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

doi:10.1088/1674-1056/acea64

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 λ_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.

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

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