Single-Layer High-Efficiency Metasurface for Multi-User Signal Enhancement.

Area of Science:

• Electromagnetic theory
• Metamaterials and Metasurfaces
• Wireless Communication Systems

Background:

• Wireless systems suffer from signal degradation due to fading and interference, limiting capacity.
• Existing signal enhancement methods often involve complex coordination and hardware.
• Passive metasurfaces offer a potential solution for efficient signal manipulation.

Purpose of the Study:

• To propose and demonstrate an electromagnetic focusing method using a single-layer passive metasurface.
• To enable multi-user signal enhancement in wireless communication systems.
• To reduce complexity and improve deployability compared to traditional methods.

Main Methods:

• Fabrication of a high-efficiency metasurface array using PCB technology with subwavelength units.
• Application of geometric phase principles for wide-range phase modulation and wavefront manipulation.
• Construction of a multi-user energy convergence model in the WiFi band.

Main Results:

• The metasurface successfully achieved collaborative wavefront manipulation for multiple target regions with high transmission efficiency.
• Simultaneous signal enhancement zones were created for multiple users in both controlled and real-world environments.
• Stable focusing capability and environmental adaptability were demonstrated.

Conclusions:

• The proposed single-layer passive metasurface provides an effective solution for signal optimization in multi-user wireless communication.
• This lightweight and low-complexity design facilitates deployment in dense indoor and IoT networks.
• The technology addresses limitations of traditional enhancement schemes, enhancing system capacity and performance.