Transmission loss evaluation for Fabry-Perot materials’ characterization

The knowledge of the electromagnetic properties of construction materials is crucial for the design of future wireless systems and for the practical use of deterministic ray based propagation prediction tools. More specifically, with the allocation of several new frequency bands for 5G and beyond systems, the understanding of the electromagnetic properties of materials at those frequencies is needed to determine attenuation and reflectivity of walls and objects. In this work, a wideband method for the characterization of the imaginary part of the complex permittivity is presented; the method is intended to be combined with the recently proposed Fabry-Perot method to measure the permittivity’s real part. Paraffin is selected as a reference material since it has long been used to assess methods in the literature.