Permittiyity ε and loss tangent tanδ of glass plastics and their components used for antenna covers were investigated in the 30–350 GHz band.

For glass plastics and their component testing in the frequency range 10-75 GHz we have used panoramic network analyzers R-2-61, R-2-65, R-2-68, R-2-69 with special horns. The measurements in the frequency range 75–350 GHz were carried out with help quasioptical beam wavequide spectrometers, interferometers, and open resonators [1].