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Volume 5 Issue 3
May  2023
Article Contents

Huang Y H et al. 2023. A direct laser-synthesized magnetic metamaterial for low-frequency wideband passive microwave absorption. Int. J. Extrem. Manuf. 5 035503.
Citation: Huang Y H et al. 2023. A direct laser-synthesized magnetic metamaterial for low-frequency wideband passive microwave absorption. Int. J. Extrem. Manuf. 035503.

A direct laser-synthesized magnetic metamaterial for low-frequency wideband passive microwave absorption


doi: 10.1088/2631-7990/acdb0c
More Information
  • Publish Date: 2023-05-18
  • Microwave absorption in radar stealth technology is faced with challenges in terms of its effectiveness in low-frequency regions. Herein, we report a new laser-based method for producing an ultrawideband metamaterial-based microwave absorber with a highly uniform sheet resistance and negative magnetic permeability at resonant frequencies, which results in a wide bandwidth in the L- to S-band. Control of the electrical sheet resistance uniformity has been achieved with less than 5% deviation at 400 Ω sq-1 and 6% deviation at 120 Ω sq-1, resulting in a microwave absorption coefficient between 97.2% and 97.7% within a 1.56-18.3 GHz bandwidth for incident angles of 0◦-40◦, and there is no need for providing energy or an electrical power source during the operation. Porous N- and S-doped turbostratic graphene 2D patterns with embedded magnetic nanoparticles were produced simultaneously on a polyethylene terephthalate substrate via laser direct writing. The proposed low-frequency,wideband, wide-incident-angle, and high-electromagnetic-absorption microwave absorber can potentially be used in aviation, electromagnetic interference (EMI) suppression, and 5G applications.

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A direct laser-synthesized magnetic metamaterial for low-frequency wideband passive microwave absorption

doi: 10.1088/2631-7990/acdb0c
  • 1 Laser Processing Research Centre, Department of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Oxford Road, M13 9PL Manchester, United Kingdom;
  • 2 Department of Electrical and Electronics Engineering, The University of Manchester, Oxford Road, M13 9PL Manchester, United Kingdom;
  • 3 National Physical Laboratory, London, United Kingdom;
  • 4 National Graphene Institute, The University of Manchester, Oxford Road, M13 9PL Manchester, United Kingdom;
  • 5 Department of Materials, The University of Manchester, Oxford Road, M13 9PL Manchester, United Kingdom;
  • 6 Department of Physics and Astronomy, The University of Manchester, Oxford Road, M13 9PL Manchester, United Kingdom;
  • 7 Institute for Functional Intelligent Materials, National University of Singapore, 117544 Singapore, Singapore;
  • 8 Chongqing 2D Materials Institute, Liangjiang New Area, Chongqing 400714, People's Republic of China;
  • 9 Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, People's Republic of China

Abstract: 

Microwave absorption in radar stealth technology is faced with challenges in terms of its effectiveness in low-frequency regions. Herein, we report a new laser-based method for producing an ultrawideband metamaterial-based microwave absorber with a highly uniform sheet resistance and negative magnetic permeability at resonant frequencies, which results in a wide bandwidth in the L- to S-band. Control of the electrical sheet resistance uniformity has been achieved with less than 5% deviation at 400 Ω sq-1 and 6% deviation at 120 Ω sq-1, resulting in a microwave absorption coefficient between 97.2% and 97.7% within a 1.56-18.3 GHz bandwidth for incident angles of 0◦-40◦, and there is no need for providing energy or an electrical power source during the operation. Porous N- and S-doped turbostratic graphene 2D patterns with embedded magnetic nanoparticles were produced simultaneously on a polyethylene terephthalate substrate via laser direct writing. The proposed low-frequency,wideband, wide-incident-angle, and high-electromagnetic-absorption microwave absorber can potentially be used in aviation, electromagnetic interference (EMI) suppression, and 5G applications.

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