Improved Fabry‐Pérot Electromagnetic Material Characterization: Application and Results

Abstract

While several mm-wave and sub-THz frequency bands are being proposed for next generation wireless systems to meet the increasing traffic demand, the electromagnetic properties of many common use materials at those frequencies still need to be determined. The evaluation of such properties is important for the design and deployment of future wireless networks. Recently, a simple method based on Fabry-Pérot resonance has been proposed to address the need of easy material characterization at mm-wave frequencies. In this study, the method has been improved and applied to the characterization of several materials at mm-wave and sub-THz frequencies, in order to assess its reliability, usability, and accuracy in practical cases. The method is shown to achieve a good accuracy level despite the very simple measurement setup and the great flexibility. However, some application limitations are highlighted and discussed in the paper. A method for electromagnetic material characterization based on an improved Fabry-Pérot technique is presented. Recently, a simple and fast method for the characterization of low-loss materials based on the Fabry-Pérot (FP) resonance that takes place inside a material slab has been proposed (Degli-Esposti et al., 2017).

Mm-Wave Building Penetration Losses: A Measurement-Based Critical Analysis

“…BEL can be extracted from measurement campaigns in different representative environments, see for example [3], [7]- [11]. Nevertheless, simple formula such as the one in [20] can be used to compute attenuation through a low-loss slab, if the effective material parameters (real and imaginary part of complex permittivity) of the wall are known at the considered frequencies. As stated in [17], if necessary, a proper fading description can be added to the foregoing formula, that only aims at providing mean O2I attenuation.…”

Wireless Channel Analysis Between 25 and 40 GHz in an Intra-Wagon Environment for 5G Using a Ray-Tracing Tool

“…The electromagnetic properties of the materials in the environment must be correctly assigned. Although several studies have estimated the electromagnetic properties of common materials for low mm-Wave bands [22], many materials have not been characterized yet. In this way, we have used the general equations for materials found in the ITU Recommendation P.1238-7 [23]; these equations are valid between 1-100 GHz, and they provide a good approximation of the electromagnetic properties.…”

5G to 6G: A Paradigm Shift in Radio Channel Modeling

“…Moreover, the exact knowledge of our living environment, for example, shapes of trees and leaves, layered wall structures and their dielectric constants is essential to know the attenuation during wave‐object interaction, but it isn't always available or accessible and hence left as a challenge. Therefore, a great deal of work is still needed to characterize the scattering properties of many construction materials for the several mm‐wave and sub‐THz frequencies that are being proposed for beyond‐5G wireless systems (Possenti et al., 2020; Zhang et al., 2020).…”