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Schematic of CPW electrode with graphene; the cross-sectional substrate (dimensions) of the electrode consists of Au(∼50 nm)/Al(∼300 nm)/Ti(∼10 nm)/SLG or MLG/SiO2(∼300 nm)/Si(∼300 μm). The gap and width between signal lines shown in the SEM image are 20 μm and 20 μm, respectively.
Magnitude and phase (inset) of S-parameters of fitted and measured graphenes; the S-parameters of (a) SLG and (b) MLG.
TL circuit modeling of graphene and its characteristic parameters; (a) the de-embedded TL circuit model, (b) the real and imaginary parts of characteristic impedance, and (c) the attenuation and phase constant of simulated and measured graphene.
Microwave and DC effective conductivities of CVD-grown graphenes at room temperature. σm/w and σdc are the microwave and DC conductivity, respectively.
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