Ultra-wideband absorber design based on Sprott (2014) chaotic system for high-performance microwave applications

Abstract

This study presents an analysis of the Sprott (Phys. Lett. A378 1361–1363, 2014) chaotic patterned electromagnetic absorber, which exhibits a broadband band absorption rate in the range of 2–20 GHz. The application studies commenced with an analysis of the parameters of the Sprott (2014) chaotic attractor, resulting in the generation of three-dimensional plane images. Given that the z-plane has a standard thickness of 0.035 mm in the electromagnetic absorber to be designed, the three-dimensional images obtained were processed with various iterations in the Julia fractal and transformed into two-dimensional patterns. These patterns were then examined in the simulation environment to assess the electromagnetic absorption of the patterns. In the design of the electromagnetic absorber, the chaotic patterns have been defined as copper with a standard thickness of 0.035 mm, and Magtrex 555, which exhibits frequency-dependent permeability, was selected as the substrate. In order to achieve the maximum absorption value, the back layer of the electromagnetic absorber structure was coated with copper sheet. This study examines the impact of the design parameters, including substrate thickness, absorber size, and substrate type, on the absorption rate of the electromagnetic absorber through a parametric analysis. The operational methodology of the proposed structure was elucidated through an examination of the electric field and surface current distributions at various resonant frequencies. The characteristics of the Sprott (2014) chaotic patterned electromagnetic absorber were subjected to a comprehensive analysis, which reveals its potential for integration into a multitude of contemporary applications. Notably, this study marks the inaugural application of the Sprott (2014) chaotic method in the design and optimization of a metamaterial absorber, thereby contributing a novel perspective to the existing literature on the subject.