A Self-Adaptive Reconfigurable Metasurface for Electromagnetic Wave Sensing and Dynamic Reflection Control

Area of Science:

• Metasurface technology
• Electromagnetics
• Wave manipulation

Background:

• Reconfigurable metasurfaces are gaining attention.
• Existing metasurfaces require manual intervention, external sensors, or complex deep learning for functionality switching.
• These limitations hinder real-time applications and increase costs.

Purpose of the Study:

• To develop a simple, real-time self-adaptive metasurface.
• To integrate wave sensing and reconfigurable reflection capabilities.
• To eliminate the need for auxiliary detection or external controllers.

Main Methods:

• Designed a metasurface integrating sensing and reconfigurable reflection meta-atoms.
• Employed a phase comparator and lookup table for autonomous control.
• Investigated metasurfaces for adaptive wave redirection and focusing.

Main Results:

• Demonstrated effective reflection of incident waves from any direction within ±50° to the normal.
• Achieved rapid self-adaptation to changing incidence angles (up to 12°/s).
• Reported low power consumption (415 mW) and significant savings in response time, energy, and fabrication cost.

Conclusions:

• The proposed metasurface offers an autonomous, computationally simple, cost-effective, and energy-efficient solution for real-time adaptive reflection control.
• This technology opens new possibilities for wireless communication, radar sensing, and related fields.
• The system eliminates the need for external controllers and complex processing, enabling practical real-world deployment.