Measurements and Modeling of Depolarization Characteristics From Rough Surfaces At Sub-THz Band for Indoor Short-Range Communications

The polarization characteristics of electromagnetic waves in the channel are crucial for radio transmission technology. In this paper, the depolarization properties of building materials in the Sub-THz band are investigated. Firstly, a depolarization modeling assisted by Mie scattering models is proposed. Secondly, the depolarization characteristics of four building materials at 129.5-135GHz are investigated by experimental measurements. Finally, the material depolarization characteristics in the Sub-THz band are comprehensively analyzed in terms of depolarization coefficients and cross polarization discrimination ratios. The results show that the material depolarization characteristics at Sub-THz have obvious incident angle, material type and frequency dependence. The results in this paper provide valuable data sets and depolarization propagation model for communication research in the Sub-THz band.