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A One-Bit Programmable Multi-Functional Metasurface for Microwave Beam Shaping
Wu Zhang1, Jiahan Lin1, Zitao Zheng1
1School of Physics and Material Science, Guangzhou University, Guangzhou 510006, China.
Micromachines
|November 25, 2023
Summary
This study presents a programmable metasurface capable of microwave beam shaping. This 1-bit-coded device offers flexible control for applications in imaging, transmission, and sensing.
Area of Science:
- Electromagnetics
- Materials Science
Background:
- Metasurfaces offer advanced control over electromagnetic waves.
- Programmable metasurfaces are crucial for dynamic beam-shaping applications.
Purpose of the Study:
- To demonstrate a multi-functional, programmable metasurface for microwave beam shaping.
- To achieve flexible control over microwave beams using a 1-bit-coded metasurface.
Main Methods:
- The metasurface comprises an array of programmable unit cells, each with a varactor diode.
- By controlling the electrical bias of the varactor diodes, a 0 to π phase shift is achieved at 6.2 GHz, enabling 1-bit coding.
- Experimental demonstration of beam generation including single-focus, double-focus, and focused vortex beams.
Main Results:
- The 1-bit-coded metasurface successfully generated single-focus, double-focus, and focused vortex beams.
- Tunable focal lengths (54 mm, 103 mm, 152 mm) were experimentally achieved for the single-focus beam at 5.7 GHz.
- The metasurface exhibited robust and flexible beam-shaping capabilities.
Conclusions:
- The developed programmable metasurface provides a versatile platform for advanced microwave applications.
- Its flexible beam-shaping ability is suitable for microwave imaging, information transmission, and sensing.
