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.
关键词
二硫化锡/还原氧化石墨烯/阻抗匹配/吸波体/极化不敏感
Key words
Tin disulfide/reduced graphene oxide/impedance matching/wave absorber/polarization insensitive
维普
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