天美影视

Aoyama Gakuin University (College of Science and Engineering Department of Electrical Engineering and Electronics) and the Institute of Environmental Electromagnetic Engineering (College of Science and Engineering Department of Electrical Engineering and Electronics), have succeeded in reducing the carrier density to about 10 times that of a single layer and the sheet resistance to about 1/9 of a single layer while maintaining a high transmittance of over 90% by carrier doping of a triple-layered graphene transparent antenna. The result is a transparent antenna with a higher radiation efficiency than conventional antennas. As a result, a higher radiation efficiency (52.5%) than before was achieved, bringing us closer to the realization of graphene transparent antennas that can be used for in-vehicle antennas and other applications.

The radio frequency band for 5G has a problem that radio waves are difficult to reach over long distances and behind obstacles, so it is necessary to install more antennas.

Transparent antennas using ITO (transparent conductive film) or metal mesh are currently in practical use, but graphene's unique properties of "high transparency" and "stronger than diamond in a flat surface" are expected to be used in car glass antennas that do not obstruct visibility and building window glass antennas that do not spoil the scenery. The material is expected to be used in automotive glass antennas that do not obstruct visibility and in building window glass antennas that do not spoil the scenery.

Graduate School of Science and Engineering A paper by Shohei Kosuge, a third-year doctoral student in the Department of Science and Engineering, and his colleagues was published in AIP Advances and selected as a featured article (journal's best).

Paper: Optically transparent antenna based on carrier-doped three-layer stacked graphene. (DOI: 10.1063/5.0037907)

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