期刊
MICROMACHINES
卷 11, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/mi11100930
关键词
hybrid absorber; metamaterial; dielectric layer; ultra-wideband absorber; anechoic chamber
类别
资金
- European Union through the European Regional Development Fund (ERDF)
- Ministry of Higher Education and Research
- Brittany Region
- Cotes d'Armor Departement
- Saint Brieuc Armor Agglomeration through the CPER Project MATECOM
- Saint Brieuc Armor Agglomeration through the CPER Project SOPHIE-STICC
- Syndicat de Gestion du Pole Universitaire de Saint Brieuc (France)
In this paper, we propose a novel design of an ultra-wideband hybrid microwave absorber operating in the frequency range between 2 GHz and 18 GHz. This proposed hybrid absorber is composed of two different layers that integrate a multiband metamaterial absorber and a lossy dielectric layer. The metamaterial absorber consists of a periodic pattern that is composed of an arrangement of different scales of coupled resonators and a metallic ground plane, and the dielectric layer is made of epoxy foam composite loaded with low weight percentage (0.075 wt.%) of 12 mm length carbon fibers. The numerical results show a largely expanded absorption bandwidth that ranges from 2.6 GHz to 18 GHz with incident angles between 0 degrees and 45 degrees and for both transverse electric and transverse magnetic waves. The measurements confirm that absorption of this hybrid based metamaterial absorber exceeds 90% within the above-mentioned frequency range and it may reach an absorption rate of 99% for certain frequency ranges. The proposed idea offers a further step in developing new electromagnetic absorbers, which will impact a broad range of applications.
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