Enhancing Satellite Communications Connectivity with Reconfigurable Intelligent Surfaces : Reflection Link Optimization

Abstract

The emergence of Reconfigurable Intelligent Surfaces (RIS) technology has revolutionized modern communication systems by enhancing coverage and enabling higher data transmission rates. Recent research studies have investigated the integration of RIS into satellite networks, opening new avenues for improved performance and quality of service. However, a critical research gap has emerged with respect to the implementation of RIS in satellite communications connectivity scenarios and particularly in the reflection link's side. In this paper, We study GEO satellite networks at frequencies below 10GHz and a method is presented to optimize RIS position and orientation, with a view to maximizing the received power ratio from the reflection link compared to the direct link is presented. Additionally, we explore the placement of RIS in the far field and the radiating near field (Fresnel zone) of RIS, considering the impact of the number of RIS elements on the overall process.