Millimeter Wave Material Measurements for Building Entry Loss Models Above 100 GHz

Shielding against electromagnetic interference (EMI) is a critical issue in civil applications generally solved with metal screens. In recent years, the properties of many composite materials filled with carbon nanotubes or graphene or materials with a carbon-based coating have been analysed with the aim of using them for electromagnetic shielding applications. Among other carbon materials, biochar, derived from biomass and characterized by high carbon content, emerges as a sustainable, renewable, environmentally friendly, and inexpensive material. In this paper, commercial biochar thermally treated at 750 °C is used to coat with several layers common building components such as drywall panel. Shielding effectiveness is measured in the frequency band 1–18 GHz for normal incidence and skew angles 10, 20 and 30 deg in a full anechoic chamber with double ridged, vertically and horizontally polarized broadband horn antennas. The results show that the proposed biochar-coated drywall panels provide a good shielding effectiveness compared to similar solutions, with the advantage of a less expensive and easier to realize building material

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“…The attenuation of common building materials have been investigated for low frequency [2] and more recently at millimetre waves [38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Shielding Effectiveness Measurements of Drywall Panel Coated with Biochar Layers

et al. 2022

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“…In addition to the increasing complexity of geometric models that is needed because of the shorter wavelength, THz communication and sensing systems usually aim at utilizing huge bandwidths demanding wideband material models as well [134]. Therefore, accurate ultra-wideband material characterization [135], i.e. determination of the relative permittivity as well as the material's loss tangent is necessary even before simulations can start.…”

Section: Thz Near-field and Multi-scale Simulationsmentioning

confidence: 99%

THz Measurements, Antennas, and Simulations: From the Past to the Future

et al. 2023

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In recent years, terahertz (THz) systems have become an increasingly popular area of research thanks to their unique properties such as extremely high data rates towards Tb/s, submillimeter localization accuracy, high resolution remote sensing of materials, and remarkable advances in photonics and electronics technologies. This article traces the progress of THz measurements, antennas and simulations, from historical milestones to the current state of research and provides an outlook on the remaining challenges.INDEX TERMS Channel modeling, history, MTT 70th anniversary special issue, on-chip antennas, raytracing, THz communications, THz measurements and simulations.This article has been accepted for inclusion in a future issue of this journal. Content is final as presented, with the exception of pagination. This article has been accepted for inclusion in a future issue of this journal. Content is final as presented, with the exception of pagination.

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Measurements and Characterization of Reflection and Transmission Propagation of LOW-E Glass for mmWave Communications in Smart Buildings

Liao,

Lin,

Wang

et al. 2023

2023 IEEE 11th Asia-Pacific Conference on Antennas and Propagation (APCAP)

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Millimeter Wave Material Measurements for Building Entry Loss Models Above 100 GHz

Cited by 7 publications

References 12 publications

Shielding Effectiveness Measurements of Drywall Panel Coated with Biochar Layers

Shielding Effectiveness Measurements of Drywall Panel Coated with Biochar Layers

THz Measurements, Antennas, and Simulations: From the Past to the Future

Measurements and Characterization of Reflection and Transmission Propagation of LOW-E Glass for mmWave Communications in Smart Buildings

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