TITLE:
Determination of Material Properties like Permittivity and Density with Microwaves
AUTHORS:
Christoph Sklarczyk
KEYWORDS:
Nondestructive, Microwaves, Permittivity, Density, Sensor
JOURNAL NAME:
Journal of Modern Physics,
Vol.5 No.6,
April
18,
2014
ABSTRACT: With the
help of electromagnetic waves in deci-, centi- and millimeter-wave range
(microwaves) it is possible to determine the properties of non-metallic objects
like permittivity or density in a nondestructive and if necessary in a contactless
way. Depending on the type of the test object the measurement can be carried
out both with low-cost narrowband or more expensive wideband devices and
sensors. To get the characteristic value in most cases it is necessary to
calibrate the test device with the help of reference materials. It is
recommendable to sustain a constant distance (lift-off or standoff) between the
antenna of the sensor and the test object. The paper deals with the
characterization of asphalt, especially the determination of its density.