A New Compact Octagonal Shape Perfect Metamaterial Absorber for Microwave Applications

Mohammad Hossain,Kamarulzaman Mat,Mohammad Islam,Mohammad Faruque

doi:10.3390/app7121263

Mohammad Hossain, Kamarulzaman Mat + Show 2 more

Open Access

https://doi.org/10.3390/app7121263

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Abstract

A new compact octagonal shape perfect metamaterial absorber (PMA) design, numerical simulation, fabrication, and investigational verification of unit cell that is based on a simple structure are presented in this paper. The suggested structure comprised of three layers, in which interact to produce the plasmonic resonances. The finite-integration technique (FIT) based Computer Simulation Technology (CST) microwave electromagnetic simulator was utilized to examine the design parameters and conduct absorption analysis. The design structure exhibited peak absorption values as 99.64% and 99.95% at frequencies 8.08 GHz and 11.41 GHz, respectively. The absorption characteristics were analysed using the polarization angle of the structure, layer thickness, PMA with resistive load, and number of rings. An N5227A vector network analyser was used for the measurement. The measured results of the fabricated prototype were in good agreement with the simulation results. The suggested perfect absorber structure enables innumerable application aimed at X-band for applications like, defence, security, and stealth technology.

Highlights

Artificial metamaterials (MMs) are engineered composites consisting of sub-wavelength metallic structures in a host dielectric medium, which are engineered to obtain unconventional properties that are not found naturally
The simulations of solver the unit cell structure and structure executedport using a full-wave frequency frequency domain based on the Finite-integration technique (FIT)
Authors have obtained a small amount of absorption

Summary

Introduction

Artificial metamaterials (MMs) are engineered composites consisting of sub-wavelength metallic structures in a host dielectric medium, which are engineered to obtain unconventional properties that are not found naturally. Due to the unconventional electromagnetic properties of numerous metamaterials, namely the (-) ve permittivity, (-) ve permeability, (-) ve refractive index, and invisibility, the design and application of MMs has gained the priority of vigorous research [1,2]. The absorption peak of the structure was 96.5%, 96.8%, and 99.6% at 2.15 GHz, 2.28 GHz, and 2.38 GHz, respectively [13]. The design structure displayed the absorption of 99.3%, 97.1%, and 98.6% at 5.45 GHz, 15.46 GHz, and 19.48 GHz, respectively [14]. Dincer et al [15]

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