Method for Estimating the Frequency Dependence of the Materials Permittivity with a Crystal Structure on SHF Band

A method for estimating the frequency dependence of the permittivity, suitable for studying objects with different crystal lattices, is described. A control example of the permittivity estimation for quartz (SiO2) and other materials such as lithium niobate (LiNbO3), potassium titanyl phosphate (KTiOPO4) and zinc germanium diphosphide (ZnGeP2) in the frequency range from 10 MHz to 25 GHz at room temperature 293 K is given. The layout for the measurement is a coplanar strip transmission line with an object placed on top for research. The proposed method for estimating the relative permittivity of materials is based on the processing of experimental phase shift data and their comparison with the frequency dependence of the phase shift obtained as a result of mathematical modeling. The obtained values of permittivity are close to those given in the literature. The advantage of the described method is the possibility of determining the dielectric constant in a wide range of microwave frequencies, as well as its possible introduction into measuring devices as a software option.