Measurements of Reflection and Penetration Loss in Indoor Environments in the 39-GHz Band

This paper presents measurements for reflection and penetration loss of building materials in the 39-GHz band. Measurements were conducted onsite of an interior wall in a conference room. Assuming the measured interior wall as an infinite homogeneous single-layer slab, the relative permittivity was estimated based on the measurements using the least-squares fitting. The measured material was found similar reflectivity but less transmissivity than the plasterboard given in the ITU standards. The measurement results provide insights into electromagnetic (EM) properties of building materials in the 39-GHz band, which can be employed in future indoor radio propagation predictions.