Study and Analysis Indoor Path Loss Models for Low-Terahertz mmWaves

Due to growing demand for data by subscribers of cellular networks and expected increases to dozens of times by the year 2030.Many research organizations in the field of cellular networks has motivated to search for a new frequency spectrum to confront this challenge in data and to reduce the time access.D-band is the low terahertz spectrum (110-170 GHz) which has very short wavelengths from 1.7 mm to 2.3 mm, and not been used in cellular communications and is expected to be proposed by the International Telecommunication Union (ITU) for next generation.In this paper, path loss models were studied and analyzed to the indoor environment (offices and shopping malls) at three points of frequencies within the D-band including the start band, the middle band, and the end of the band (110, 150, and 170) GHz.The study included a number of path loss models for both LOS and NLOS scenarios, including free space, 3GPP, 5GCM, mmMAGIC, METIS, and IEEE.