Дослідження резонансів товщини у методі Ніколсона-Роса-Вейра

Abstract

This work is devoted to research of thickness resonances in the Nicholson Ross-Weir method. The Nicholson-Ross-Weir (NRW) method uses S-parameters to determine the complex dielectric and magnetic permittivities of materials. The thickness resonances in this method can occur at certain frequencies when a sample placed in a waveguide becomes resonant, which manifests itself as peaks or dips in the S-parameter plots. The resonances are related to the sample size (thickness) and its dielectric permittivity, which coincide with the conditions for the emergence of standing waves in the material. At resonant frequencies, the NRW algorithm can give errors or gaps in the dielectric permittivity values.