1. Time-Domain Free-Field Measurements of the Relative Permittivity of Building Materials.
- Author
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Grosvenor, Chriss A., Johnk, Robert T., Baker-Jarvis, James, Janezic, Michael D., and Riddle, Bill
- Subjects
CONSTRUCTION materials ,DIELECTRICS ,ELECTRICAL engineering materials ,ANTENNAS (Electronics) ,POLYCARBONATES ,GYPSUM ,PLYWOOD ,DIGITAL signal processing ,FOURIER transform spectroscopy - Abstract
Time-domain free-field measurements comprised the dielectric properties of several common building materials using dual-ridged guide antennas and 1 m × 1 m samples placed on an optical table covered with an absorber. The samples are poly-carbonate, gypsum, plywood, a brick wall, and a concrete wall. Time gating and deconvolution are used to isolate a sample's front and back surfaces to obtain the measured reflection coefficients (RCs) and transmission coefficients. Theoretical reflection and transmission equations were generated from a plane-wave model. Relative permittivity is obtained by varying the parameters in the Kirkwood-Fuoss equation until a best fit between the theoretical and measured reflection and transmission coefficients is obtained. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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