Comparative study of the Teflon® electromagnetic parameters (permittivity and permeability) experimentally obtained and numerically simulated

The present report branches out into two related topics. The first is concerned with the implementation of a computational modeling to predict the behavior of electromagnetic materials in confined environment by using electromagnetic three-dimensional simulation. The second topic re-examines the Nicolson-Ross-Weir mathematical model to retrieve the constitutive parameters (complex permittivity and permeability) of a Teflon^® sample from the measurement of scattering coefficients. Recognizing the importance of this issue for the development of radar absorbing materials (RAMs), the present study contributes for the characterization of electromagnetic materials and, consequently, for the processing of RAMs in the microwave range.