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.