Grosvenor, C.
, Johnk, R.
, Baker-Jarvis, J.
, Janezic, M.
and Riddle, B.
(2009),
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 March 14, 2025)
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Time-Domain Free-Field Measurements of the Relative Permittivity of Building Materials
Published
Author(s)
, Robert Johnk, , ,
Abstract
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.Citation
IEEE Transactions on Instrumentation and Measurement
Volume
58
Issue
7
Pub Type
Journals
Download Paper
Keywords
Antennas, Cole-Davidson equation, digital signal-processing, free-space measurements, relative permittivity
Citation
Issues
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Created June 10, 2009, Updated June 2, 2021