Measurements of the Transmission Coefficient of Samples of New Materials in the Sub-terahertz Band of Frequencies

The propagation of radiation in the frequency range 0.2–0.3 THz through samples of composite materials is considered. The samples are in the form of a strip of carbon fibers stacked into tapes impregnated with epoxide resin on in the form of a block of randomly arranged quartz filaments bonded with borosilicate glass. It is shown that the results of measurements performed in the terahertz range of frequencies may be used to study the structural parameters and for the purpose of flaw detection in composite materials.