Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 120, Issue 9, Pages -Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.2209807120
Keywords
graphene-assembled film; 5G technology; flexible electronics; wireless communication; electromagnetic protection
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A graphene-assembled film (GAF) is introduced as a potential alternative to metal-based conducting materials in wireless communication and EMI shielding devices. GAF exhibits strong anticorrosive behavior and outperforms copper in terms of antenna bandwidth, EMI shielding effectiveness, and frequency selectivity.
Since first developed, the conducting materials in wireless communication and electro-magnetic interference (EMI) shielding devices have been primarily made of metal-based structures. Here, we present a graphene-assembled film (GAF) that can be used to replace copper in such practical electronics. The GAF-based antennas present strong anticorrosive behavior. The GAF ultra-wideband antenna covers the frequency range of 3.7 GHz to 67 GHz with the bandwidth (BW) of 63.3 GHz, which exceed similar to 110% than the copper foil-based antenna. The GAF Fifth Generation (5G) antenna array features a wider BW and lower sidelobe level compared with that of copper antennas. EMI shielding effectiveness (SE) of GAF also outperforms copper, reaching up to 127 dB in the frequency range of 2.6 GHz to 0.32 THz, with a SE per unit thickness of 6,966 dB/mm. We also confirm that GAF metamaterials exhibit promising frequency selection characteristics and angular stability as flexible frequency selective surfaces.
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