A Fast Modelling-Based Technique for the Characterization of Graphene-Based Polymer Composites

This work is dedicated to a non-destructive technique that allows modeling-based extraction of the surface resistance, resistivity and conductivity maps of graphene-based polymer composites. The technique is based on the use of a 10 GHz inverted Single-Post Dielectric Resonator (iSiPDR) incorporated into a 2D scanner. Retro-modeling is then applied to convert the measured microwave signal parameters to material characteristics. Retro-modeling requires the actual modeling to be performed may times, over a grid of parameters (material parameters and sample dimensions), and therefore, an ultra-fast conformal FDTD Bodies-of-Revolution (BoR) formulation of the FDTD method is utilized here. The maps of material parameters allow non-destructive testing of the developed composites and will be used for their assessment for different applications, such as electromagnetic shielding.