Porosity Inversion of Multilayer Medium at THz Frequency

The porosity of ceramic materials and composites is a key determinant of their overall characteristics. Material porosity might represent material preparation quality and performance. In this paper, we present an inversion approach for porosity in layered media based on the dyadic Green's function method in multilayer layered media. This study presents a layered media porosity inversion method based on dyadic Green's function. The multilayer dyadic Green function approach is used to calculate electromagnetic dispersion in space. Subsequently, the DBIM inversion method was used to achieve the inversion of the relative dielectric constant of multi-layer ceramic layers. Finally, we utilized the Maxwell-Garnett effective medium theory model to analyze the porosity of the medium. The method proposed in this article can be used to analyze material properties in non-destructive testing of layered media.