Microwave nondestructive testing of dielectric materials

Abstract

The article focuses on measurements on pertinax and polyethylene samples to obtain their material characteristics by means of microwave investigation. Evaluation of the results is performed and accuracy possibilities are discussed. The influence of free holes and longitudinal cracks in pertinax on the reflected microwave signal is investigated. Also in the same way holes in teflon sample filled with the metal powder are irradiated with microwaves and the reflected signal is followed up. The measuring results are plotted in graphs. Also some comparisons of NDT methods are given.