This analysis finds a metamaterial absorber achieves over 90% absorption in various polarizations, suggesting effective use in radar and EMI applications.
This paper presents the design, fabrication, and machine learning (ML)-based optimization of a compact metamaterial absorber (MMA) exhibiting wideband absorption from 7.13–12.22 GHz. The proposed absorber is polarization insensitive and maintains strong absorption performance under oblique incidence. The fabricated prototype demonstrates >90% absorption up to 75° for TE polarization and up to 60° for TM polarization. The structure is designed and optimized using CST Microwave Studio, with ML algorithms employed to predict absorption characteristics efficiently, reducing computational cost. The absorber is fabricated using a PCB process and validated through free-space measurements, showing strong agreement with simulations. The experimental results confirm the absorber’s effectiveness for radar cross-section (RCS) reduction, EMI shielding, and sensing applications.
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Shekhar et al. (2025) studied this question.
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