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Proceedings Paper

Fabrication and electromagnetic characteristics of microwave absorbers containing carbon nanofibers and magnetic metals
Author(s): Ki-Yeon Park; Jae-Hung Han; Sang-Bok Lee; Jin-Bong Kim; Jin-Woo Yi; Sang-Kwan Lee
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Paper Abstract

The ultimate aim of this study is the development of microwave absorbers containing both dielectric and magnetic lossy materials. Carbon nanofibers (CNFs) were used as dielectric lossy materials and NiFe particles were used as magnetic lossy materials. Total twelve specimens for the three types such as dielectric, magnetic and mixed radar absorbing materials (RAMs) were fabricated. Their complex permittivities and permeabilities in the range of 2~18 GHz were measured using the transmission line technique. The parametric studies in the X-band (8.2~12.4 GHz) for reflection loss characteristics of each specimen to design the single-layered RAMs were performed. The mixed RAMs generally showed the improved absorbing characteristics with thinner matching thickness. One of the mixed RAMs, S09 with the thickness of 2.00 mm had the 10 dB absorbing bandwidth of 4.0 GHz in the X-band. The experimental results for selected specimens were in very good agreements with simulation ones in terms of the overall reflection loss characteristics and 10 dB absorbing bandwidth.

Paper Details

Date Published: 2 April 2008
PDF: 10 pages
Proc. SPIE 6929, Behavior and Mechanics of Multifunctional and Composite Materials 2008, 69292G (2 April 2008); doi: 10.1117/12.776142
Show Author Affiliations
Ki-Yeon Park, Korea Advanced Institute of Science and Technology (South Korea)
Jae-Hung Han, Korea Advanced Institute of Science and Technology (South Korea)
Sang-Bok Lee, Korea Institute of Materials Science (South Korea)
Jin-Bong Kim, Korea Institute of Materials Science (South Korea)
Jin-Woo Yi, Korea Institute of Materials Science (South Korea)
Sang-Kwan Lee, Korea Institute of Materials Science (South Korea)


Published in SPIE Proceedings Vol. 6929:
Behavior and Mechanics of Multifunctional and Composite Materials 2008
Marcelo J. Dapino; Zoubeida Ounaies, Editor(s)

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