The Method for Measuring the Permittivity to Assess the Influence of External Factors

A transmission line measurement method for measuring the permittivity of a material when exposed to chemically aggressive media is presented. The estimation of the measurement error of the permittivity for a sample with known parameters is carried out. The reference permittivity is measured with the resonance method. It is shown that after the influence of an external chemically aggressive environment on the material, a change in its electrodynamic parameters is observed. The measured material has a permittivity close to the reference sample. The resulting change in the dielectric constant exceeds the calculated value of the error, which allows us to conclude about the accuracy of the measurements.