
Conference_Titel :
Antenna Technology and Applied Electromagnetics (ANTEM), 2014 16th International Symposium on
Conference_Location :
Victoria, BC
DOI :
10.1109/ANTEM.2014.6887717
