Reflection Coefficient Measurement for House Flooring Materials at 57-64 GHz

In this paper, the reflection characteristics of the house flooring construction materials at millimeter-wave (MMW) frequencies are studied. Since this investigation is performed for North American housing, the 57-64 GHz frequency band is considered. In this study, three common flooring materials: hardwood, vinyl and carpet (cut- and loop-pile) are chosen. The reflection characteristics of the aforementioned materials are also measured when the supporting materials, i.e. plywood and underpad, exist. A continues wave (CW) transmit-receive measurement setup with measuring possibility of entire range of 57-64 GHz is employed. The reflection coefficient for all available incident angle and transmission loss for face-to-face antenna direction are measured for the chosen flooring materials. The relative permittivity associated to these materials based on the Fresnel's reflection formula are found. Moreover, the results reveal the frequency dependence of the flooring materials within 57-64 GHz.