期刊
IEEE TRANSACTIONS ON NANOTECHNOLOGY
卷 16, 期 3, 页码 484-490出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNANO.2017.2688415
关键词
Graphene absorber; transparent device; waveguide measurement
类别
资金
- National Science Foundation of China [61274110]
A patterned graphene-based transparent microwave absorber is proposed in this paper. Graphene is transferred onto polyethylene terephthalate (PET) film, and patterned as mu m-level periodic patches, so that a capacitive and resistive graphene surface is obtained at microwave band. By placing this graphene/PET film on the top of a glass substrate and applying fluorine-doped tin oxide film as the reflective layer, transparent absorber working at Ku band is realized. The optical transmittance of the fabricated graphene/PET film reaches around 80% in the whole optical light range, while the absorption coefficient reaches 90% at 12.6 GHz. By analyzing the parasitic effects in the rectangular waveguide measurement, a good agreement is obtained among the measurement, three-dimensional full-wave simulation, and the equivalent circuit. Two configurations are further analyzed to enhance the absorption level and the working bandwidth of the absorber. 100% absorption and 3 GHz bandwidth broadening are realized.
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