Application of short circuit waveguide method for evaluation of inhomogenities in dielectric sample

In the paper main consideration is paid to investigation of inhomogenities in dielectric sample from the standpoint of their impedance properties and reflected signal amplitude. Such application include inspecting modern materials such as composites, detecting and characterizing surface and volume flaws, and evaluating the compressive strength of cement structures.The paper deals with measurement of reflex coefficient in dependence on crack depth on dielectric samples on microwave frequencies from the X –band. Evaluations are made by means of quantities used in microwave technique. Obtained quantities are compared with each other and also with analogous to the quantities measured at the same conditions on metal sample