Reconfigurable Intelligent Surfaces Enhance Terahertz Signal Coverage in Single and Dual-Hop Hall Scenarios

Terahertz communication promises dramatically increased data rates for future wireless networks, but its short wavelength suffers from substantial signal loss, severely limiting its practical range. Ben Chen, Zhangdui Zhong, and colleagues at Beijing Jiaotong University, along with Ke Guan, Danping He, Yiran Wang, and Jianwen Ding, address this challenge by investigating how reconfigurable intelligent surfaces (RIS) can extend signal coverage. Their research demonstrates that strategically deploying these surfaces, which dynamically control electromagnetic waves, significantly improves indoor terahertz signal strength, even with complex, multi-surface configurations. This work establishes a detailed simulation framework, using a representative indoor hall, to provide valuable design guidance for optimising RIS-assisted terahertz communication and accurately estimating coverage in real-world environments. RIS Optimisation for Terahertz Communication Networks Terahertz (THz) communication offers the potential for ultra-high data rates in future wireless networks, but inherent signal loss significantly limits range. Reconfigurable intelligent surfaces (RIS), which dynamically control electromagnetic wave propagation, provide a promising solution to overcome this limitation and extend coverage.

This research investigates how RIS can enhance THz communication by mitigating signal loss and improving network performance through novel algorithms for beamforming and resource allocation. THz RIS Performance via Ray Tracing This research details the use of ray tracing simulations to analyse the performance of reconfigurable intelligent surfaces (RIS) in terahertz (THz) communication systems. The study focuses on how RIS can improve signal coverage in indoor environments, considering both single-hop and dual-hop deployments, and presents simulation results evaluating gains in signal strength and coverage. Ray tracing accurately models electromagnetic wave propagation by tracing individual rays, predicting signal strength in complex environments. THz Ray Tracing Models Indoor RIS Deployment Terahertz (THz) communication promises ultra-high data rates, but significant signal loss limits coverage. Researchers are investigating reconfigurable intelligent surfaces (RIS) to enhance THz signal propagation and extend coverage range. This work integrates an antenna array-based RIS model into a high-performance ray-tracing platform, CloudRT, to analyse multi-RIS deployment scenarios within an indoor hall environment. Simulations reveal significant signal attenuation in areas obstructed by pillars and walls, which strategically deployed RIS can effectively address.

The team established a detailed three-dimensional model of a hall, defining material properties at 332GHz. Simulations demonstrate that strategically deploying RIS can significantly improve signal strength in previously weak areas, with dual-hop configurations delivering enhanced coverage compared to single-hop. This work provides valuable insights for the practical deployment of THz RIS and signal coverage estimation in real-world indoor environments. RIS Enhance Terahertz Indoor Coverage Significantly This research demonstrates the potential of reconfigurable intelligent surfaces (RIS) to extend the coverage of terahertz (THz) communication systems. By integrating an antenna array-based RIS model into a ray-tracing simulation platform, scientists have investigated how strategically placed RIS can enhance indoor signal coverage. Results show that single-hop and dual-hop RIS configurations significantly improve received power in areas with weak or no direct signal paths, achieving gains of up to 20. 3 dB in specific regions. Optimal placement of RIS is crucial for maximising coverage enhancement, with strong gains observed when RIS align coverage in areas lacking a direct signal path. Deploying a second RIS, even with weaker radiation, further improves signal strength in challenging areas. These findings offer valuable insights for designing and optimising RIS-assisted THz communication systems for indoor environments, paving the way for ultra-high data rate wireless networks. 👉 More information 🗞 Terahertz Signal Coverage Enhancement in Hall Scenarios Based on Single-Hop and Dual-Hop Reconfigurable Intelligent Surfaces 🧠 ArXiv: https://arxiv.org/abs/2512.14394 Tags: Rohail T. As a quantum scientist exploring the frontiers of physics and technology. My work focuses on uncovering how quantum mechanics, computing, and emerging technologies are transforming our understanding of reality. I share research-driven insights that make complex ideas in quantum science clear, engaging, and relevant to the modern world. Latest Posts by Rohail T.: Hybrid Quantum-Classical Methods Enable Molecular Ground State Preparation Beyond Current Devices December 18, 2025 Taxi Destination Prediction Achieves Improved Accuracy with Hybrid Quantum-Classical Networks December 18, 2025 Single-photon Sources Unlock Secure Communication and Photonic Computing with Scalable Materials December 18, 2025