2 April 2008 Fabrication and electromagnetic characteristics of microwave absorbers containing carbon nanofibers and magnetic metals
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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.
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Ki-Yeon Park, Ki-Yeon Park, Jae-Hung Han, Jae-Hung Han, Sang-Bok Lee, Sang-Bok Lee, Jin-Bong Kim, Jin-Bong Kim, Jin-Woo Yi, Jin-Woo Yi, Sang-Kwan Lee, Sang-Kwan Lee, } "Fabrication and electromagnetic characteristics of microwave absorbers containing carbon nanofibers and magnetic metals", Proc. SPIE 6929, Behavior and Mechanics of Multifunctional and Composite Materials 2008, 69292G (2 April 2008); doi: 10.1117/12.776142; https://doi.org/10.1117/12.776142
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