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A method for determining the dielectric parameters of light internal wall materials at millimetre-wave frequencies is presented. The method is based on transmission coefficient measurement of a wall sample consisting of two slabs, the distance of which is variable. The dielectric parameters of the slabs can be determined by finding the parameter values which yield the minimum difference between measured and calculated transmission coefficient values. The results for plasterboard and chipboard walls are in line with the results given previously in the literature.
Lähteenmäki et al. (Thu,) studied this question.
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