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Chin. Phys. B, 2024, Vol. 33(2): 024101    DOI: 10.1088/1674-1056/acea64
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

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

Tao Wang(汪涛)1,†, Yu-Lun Yan(闫玉伦)1, Gong-Hua Chen(陈巩华)1, Ying Li(李迎)2,‡, Jun Hu(胡俊)1, and Jian-Bo Mao(毛剑波)1
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
Abstract  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 0.098 λmaxmax 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.
Keywords:  extra broadband      physical model      flexible metamaterial absorber      multi-layer      frequency selective surface  
Received:  26 April 2023      Revised:  26 June 2023      Accepted manuscript online:  26 July 2023
PACS:  41.20.Jb (Electromagnetic wave propagation; radiowave propagation)  
  42.25.Ja (Polarization)  
  42.25.Bs (Wave propagation, transmission and absorption)  
  78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))  
Fund: Project supported by the China Post-doctoral Science Foundation (Grant No. 2020M671834) and the Anhui Province Post-doctoral Science Foundation, China (Grant No. 2020A397).
Corresponding Authors:  Tao Wang, Ying Li     E-mail:  taowang@hfut.edu.cn;liying87@hfut.edu.cn

Cite this article: 

Tao Wang(汪涛), Yu-Lun Yan(闫玉伦), Gong-Hua Chen(陈巩华), Ying Li(李迎), Jun Hu(胡俊), and Jian-Bo Mao(毛剑波) A flexible ultra-broadband multi-layered absorber working at 2 GHz-40 GHz printed by resistive ink 2024 Chin. Phys. B 33 024101

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