Title :
Circularly polarized graphene based transmitarray for terahertz applications
Author :
Malhat, Hend A. ; Zainud-Deen, Saber H. ; Gaber, Shaymaa M.
Author_Institution :
Fac. of Electron. Eng., Menoufia Univ., Shebin El-Koom, Egypt
Abstract :
Circularly polarized graphene based transmitarray for terahertz applications is proposed. The characteristics of the graphene material is explained. The cell element of the transmitarray is made of square Quartz cell. Dual circular graphene rings are printed on both sides of the Quartz substrate. The graphene ring radius is varied to change the transmission coefficient phase and magnitude. The effect of the graphene mobility on the transmission coefficient is demonstrated. Transmitarray is composed of 9×9 unit cell elements. A circularly polarized circular horn is used to feed the transmitarray at f=6 THz. The left- and right-hand field components in the E-and H-plane are determined. The variation of the gain and the axial-ratio with the frequency are explained. The peak gain is 18.63 dB and 1-dB gain bandwidth is 6.8%. The transmitarray produces a circular polarization from 5.5 THz to 6.5 THz.
Keywords :
antenna arrays; graphene; horn antennas; submillimetre wave antennas; transmitting antennas; C; circularly polarized circular horn; circularly polarized graphene; dual circular graphene rings; frequency 5.5 THz to 6.5 THz; gain 1 dB; gain 18.63 dB; graphene mobility; graphene ring radius; left-hand field components; quartz substrate; right-hand field components; square quartz cell; terahertz applications; transmission coefficient magnitude; transmission coefficient phase; transmitarray; Arrays; Conductivity; Feeds; Gain; Graphene; Reflector antennas; Transmitting antennas;
Conference_Titel :
General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI
Conference_Location :
Beijing
DOI :
10.1109/URSIGASS.2014.6929189
