Debye Frequency-extended Waveguide Permittivity Extraction for High Complex Permittivity Materials. Concrete Setting Process Characterization

A waveguide with central frequency 868 MHz is used in the transmission/reflection operation regime to accurately measure the behavior of the complex permittivity of high complex permittivity granular materials, and it has been frequency-extended up to 3 GHz using the Debye fit relaxation model. It is shown that for highly granular high permittivity materials, a waveguide-based transmission/reflect...