High-frequency electromagnetic non-destructive evaluation for high spatial resolution, using metamaterials
High-frequency electromagnetic non-destructive evaluation for high spatial resolution, using metamaterials
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DOI：
10.1098/rspa.2011.0666
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发表时间：
2012-10-08
影响因子：
3.5
通讯作者：
Tian, Gui-Yun
中科院分区：
文献类型：
--
作者：
Grimberg, Raimond;Tian, Gui-Yun
This study presents a new high-frequency electromagnetic method for a non-destructive evaluation of metallic strip gratings from printed circuit boards and of some carbon-fibre-reinforced plastic composites, allowing the detection of small defects. The electromagnetic transducer is based on a metamaterial lens realized with two conical Swiss rolls, that allows the transmission and intensification of purely evanescent modes generated in the slits of metallic strip gratings and in the dielectric that insulate the carbon fibres between them. The method and the transducer used allow the localization of metallic strip interruptions whose widths are greater than 0.2 mm, the non-alignment of carbon fibres, the breaking of carbon fibres, the lack of resin or delaminations due to impact at low energies, with spatial resolution being greater than 0.1 mm.
