Measurement and modeling of propagation losses in brick and concrete walls for the 900-MHz band

Abstract

The prediction of wall losses is a fundamental aspect in the planning of cellular systems. The broad variety of building materials and construction codes makes accurate attenuation prediction very difficult without the support of specific construction data or measurements. In this paper, the attenuation and equivalent electric parameters and of brick and doubly reinforced concrete walls are estimated for the 900-MHz band by fitting simple ray tracing models to empirical transmission data. The measurement setup is described, and extensive experimental results justifying the quasioptical modeling are presented.

Item level characterization of mm-wave indoor propagation

“…In agreement with previous studies [4], results confirm that mm-waves undergo higher attenuation with respect to lower frequencies; for example, the comparison between the value in Table 2 and the results shown in [22] suggests that brick wall penetration loss may increase up to a factor 5 if the frequency is moved from 1 to 70 GHz. The PC monitor, probably due to some inner metallic layers and/or components, produces the heaviest obstruction.…”

Optimum Wireless Power Transmission for Sensors Embedded in Concrete

“…MHz band using measurements and MoM simulations in [76]. The effects of oblique incidence angels were particularly studied by this work.…”

“…Previous work in [74][75][76][77] has used fixed concrete permittivity and conductivity values. Our work implements the extended Debye model into our simulations in order to accurately describe the EM properties of concrete at different humidity conditions.…”

Optimization of Wireless Power Transfer via Magnetic Resonance in Different Media

“…The propagation losses in brick and concrete walls were studied at 900 MHz band using measurements and MoM simulations in [115]. Optimal frequencies for propagation in plain and reinforced concrete slab were identified in [116] for far field applications for various concrete thicknesses, rebar diameters and incident angles.…”