K. Sato

TL;DR: In this article, a computer simulation was made to clarify the polarization dependence of the high-speed transmission characteristics of an indoor communications system operating at 60 GHz in a room within a modern office building.

TL;DR: In this paper, the reflection and transmission coefficients of typical walls, floor, ceiling, window, and partitions were measured at 57.5 GHz and compared with the reflection characteristics estimated by multilayer dielectric models.

TL;DR: The authors measured the reflection characteristics of materials with inhomogeneous structures or rough surfaces, and found that the specular reflection from a concrete plate and a floorboard can be reduced significantly by covering them with carpet tiles with rough surfaces.

TL;DR: In this paper, the authors measured the complex refractive index of concrete at 57.5 GHz by the combined use of free-space reflection and transmission methods and showed that the reflection coefficient of a concrete plate is less dependent on water content.

TL;DR: It is shown that the use of circular polarization can reduce the reflection even if the interior parts of the structure have complicated structures and the overall trend of reflection coefficients calculated by multi-layer dielectric models mainly agrees well with the trend of the measurements.