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Related Experiment Video

Updated: Aug 28, 2025

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Ultra-Broadband Absorber with Large Angular Stability Based on Frequency Selective Surface.

Shan Zhao1, Wenyu Li2, Zengrui Li2

  • 1School of New Media, Beijing Institute of Graphic Communication, Beijing 102600, China.

Materials (Basel, Switzerland)
|September 23, 2022
PubMed
Summary

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A novel low-profile electromagnetic absorber achieves ultra-broadband absorption (80% from 2.09-18.1 GHz) and maintains stability at large angles (up to 50°). This design is suitable for infrared detection, radiation cooling, and stealth applications.

Area of Science:

  • Electromagnetic metamaterials
  • Nanophotonics
  • Applied physics

Background:

  • Electromagnetic absorbers are crucial for various applications, including sensing and stealth.
  • Achieving ultra-broadband absorption with stable performance across wide angles remains a significant challenge.

Purpose of the Study:

  • To propose and demonstrate a low-profile, double-layer electromagnetic absorber.
  • To enhance angular stability and miniaturize the absorber design.
  • To achieve ultra-broadband absorption performance.

Main Methods:

  • Design of a square ring with concave-convex deformation to expand current paths and reduce oblique incidence effects.
  • Utilizing an equivalent circuit model for resonance and admittance analysis.
  • Fabrication and measurement of a prototype absorber (300 mm × 300 mm).
Keywords:
absorberfrequency selective surfacelarge angular stabilitystealth technologyultra-broadband

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Last Updated: Aug 28, 2025

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Main Results:

  • Achieved above 80% absorption in the ultra-broadband range of 2.09-18.1 GHz.
  • Demonstrated large-angle stability up to 50° under TE/TM polarization.
  • Simulated and measured results showed excellent agreement, confirming the absorber's performance.

Conclusions:

  • The designed absorber unit exhibits excellent ultra-broadband and large-angle absorption characteristics.
  • The proposed design offers a promising solution for applications in infrared detection, radiation refrigeration, and stealth technology.
  • The miniaturization and enhanced stability make it suitable for practical deployment.