Ultra-wideband symmetric G-shape metamaterial-based microwave absorber

ABSTRACT

This paper investigates the absorption features of the symmetric G-shape metamaterial absorber (MA) at the microwave frequency range for the ultra-wideband. The proposed metamaterial structure attains above 95% absorptivity in the frequency range of 20–60 GHz. It also analyses the absorptivity of the ultra-wideband MA for the different incidence angles of the electromagnetic (EM) wave. The absorptivity is the function of the angle of incidence of EM waves for the proposed G-shape metamaterial structure and it attains maximum absorptivity for the normal incidence. Such a wideband absorber would be useful for the multifarious applications including wideband filtering and stealth metamaterial in the Ku, K-, Ka- Q- and U-bands.

KEYWORDS:

• Metamaterial
• ultra-wideband absorber
• filtering
• stealth

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was partially supported by the Higher Education Commission Pakistan (HEC) under [grant number 21-1811/SRGP/R&D/HEC/2017].

Notes on contributors

S. A. Naqvi

Syed Aftab Naqvi received the Ph.D. degree in electrical engineering from North Dakota State University, Fargo, ND, USA, in 2014. Currently, he is an Assistant Professor in the Department of Electrical Engineering at COMSATS University Islamabad, Sahiwal, Pakistan. His research interests include cloaking, antenna design for biosensors, MIMO antenna array for 5G applications and methods in computational electromagnetics.

M. A. Baqir

Muhammad Abuzar Baqir received the M.Phil. and M.Sc. degrees from department of Electronics, Quaid-i-Azam University Islamabad, in 2008 and 2011, respectively. Thereafter, he received doctoral degree from the institute of Microengineering and Nanoelectronics belonging to the Universiti Kebangsaan Malaysia (The National University of Malaysia), in 2017. Since 2017, he is working as a tenure track Assistant Professor in the Department of Electrical Engineering at COMSATS University Islamabad, Sahiwal. His current research interests include light–matter interaction, photonic crystals, graphene, periodic structures and metamaterial absorbers. He has earned more than thirty-five publications in peer-reviewed journals and conference proceedings; he has contributed to one book chapter. He serves as a reviewer in the IEEE Antenna and wireless propagation letters, IEEE Photonics Journal, IEEE Sensors Journal, IET Micro and Nano Letters, and IET Power electronics, among others.