Applied Sciences | |
Electromagnetic Properties of Graphene-like Films in Ka-Band | |
Sofia Voronovich1  Alesya Paddubskaya1  Konstantin Batrakov1  Polina Kuzhir1  Sergey Maksimenko1  Tommi Kaplas2  | |
[1] Research Institute for Nuclear Problems of Belarusian State University, Bobruiskaya str., 11, Minsk 220030, Belarus; E-Mails:;Institute of Photonics, University of Eastern Finland, P.O. Box 111, Joensuu FI-80101, Finland; E-Mail: | |
关键词: microwave frequency range; reflectance; transmittance; absorbance; thin films; pyrolytic carbon; numerical simulation; rectangular waveguide; | |
DOI : 10.3390/app4020255 | |
来源: mdpi | |
【 摘 要 】
We studied electromagnetic properties of pyrolytic carbon (PyC) films with thicknesses from 9 nm to 110 nm. The PyC films consisted of randomly oriented and intertwined graphene flakes with a typical size of a few nanometers were synthesized by chemical vapor deposition (CVD) at 1100 °C on a quartz substrate. The reflectance and transmittance of these films in Ka-band, 26–37 GHz, were studied both experimentally and theoretically. The discovered remarkably high absorption loss of up to 50% of incident power, along with chemical stability, makes PyC films attractive for electromagnetic (EM) interference shielding in space and airspace communication systems, as well as in portable electronic devices occupying this frequency slot. Since, in practical applications, the PyC film should be employed for coating of dielectric surfaces, two important issues to be addressed are: (i) which side (front or back) of the substrate should be covered to ensure maximum absorption losses; and (ii) the frequency dependence of absorbance/transmittance/reflectance of binary PyC/quartz structures in the Ka-band.
【 授权许可】
CC BY
© 2014 by the authors; licensee MDPI, Basel, Switzerland.
【 预 览 】
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RO202003190025972ZK.pdf | 2537KB | download |