Time-Domain Free-Field Measurements of the Relative Permittivity of Building Materials
Chriss A. Grosvenor, Robert Johnk, James R. Baker-Jarvis, Michael D. Janezic, Billy F. Riddle
Free-field measurements were made on several materials using dual-ridged guide antennas and 1 m x 1 m samples placed on an optical table loaded with absorber. The samples were polycarbonate, gypsum, plywood, a brick wall, and a concrete wall. This paper will discuss the use of time-gating to isolate a samples front and back surfaces to obtain the measured reflection and transmission coefficients. Theoretical reflection and transmission equations are generated from a plane wave model. Relative permittivity is obtained by varying the parameters in the Cole-Davidson equation until a best fit between the theoretical and measured reflection coefficients is obtained.
IEEE Transactions on Instrumentation and Measurement
, Johnk, R.
, Baker-Jarvis, J.
, Janezic, M.
and Riddle, B.
Time-Domain Free-Field Measurements of the Relative Permittivity of Building Materials, IEEE Transactions on Instrumentation and Measurement, [online], https://doi.org/10.1109/TIM.2009.2013916
(Accessed February 24, 2024)