On Ka-Band Utilization Towards Non-Terrestrial Networks

In the context of the fifth generation (5G) and beyond wireless systems, non-terrestrial networks (NTNs) are expected to play a crucial role in supporting ubiquitous connectivity and ensuring service availability, reliability, and responsiveness. In the deployed NTNs, the Ka-band is extensively utilized to support the growing demand for high-speed and high-capacity communications. This work aims to illustrate the utilization of the Ka-band for consideration in the design of spectral-efficient NTNs. First, we provide an extensive overview of NTNs, with a specific emphasis on joint spectrum management within these networks. Then, we present the current utilization of the Ka-band in various systems, such as satellite and terrestrial systems. Finally, we discuss technical challenges in deploying NTNs with the Kaband and explore potential solutions to address these challenges.