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A Flexible and Optical Transparent Metasurface Absorber with Broadband RCS Reduction Characteristics.

Babar Hayat1, Jinling Zhang1, Adil Khan2

  • 1School of Electronic Engineering, Beijing University of Posts and Telecommunication, Beijing 100876, China.

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Summary

This study presents a novel, flexible, and transparent metasurface absorber (MSA) for microwave frequencies. The new design achieves over 90% absorption and significantly reduces radar cross-section for stealth applications.

Keywords:
RCS reductionabsorberbroadbandflexibletransparent

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Area of Science:

  • Materials Science
  • Electromagnetics
  • Nanotechnology

Background:

  • Metasurface absorbers (MSAs) are crucial for stealth technology but often lack flexibility and transparency.
  • Conventional MSAs have limitations in certain advanced radar stealth applications due to their rigid and opaque nature.

Purpose of the Study:

  • To introduce a novel metasurface absorber (MSA) with both optical transparency and mechanical flexibility.
  • To achieve broadband microwave absorption and evaluate its effectiveness in reducing radar cross-section (RCS).

Main Methods:

  • Fabrication of an MSA using a flexible polyvinyl chloride (PVC) substrate and an indium tin oxide (ITO) resistive film.
  • Characterization of electromagnetic wave absorption performance across a broad microwave frequency range (9.85-41.76 GHz).
  • Assessment of radar cross-section (RCS) reduction capabilities at various incidence angles (0° to 60°).

Main Results:

  • The proposed MSA demonstrates over 90% absorption of incident electromagnetic waves across the 9.85-41.76 GHz frequency band.
  • Significant radar cross-section reduction exceeding 10 dB was observed across the entire operational frequency spectrum.
  • The absorber maintained high performance across a wide range of incidence angles, from 0° to 60°.

Conclusions:

  • The developed flexible and transparent MSA offers a promising solution for advanced stealth applications.
  • The device effectively suppresses electromagnetic wave energy and reduces radar signatures, overcoming limitations of conventional designs.
  • This work paves the way for integrating high-performance absorbers into various platforms requiring both stealth and optical transparency.