Av. Mamishev et al., Development and applications of fringing electric field dielectrometry sensors and parameter estimation algorithms, J ELECTROST, 46(2-3), 1999, pp. 109-123
Recent advances in the field of interdigital w - k (frequency-wavenumber) d
ielectrometry are described. The paper offers an overview of several applic
ations of this technology developed during the last few years. Interdigital
w-k dielectrometry offers the ability to non-destructively measure from on
e side dielectric permittivity, conductivity and related physical propertie
s distributed spatially throughout the volume of dielectric materials. A se
parate mapping may be required to translate the distribution of the complex
dielectric permittivity into the distribution of other properties, which i
nclude moisture concentration, impurity concentration, density, porosity, t
hickness of films, structural integrity, surface coatings, etc. As represen
tative examples of applications of this technology, the results of the meas
urement of moisture diffusion into a 1.5 mm thick oil-free transformer pres
sboard are presented, followed by an illustrative case of spectroscopy-base
d landmine detection.