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Terahertz VO2-Based Dynamic Coding Metasurface for Dual-Polarized, Dual-Band, and Wide-Angle RCS Reduction.

Ling Wang1,2, Feng Gao1,2, Shuhua Teng1,2

  • 1School of Electronic Information, Hunan First Normal University, Changsha 410205, China.

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Summary

This study introduces a novel terahertz dynamic coding metasurface using vanadium dioxide (VO2) for effective radar cross-section (RCS) reduction. The device achieves dual-polarized, dual-band, and wide-angle RCS reduction, crucial for terahertz stealth applications.

Keywords:
RCS reductioncoding metasurfaceterahertzvanadium dioxide

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Area of Science:

  • Electromagnetic metamaterials
  • Terahertz technology
  • Stealth technology

Background:

  • Existing research on radar cross-section (RCS) reduction metasurfaces is limited to fixed performance in the microwave band.
  • Terahertz radar technology development necessitates advanced electromagnetic devices for RCS reduction.

Purpose of the Study:

  • To propose a dynamic coding metasurface for terahertz RCS reduction.
  • To integrate vanadium dioxide (VO2) for tunable electromagnetic properties.
  • To achieve dual-polarized, dual-band, and wide-angle RCS reduction.

Main Methods:

  • Design and simulation of a terahertz dynamic coding metasurface incorporating VO2.
  • Analysis of RCS reduction by switching VO2 states between insulator and metal.
  • Evaluation of performance under dual-polarized, dual-band, and wide-angle incident waves.

Main Results:

  • The metasurface achieves effective RCS reduction from 0.18 THz to 0.24 THz and 0.21 THz to 0.39 THz for circularly polarized waves.
  • A 10 dB RCS reduction is maintained for incident angles up to 40° (polar) and 360° (azimuth).

Conclusions:

  • The proposed VO2-integrated dynamic coding metasurface offers significant potential for terahertz stealth applications.
  • This tunable metasurface provides a promising solution for advanced electromagnetic devices in the terahertz spectrum.