Design and simulation of reconfigurable intelligent surfaces for potential novel tuning-based method implementations

Abstract

The sub-Terahertz and mid-band, crucial for 6G development, offer substantial bandwidth and ultra-short wavelengths. However, propagation losses and signal blockages pose challenges in achieving the features of high-speed data transmissions and high-accuracy sensing capability. This thesis proposes employing reconfigurable intelligent surfaces (RISs) to mitigate these issues. RISs dynamically manipulate incident waves in the desired direction, enhancing transmission without bulky RF chains. This study delves into RIS design and optimization for potential implementation using innovative tuning methods such as microfluidics and phase-change materials. Through full-wave simulation in CST, this research designs RIS structures operating at the sub-THz and mid-band that are then assessed for their integration feasibility with novel tuning technologies. The tuning technologies include microfluidics for the sub-THz band and phase change materials for the mid-band. This research aims to pave the way for efficient sub-THz communication in future 6G networks.