Development of Single layered, Wide angle, Polarization insensitive Metamaterial Absorber

Atipriya Sharma; Ravi Panwar; Rajesh Khanna

doi:10.14429/dsj.71.16701

Atipriya Sharma Electronics and Communication Engineering Department, Thapar Institute of Engineering and Technology, Patiala - India https://orcid.org/0000-0001-6825-868X
Ravi Panwar Discipline of Electronics and Communication Engineering, Indian Institute of Information Technology, Design and Manufacturing, Jabalpur - India https://orcid.org/0000-0002-9015-0891
Rajesh Khanna Electronics and Communication Engineering Department, Thapar Institute of Engineering and Technology, Patiala - India https://orcid.org/0000-0002-2331-1667

DOI: https://doi.org/10.14429/dsj.71.16701

Keywords: Absorber, Metamaterial, Multiband, Polarization-independent

Abstract

The simultaneous achievement of multiband absorption, polarisation-insensitive, and angularly stable absorber is a difficult job. Therefore, in this article, an efficient single-layered absorber is designed, critically analysed, fabricated, and experimentally validated. The proposed model incorporates eight sectors loaded a circle inside the square. The four discrete absorption peaks are observed at 4.4 GHz, 6.0 GHz, 14.1 GHz, and 16.0 GHz manifesting absorption intensities of 94%, 84%, 82%, and 92%, respectively. Parametric studies have been also exercised to investigate the influence of discrete geometrical design variables on the proposed absorber. The proposed structure is symmetrical in geometry, consequence in polarisation-independent behaviour. The absorption mechanism is also explained by analysing the surface current, electric field, and magnetic field distributions. Besides, the complex electromagnetic parameters are extracted to realise the absorption phenomenon. Additionally, to validate the simulated results, an optimal sample is fabricated and the measured response is well-matched with simulated ones.