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Title: A tunable microwave slot antenna based on graphene

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 SiO{sub 2} layer grown through thermal oxidation. A CVD grown graphene layer is transferred on the SiO{sub 2}. 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.
Authors:
; ; ;  [1] ; ;  [1] ;  [2] ; ;  [3] ; ;  [4] ;  [5]
  1. National Institute for Research and Development in Microtechnology (IMT), Str. Erou Iancu Nicolae 126 A, 077190 Bucharest-Voluntari (Romania)
  2. (Romania)
  3. Foundation for Research and Technology Hellas (FORTH), P.O. Box 1527, Vassilika Vuton, Heraklion 71110, Crete, Hellas (Greece)
  4. Università Politecnica delle Marche, via Brecce Bianche 12, 60131 Ancona (Italy)
  5. Tyndall National Institute, Lee Maltings Complex, Dyke Parade, Cork (Ireland)
Publication Date:
OSTI Identifier:
22398905
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 15; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORBENTS; ANTENNAS; CHEMICAL VAPOR DEPOSITION; COMPUTERIZED SIMULATION; EFFICIENCY; ELECTRIC CONDUCTIVITY; ELECTRIC POTENTIAL; FREQUENCY DEPENDENCE; GHZ RANGE; GRAPHENE; LAYERS; METALS; MICROWAVE RADIATION; OXIDATION; REFLECTION; SILICON OXIDES; SURFACES