NDLI: Measurement of conductivity of carbon fibers at microwave frequencies

Content Provider	IEEE Xplore Digital Library
Author	Gona, S. Tomasek, P. Kresalek, V.
Copyright Year	2013
Description	Author affiliation: Dept. of Electron. & Meas., Tomas Bata Univ. in Zlin, Zlin, Czech Republic (Gona, S.; Tomasek, P.; Kresalek, V.)
Abstract	The paper presents results of measurements conductivity of carbon fibers from DC to 13 GHz. The measurements were performed on the microstrip measurement line, where a section of the line is made from a flat tow of carbon fibers. Physical conductivity of carbon fibers is derived from the measured value of S21 of the section of microstrip line in two steps. First, a tow of fibers is replaced by a homogenous material having an unknown effective conductivity. Then S21 of the section of the microstrip line having metallization made from the effective media is analyzed by 3D fullwave simulation program for a range of effective conductivities. The actual effective conductivity is found iteratively to match the measured and simulated S21 coefficients. Second, S21 of the planar slab having the effective conductivity obtained in the first step is calculated analytically. Then the slab is assumed to have a real microstructure with densely packed carbon fibers. The physical conductivity of the fibers is found iteratively by a local optimization technique, to match the analytical value of S21 and S21 obtained by the fullwave FEM simulation for the slab with carbon fibers.
Sponsorship	IEEE Czechoslovakia Sect.
Starting Page	68
Ending Page	71
File Size	1031423
Page Count	4
File Format	PDF
ISBN	9781467355162
e-ISBN	9781467355193
DOI	10.1109/RadioElek.2013.6530892
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-04-16
Publisher Place	Czech Republic
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microwave measurement microwave measurements transmission line measurements Conductivity Conductivity measurement Transmission line measurements Frequency measurement Microstrip Carbon fullwave electromagnetic modeling
Content Type	Text
Resource Type	Article

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