期刊
JOURNAL OF ELECTROMAGNETIC ENGINEERING AND SCIENCE
卷 16, 期 2, 页码 106-111出版社
KOREAN INST ELECTROMAGNETIC ENGINEERING & SCIENCE
DOI: 10.5515/JKIEES.2016.16.2.106
关键词
Absorption Bandwidth; Capacitive Screen; Design Equations; Resistive Sheet; Thin Absorber
资金
- National Research Foundation of Korea - Korean government (Ministry of Education and Science Technology) [NRF-2013R1A2A2A01015202]
A resistive and capacitive (RC) microwave absorber with a layer thickness less than a quarter of a wavelength is investigated based on closed-form design equations, which are derived from the equivalent circuit of the RC absorber. The RC absorber is shown to have a theoretical 90% absorption bandwidth of 93% when the electrical layer thickness is 57(circle) (about. lambda(0)/6). The trade-offs between the layer thickness and the absorption bandwidth are also elucidated. The presented formulation is validated by a design example at 3 GHz. The RC absorber is realized using a silver nanowire resistive rectangular structure with surrounding gaps. The measured 90% absorption bandwidth with a layer thickness of. lambda(0)/8 is 76% from 2.3 to 5.1 GHz in accordance with the theory and EM simulations. The presented design methodology is scalable to other frequencies.
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