A flexible ultra-broadband multi-layered absorber working at 2 GHz-40 GHz printed by resistive ink  

作　　者：汪涛 闫玉伦 陈巩华 李迎 胡俊 毛剑波 Tao Wang;Yu-Lun Yan;Gong-Hua Chen;Ying Li;Jun Hu;Jian-Bo Mao(School of Microelectronics,Hefei University of Technology,Hefei 230601,China;Special Display and Imaging Technology Innovation Center of Anhui Province,Academy of Photoelectric Technology,Hefei University of Technology,Hefei 230027,China)

机构地区：[1]School of Microelectronics,Hefei University of Technology,Hefei 230601,China [2]Special Display and Imaging Technology Innovation Center of Anhui Province,Academy of Photoelectric Technology,Hefei University of Technology,Hefei 230027,China

出　　处：《Chinese Physics B》2024年第2期329-333,共5页中国物理B（英文版）

基　　金：Project supported by the China Post-doctoral Science Foundation(Grant No.2020M671834);the Anhui Province Post-doctoral Science Foundation,China(Grant No.2020A397).

摘　　要：A flexible extra broadband metamaterial absorber(MMA)stacked with five layers working at 2 GHz–40 GHz is investigated.Each layer is composed of polyvinyl chloride(PVC),polyimide(PI),and a frequency selective surface(FSS),which is printed on PI using conductive ink.To investigate this absorber,both one-dimensional analogous circuit analysis and three-dimensional full-wave simulation based on a physical model are provided.Various crucial electromagnetic properties,such as absorption,effective impedance,complex permittivity and permeability,electric current distribution and magnetic field distribution at resonant peak points,are studied in detail.Analysis shows that the working frequency of this absorber covers entire S,C,X,Ku,K and Ka bands with a minimum thickness of 0.098λ_(max)(λ_(max) is the maximum wavelength in the absorption band),and the fractional bandwidth(FBW)reaches 181.1%.Moreover,the reflection coefficient is less than-10 dB at 1.998 GHz–40.056 GHz at normal incidence,and the absorptivity of the plane wave is greater than 80%when the incident angle is smaller than 50°.Furthermore,the proposed absorber is experimentally validated,and the experimental results show good agreement with the simulation results,which demonstrates the potential applicability of this absorber at 2 GHz–40 GHz.

关 键 词：extra broadband physical model flexible metamaterial absorber MULTI-LAYER frequency selective surface 

分 类 号：O441[理学—电磁学] TN713[理学—物理]