some part of mm-wave bands on spectrum sharing basis for 5G satellite and 5G terrestrial network segments [14]. Table 7.2 shows the basic frequency bands allocated to fixed and mobile satellite services, sited within the band from 10.7 to 275 GHz, designed for satellite networks and satisfying the needs for 5G channel bandwidths [25, 31]. Typical frequency bands as Ka-band (28 GHz) and Q/V-bands (37-53 GHz) are listed, and it should be noticed that while Ka-band has a large tradition for satellite use, the V-band has not been used yet for satellite applications [31]. In this sense, WRC-19 pointed out some restrictions to apply to the different platforms [14]: HAPS base stations: Concern about interference in passive Earth observation operations in the band adjacent to 24 GHz was one of the most controversial topics at the WRC-19 conference. As a solution, the ITU established power limits SO that 5G base stations are required to comply with the following power limits in the 24 GHz band: - 33 dBW/200 MHz before and then -39 BW/200 MHz after 2027. However, the meteorologist community that relies on passive Earth observation may not be satisfied with the compromise and considers that power limits do not adequately protect atmospheric water vapor sensors. On the other hand, lower-than-requested power limits will likely increase the number of base stations required to achieve 5G wide area coverage in the band. High-altitude platform systems (HAPS): Balloons, unmanned aircraft systems (UAS), and other HAPS technologies received assignments that will allow them to provide connectivity from altitudes between where the terrestrial and satellite networks operate. The ITU identified the following frequency bands for HAPS use: Global (31-31.3 GHz, 38-39.5 GHz, 47.2-47.5 GHz, and 47.9-48.2 GHz) and Region 2 (America) (21.4-22 GHz and 24.25-27.5 GHz). Satellites in geostationary satellite orbit (GSO): Earth stations in motion (ESIM) can now communicate with GSO satellites in the Ka-band (17.7-19.7 GHz and 27.5-29.5 GHz) and sat