Affiliations: [a] Department of Industrial Engineering (DII), University of Padova, Padova, Italy | [b] Department of Materials Engineering (DME), KU Leuven, Leuven, Belgium
Correspondence:
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Corresponding author: Alvise Maschio, Department of Industrial Engineering, University of Padova, via Gradenigo 6/a, I-35131 Padova, Italy. Tel.: +39 04 982 775 35; Fax: +39 04 982 775 99; E-mail:alvise.maschio@dii.unipd.it
Abstract: Shielding effectiveness measurement, up to the GHz range,
of construction materials with different compositions is an important issue.
In this paper a coaxial waveguide, originally developed for thin films, is
proposed as a simple device able to perform measurements on test samples
with a thickness of a few millimetres. A calibration of the test system,
with length extended of 5 mm, has been done both with a theoretical
evaluation and an experimental measurement. Data obtained with construction
materials of current interest for research are presented. With respect to
similar systems reported in literature, where data up to 1.5 GHz are shown,
this system has proven to be appropriate for measurements up to 3 GHz
without too stringent tolerances in the sample geometry and without contact
problems. Moreover, with inorganic polymers test samples, a clear relation
between shielding effectiveness and heating temperature of the material has
been observed.
Keywords: Coaxial waveguide, construction materials, shielding effectiveness
