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Phase-Continuous Reconfigurable Transmissive Metasurface without Air Gaps
Bingquan Xu1,2, Guiqiong Huang3, XiaoBing Feng2,4
1School of Electronic Science and Engineering (School of Microelectronics), South China Normal University, Foshan 528225, China.
ACS Applied Materials & Interfaces
|August 10, 2025
Summary
This study introduces a novel, air-gap-free reconfigurable transmissive metasurface. It offers superior phase-tunable resolution, advancing metasurface technology for wireless communication and imaging.
Area of Science:
- Electromagnetics and Metamaterials
- Applied Physics
Background:
- Conventional reconfigurable transmissive metasurfaces often feature air gaps, complicating design and limiting performance.
- Existing air-gap-free metasurface designs exhibit suboptimal phase-tunable resolution.
Purpose of the Study:
- To present a phase-continuous reconfigurable transmissive metasurface without air gaps.
- To achieve high phase-tunable resolution and efficient signal modulation.
Main Methods:
- Utilized Huygens' surface theory for design.
- Incorporated a multilayer interconnected meta-unit with integrated varactors.
- Controlled magnetic resonance characteristics for Huygens' resonance.
Main Results:
- Achieved 224° continuous phase modulation at 6.7 GHz.
- Demonstrated average transmittance of 0.7 from 6.7-7 GHz.
- Obtained a phase-tunable resolution of approximately 1°/0.1 V.
Conclusions:
- The proposed metasurface exhibits excellent phase-continuous dynamic reconfigurable capabilities.
- Experimental validation includes beam steering, real-time dynamic focusing, and simultaneous dual focusing.
- This advancement supports next-generation wireless communication and intelligent imaging.
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