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 similar to 300 nm SiO2 layer grown through thermal oxidation. Microwave Study of Field-Effect Devices Based on Graphene ... Operation of a variety of devices, including tunable antennae 8, optical modulators and waveguides 9,10,11,12,13,14, ... A tunable microwave slot antenna based on graphene. Graphene based functional devices: A short review ... Graphene offers multiple functions of signal transmission, emission, modulation, and detection in a broad band, high speed, compact size, and low loss. Here, we have a brief view of graphene based functional devices at microwave, terahertz, and optical frequencies. Their fundamental physics and computational models were discussed as well. Antenna-Integrated 0.6 THz FET Direct Detectors Based on ...
Graphene enables an electrically-tunable plasmonic mid ...
Microwave synthesis 'zaps' graphene to perfection A quick and efficient way to produce single-layer graphene using microwaves and ionic liquids has been found by RIKEN researchers. Takuzo Aida from the RIKEN Center for Emergent Matter Science and colleagues from across Japan theorized that using everyday microwave ovens might improve graphene synthesis. A graphene solution for microwave interference -- ScienceDaily A single layer of graphene can absorb up to 25% of incident microwave radiation, which is a lot for a one atom-thick material. With a multilayer graphene/PMMA arrangement, the absorption rises to 50%.
Nano-RF is a European project and the main concept is the ...
iWAT2014 - Detailed Program Applications of the HTS devices based on Josephson junctions have been extended from lower electromagnetic bands (microwave) into mm-wave and terahertz, regions. dual band thermal: Topics by WorldWideScience.org This technique is based on a delicately designed topology of L- and Ku- band microwave filters. The two band-pass responses are generated by a capacitively-loaded square-loop frequency selective surface and an aperture-coupled frequency … dielectric resonator antenna: Topics by WorldWideScience.org On top of the slot there is an air cavity and on top, a small portion of a hemispherical lens. The fractional bandwidth of such antennas is around 10 percent, which is good enough for heterodyne imaging applications.The new geometry makes … Best Paper Finalists — Eucap 2016
bias tunable quantum: Topics by WorldWideScience.org
A Microwave Field Effect Transistor Based on Graphene In this way, microwave switches can be implemented based on the specific charge carrier transport in graphene. The maximum stable gain of the transistor isroom temperature [4], and (iii) tunable input impedances around 50 Ω, specific for RF applications, in microwave devices based on graphene [5]...
Development of Graphene Based Tapered Slot Antennas for ...
This paper presents a radiation pattern reconfigurable Yagi-Uda antenna based on graphene operating at terahertz frequencies. The antenna can be reconfigured to change the main beam pattern into two or four different radiation directions. The proposed antenna consists of a driven dipole radiation ... Broadband tunable terahertz polarization converter based ... We design and numerically investigate a broadband tunable terahertz polarization converter based on graphene metamaterial. The converter presents a broad conversion band with high polarization conversion ratio (>0.95) in terahertz frequency over a bandwidth which is 25.8% of the central frequency. Nano-RF is a European project and the main concept is the ...
Graphene based functional devices: A short review ...