Measuring the permittivity of concrete at millimeter waves
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Abstract
There are numerous methods to determine material permittivity at millimeter waves. Often, special instrumentation is necessary. Also, it is recommended to use two or more methods to obtain reliable results.
The presented method uses a very simple instrumentation: a generator and a detector, and employs the evaluation of a standing wave which is created by the normal incidence to the air-to-material boundary. The results obtained by this and the more sophisticated method using a polarimetric scatterometer were found very close to each other and actually the presented method gives more accurate results.
Keywords
Accurate Result Standing Wave Normal Incidence Sophisticated Method Special Instrumentation
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© Plenum Publishing Corporation 1996