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High-frequency electromagnetic non-destructive evaluation for high spatial resolution, using metamaterials

Lookup NU author(s): Professor Raimond Grimberg, Professor Gui Yun TianORCiD


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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.

Publication metadata

Author(s): Grimberg R, Tian GY

Publication type: Article

Publication status: Published

Journal: Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences

Year: 2012

Volume: 468

Issue: 2146

Pages: 3080-3099

Print publication date: 30/05/2012

ISSN (print): 1364-5021

ISSN (electronic): 1471-2946

Publisher: The Royal Society Publishing


DOI: 10.1098/rspa.2011.0666


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Funder referenceFunder name
Royal Academy of Engineering (RAE)
PN 09 43 01 04Romanian Ministry of Education, Research, Youth and Sports
PNII-PT-PCCA-2011-3.1-234Romanian Ministry of Education, Research, Youth and Sports
PNII-PT-PCCA-2011-3.2-0905Romanian Ministry of Education, Research, Youth and Sports