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http://dx.doi.org/10.5139/JKSAS.2005.33.11.024

Fabrication and Design of Multi-Layered Radar Absorbing Structures of MWNT-Filled Glass/Epoxy Plain-Weave Composites  

Lee, Sang-Eui (한국과학기술원 항공우주공학전공 대학원)
Kang, Ji-Ho (한국과학기술원 항공우주공학전공 대학원)
Kim, Chun-Gon (한국과학기술원 항공우주공학전공)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.33, no.11, 2005 , pp. 24-32 More about this Journal
Abstract
The object of this study is to design radar absorbing structures(RAS) with load-bearing ability in X-band. Glass/Epoxy plain-weave composites of excellent specific stiffness and strength, containing multi-walled carbon nanotubes(MWNT) added to induce dielectric loss were fabricated. The observation of microstructure and the permittivity of the composites confirmed that the materials are suitable to be used for radar absorbing material. Genetic algorithm and theory for reflection/transmission of electromagnetic waves in a multi-layered RAS were applied to conduct an optimal design of a RAS composed of the developed composites. We observed that the thickness per ply changes with the number of ply and MWNT contents. The fabrication process was proposed considering the problem and applied to fabricate a designed RAS and the theoretical and measured reflection loss of the RAS were also found in good agreement.
Keywords
X-band frequency; Permittivity; Radar absorbing structure; Multi-walled carbon nanotube;
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