A wideband metamaterial absorber based on magnetic resonator loaded with lumped resistors

doi:10.1088/1674-1056/21/12/127801

Abstract A wideband metamaterial absorber (MA) based on a magnetic resonator loaded with lumped resistors is presented. It is composed of a one-dimensional periodic array of double U shape structured magnetic resonators loaded with lumped resistors, dielectric substrate, and metal plate. We simulated, fabricated, measured, and analyzed the MA. The experimental results show that the reflectance (S₁₁) is below -10 dB at normal incidence in the frequency range of 7.7 GHz-18 GHz, and the peak value is about -20 dB. Simulated power loss density distributions indicate that wideband absorption of the MA is mainly attributable to the lumped resistors in the magnetic resonator. Further investigations indicate that the distance between two unit cells along the magnetic field direction significantly influences the performance of the MA.

Keywords: wideband metamaterial absorber lumped resistors

Received: 18 July 2012
Revised: 29 August 2012
Accepted manuscript online:

PACS:	78.20.Ci	(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
	41.20.Jb	(Electromagnetic wave propagation; radiowave propagation)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51207060) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20090142110004).

Corresponding Authors: Nie Yan
E-mail: nieyan@mail.hust.edu.cn

Cite this article:

Cheng Yong-Zhi (程用志), Gong Rong-Zhou (龚荣洲), Nie Yan (聂彦), Wang Xian (王鲜) A wideband metamaterial absorber based on magnetic resonator loaded with lumped resistors 2012 Chin. Phys. B 21 127801

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A wideband metamaterial absorber based on magnetic resonator loaded with lumped resistors

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