Measurement of Glass Complex Permittivity at 200-500 GHz for THz Propagation Simulation

Terahertz (THz) band wireless link is promising candidate for the 6G mobile communication standard. However, there are a few experimental data on the reflectance and transmittance characteristics of building materials, such as glass, at the 300GHz band, which is necessary for THz-band radio wave propagation simulation. In this paper, we measured the complex permittivity of glasses at 200-500 GHz by using terahertz time-domain spectroscopy (THz-TDS) and vector network analyzer (VNA), and compared these results. We conducted 300-GHz-band outdoor radio wave propagation simulation by using the measured complex permittivity of the glass.