The paper presents the experimental and modeling results of a microwave slot antenna in a coplanar configuration based on graphene. The antennas are fabricated on a 4 in. high-resistivity Si wafer, with a ∼300 nm SiO2 layer grown through thermal oxidation. A CVD grown graphene layer is transferred on the SiO2. The paper shows that the reflection parameter of the antenna can be tuned by a DC voltage. 2D radiation patterns at various frequencies in the X band (8-12 GHz) are then presented using as antenna backside a microwave absorbent and a metalized surface. Although the radiation efficiency is lower than a metallic antenna, the graphene antenna is a wideband antenna while the metal antennas with the same geometry and working at the same frequencies are narrowband. © 2015 AIP Publishing LLC
A tunable microwave slot antenna based on graphene / Dragoman, Mircea; Neculoiu, Dan; Bunea, Alina Cristina; Deligeorgis, George; Aldrigo, Martino; Vasilache, D.; Dinescu, A.; Konstantinidis, George; Mencarelli, Davide; Pierantoni, Luca; Modreanu, M.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - STAMPA. - 106:15(2015), pp. 153101-1-153101-5. [10.1063/1.4917564]
A tunable microwave slot antenna based on graphene
MENCARELLI, Davide;PIERANTONI, Luca;
2015-01-01
Abstract
The paper presents the experimental and modeling results of a microwave slot antenna in a coplanar configuration based on graphene. The antennas are fabricated on a 4 in. high-resistivity Si wafer, with a ∼300 nm SiO2 layer grown through thermal oxidation. A CVD grown graphene layer is transferred on the SiO2. The paper shows that the reflection parameter of the antenna can be tuned by a DC voltage. 2D radiation patterns at various frequencies in the X band (8-12 GHz) are then presented using as antenna backside a microwave absorbent and a metalized surface. Although the radiation efficiency is lower than a metallic antenna, the graphene antenna is a wideband antenna while the metal antennas with the same geometry and working at the same frequencies are narrowband. © 2015 AIP Publishing LLCI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
