基于超材料的微波宽带完美吸波体设计

doi:10.11896/cldb.20040027

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Abstract In order to achieve broadband stable absorption of electromagnetic wave, a microwave broadband perfect metamaterial absorber (MA) with a smooth absorption band is designedin this paper. The equivalent circuit model and COMSOL simulation software is used to optimize the structure parameters of the MA. The origin of the absorption mechanism is analyzed by the electric field and surface current distributions, and which is also explained by the equivalent input impedance. The polarization and oblique incidence characteristics and the absorption response of each layer are further studied. Results show that the absorptivity of the MA proposed in this paper is more than 90% in the range of 5—9.2 GHz, and the average absorption of the MA is 97.71%, perfect absorption happened in the broadband of 5.9—8 GHz (the absorptivity is more than 99%, and the reflectivity is less than 1%), and the structure has good polarization and wide incident angle stability. The thickness and unit size of the MA proposed in this paper are 0.12λ₀ and 0.29λ₀×0.29λ₀ (λ₀ is the wavelength at the center frequency of the absorption band), respectively. Moreover, by changing the permittivity of the dielectric substrate, the operating band can be adjusted on the premise that the waveform is basically unchanged, it has good frequency band portability and can be applied to stealth technology, electromagnetic compatibility, and other fields.

Key words： metamaterial absorber broadband perfect absorption microwave

Published: 01 July 2021

CLC number:

TB34

Fund:National Natural Science Foundation of China (61863020).

About author:: Lei Sun, master postgraduate. His research direction is electromagnetic field and microwave technology, electromagnetic metamaterials. At present, he has been published a SCI paper as the first author.
Jun Sun, Ph.D., master's supervisor. His research fields include electromagnetic field and microwave technology, metamaterials, electromagnetic field numerical calculation, multi-physical field coupling simulation, and other frontier interdisciplinary subjects related to information science. At present, more than 10 EI and SCI papers have been published.

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	SUN Lei
	SUN Jun
	GAO Xiaomei
	YANG Biao
	ZHANG Jing
	ZHOU Yao

Cite this article:

SUN Lei,SUN Jun,GAO Xiaomei, et al. Design of Microwave Broadband Perfect Absorber Based on Metamaterial[J]. Materials Reports, 2021, 35(12): 12014-12019.

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http://www.mater-rep.com/EN/10.11896/cldb.20040027 OR http://www.mater-rep.com/EN/Y2021/V35/I12/12014

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