Metamaterial wave absorbers based on tin disulfide/reduced graphene oxide
A metamaterial wave absorber was designed by combining a tin disulfide/reduced graphene oxide composite and metal backsheet.The metamaterial wave absorber was simulated using CST electromagnetic simulation software.The results show that the wave absorber structure is characterized by ultra-broadband and high absorption.At the vertical incidence of electromagnetic waves,the absorptivity of the structure is higher than 90％in the frequency range of 10.7-17.1 GHz,and the overall thickness of the structure is only 0.33λ0(λ0 is the wavelength corresponding to the lowest cut⁃off frequency).To verify the feasibility of the design,sample structures have been machined and fabricated and tested.The test results agree well with the simulation results.Simulation analysis of electromagnetic field distribution and ener⁃gy loss shows that the structure achieves energy loss to electromagnetic waves through concentric rings and edge scatter⁃ing effects as well as inter-cell coupling effects.This work solves problems of narrow absorption bandwidth and poor ther⁃mal stability of conventional metamaterial structures,and has potential applications in electromagnetic radiation suppres⁃sion for satellite broadcasting,satellite communications and 5G communications.
Tin disulfidereduced graphene oxideimpedance matchingwave absorberpolarization insensitive
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