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Measurement of Conductivity of Carbon Fibers at Microwave Frequencies

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dc.title Measurement of Conductivity of Carbon Fibers at Microwave Frequencies en
dc.contributor.author Goňa, Stanislav
dc.contributor.author Tomášek, Pavel
dc.contributor.author Křesálek, Vojtěch
dc.relation.ispartof 2013 23rd International Conference Radioelektronika (Radioelektronika)
dc.identifier.issn 978-1-4673-5516-2 Scopus Sources, Sherpa/RoMEO, JCR
dc.identifier.issn 978-1-4673-5517-9 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2013
dc.citation.spage 68
dc.citation.epage 71
dc.event.title 23rd International Conference on Radioelektronika
dc.event.location Pardubice
utb.event.state-en Czech Republic
utb.event.state-cs Česká republika
dc.event.sdate 2013-04-16
dc.event.edate 2013-04-17
dc.type conferenceObject
dc.language.iso en
dc.publisher The Institute of Electrical and Electronics Engineers (IEEE) en
dc.identifier.doi 10.1109/RadioElek.2013.6530892
dc.relation.uri http://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&arnumber=6530892
dc.subject Conductivity en
dc.subject transmission line measurements en
dc.subject fullwave electromagnetic modeling en
dc.subject microwave measurements en
dc.description.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. en
utb.faculty Faculty of Applied Informatics
dc.identifier.uri http://hdl.handle.net/10563/1003583
utb.identifier.obdid 43870394
utb.identifier.scopus 2-s2.0-84888377993
utb.identifier.wok 000326877900011
utb.source d-wok
dc.date.accessioned 2013-12-30T12:31:13Z
dc.date.available 2013-12-30T12:31:13Z
utb.contributor.internalauthor Goňa, Stanislav
utb.contributor.internalauthor Tomášek, Pavel
utb.contributor.internalauthor Křesálek, Vojtěch
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