Related Experiment Video
Updated: Aug 28, 2025
13:44
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
15.4K
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
Summary
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).
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.
