Multi-layer radar absorber design with ald-coated fabrics

Abstract

In this study, for the first time, a multilayer radar absorber (MRA) is designed using fabrics coated with the Atomic Layer Deposition (ALD) technique. For this purpose, cotton, glass, and polyester fabrics are coated with ZnO and TiO2 of different thicknesses between 20 and 100 nm. Permittivity and permeability values of the coated fabrics are determined with Vector Network Analyzer (VNA) waveguide characterization kits in the 2-8 GHz band. 34 different materials consisting of different fabrics coated with different thicknesses are obtained. The double-stage ABC algorithm was used in the design of the MRA structure, and 5 different designs were obtained. In the 2-8 GHz band, 0 degrees\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$<^>\circ$$\end{document}-40 degrees\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$<^>\circ$$\end{document} incidence angle, 3 different designs with a maximum reflection coefficient of - 10 dB for both transverse magnetic (TM) and transverse electric (TE) polarizations are obtained. Then materials were brought together to verify the simulation results with the waveguide measurement kit. The produced multilayer radar absorber (MRA) promises hope for defense and health applications with its lightweight and effective performance.