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Updated: Jul 25, 2025
13:44
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
15.4K
Quad-Band Metamaterial Perfect Absorber with High Shielding Effectiveness Using Double X-Shaped Ring Resonator
Mst Ishrat Jahan1, Mohammad Rashed Iqbal Faruque1, Md Bellal Hossain1
1Space Science Centre (ANGKASA), Institute of Climate Change (IPI), Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia.
Materials (Basel, Switzerland)
|June 28, 2023
Summary
This study presents a quad-band metamaterial perfect absorber (MPA) using a double X-shaped ring resonator for effective electromagnetic interference (EMI) shielding. The novel MPA achieves over 99.8% absorption and >45 dB shielding effectiveness across four frequency bands.
Area of Science:
- Electromagnetics
- Materials Science
- Nanotechnology
Background:
- Electromagnetic interference (EMI) poses challenges in electronic systems, necessitating effective shielding solutions.
- Metamaterial perfect absorbers (MPAs) offer promising capabilities for advanced EMI shielding due to their tailored electromagnetic responses.
- Existing MPAs often face limitations in bandwidth and shielding effectiveness, driving the need for improved designs.
Purpose of the Study:
- To design and evaluate a quad-band metamaterial perfect absorber (MPA) for electromagnetic interference (EMI) shielding applications.
- To investigate the absorption characteristics and shielding effectiveness of the proposed MPA across multiple frequency bands.
- To explore the underlying electromagnetic mechanisms responsible for the MPA's performance.
Main Methods:
- A unit cell design featuring double X-shaped ring resonators on a Rogers RT5870 substrate was proposed.
- Simulations were conducted to analyze absorption, reflection, and shielding effectiveness for transverse electric (TE) and transverse magnetic (TM) modes.
- Electromagnetic field and surface current distributions were analyzed to understand absorption mechanisms.
- An analogous circuit model was developed using ADS software for validation.
Main Results:
- The MPA demonstrated maximum absorption exceeding 99.8% at four distinct frequencies: 4.87 GHz, 7.49 GHz, 11.78 GHz, and 13.09 GHz.
- High shielding effectiveness of over 45 dB was achieved across all four absorption bands for both TE and TM modes.
- Analysis of electromagnetic fields and surface currents elucidated the mechanisms behind the quad-band perfect absorption.
- The analogous circuit model confirmed the potential for developing superior MPAs.
Conclusions:
- The proposed double X-shaped ring resonator MPA exhibits excellent quad-band absorption and high shielding effectiveness, making it suitable for EMI shielding.
- The design offers a promising solution for mitigating electromagnetic interference in various electronic and communication systems.
- Further development using circuit modeling can lead to optimized MPAs with enhanced performance characteristics.
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