Microwave conductivity measurements of a graphene monolayer over D-band

Autor: Morteza Shahpari, Farhat Majeed, David V. Thiel, Thomas Fickenscher
Rok vydání: 2018
Předmět:
Zdroj: 2018 Australian Microwave Symposium (AMS).
DOI: 10.1109/ausms.2018.8346983
Popis: Polyethylene teraphthalate (PET). Multiple reflections due to substrate-air interface and horn antenna(s) were eliminated using a time gated Fourier transformed pulse excitation. The graphene film on PET substrate increased the reflection (S 11 ) by 3–4dB over the entire frequency range, and the transmission coefficient (S 21 ) decreased by 1–2dB. The surface conductivity σ g ≈ 0.003–0.005 S/sq. was calculated from measured scattering parameters using Liang's formula. The result was comparable to its theoretically predicted values (Kubo's formula) over the frequency band of interest.
Databáze: OpenAIRE