Modeling and Measuring the Shielding Effectiveness of Carbon Fiber Composites

We provide a model able to predict the shielding effectiveness (SE) of carbon fiber composite (CFC) panels made of stacked layers of conducting fibers. This model permits us to obtain simple formulas in which the only parameters needed are the sheet square resistance and the effective panel thicknes...

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Bibliographic Details
Published in:IEEE journal on multiscale and multiphysics computational techniques 2019-12, Vol.4, p.207-213
Main Authors: Diaz Angulo, Luis Manuel, de Francisco, Patricia Gomez, Gallardo, Borja Plaza, Martinez, David Poyatos, Cabello, Miguel Ruiz, Bocanegra, David Escot, Garcia, Salvador G.
Format: Article
Language:English
Subjects:
Carbon
Carbon fiber composites (CFC)
Carbon fibers
Conductivity
Electromagnetic compatibility
electromagnetic compatibility (EMC)
Electromagnetic shielding
Fiber composites
Impedance
Modelling
Resistance
shielding effectiveness (SE)
thin-layer modeling
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Summary:We provide a model able to predict the shielding effectiveness (SE) of carbon fiber composite (CFC) panels made of stacked layers of conducting fibers. This model permits us to obtain simple formulas in which the only parameters needed are the sheet square resistance and the effective panel thickness. These tools let us predict a minimum SE, which always increases with the frequency and therefore constituting the worst case, from an electromagnetic shielding perspective. Consequently, the measurement of minimum SE requirements can be simply measured with a micro-ohmmeter using an specific experimental setup which is also described here. Additionally, this method allows to measure very high SE falling far beyond the dynamic range of the values measurable with the most commonly used standard, the ASTM D4935. After describing the modeling technique and the different test setups used, across-validation between theoretical and experimental results is made for four different samples of CFC; two designed to test the modeling assumptions and two which are representative of the ones nowadays used in a real aircraft.
ISSN:2379-8815
2379-8815
DOI:10.1109/JMMCT.2019.2949592