研究目的
To propose and verify the concept of an infrared-controlled programmable metasurface that can be programmed remotely, solving the problem of complex connecting wires when contactless remote-control is required.
研究成果
The study successfully proposed and verified the concept of an infrared-controlled programmable metasurface, demonstrating that the scattering beam of the metasurface can be reconstructed remotely using infrared ray. This approach solves the problem of complex connecting wires for contactless remote-control, opening up new avenues for constructing remotely-tuning dynamic metasurfaces.
研究不足
The current experiment directly uses infrared ray to wirelessly switch different coding sequences pre-stored in FPGA, which simplifies the control circuit but may limit the flexibility of coding sequence changes. The complexity and cost of the device were reduced, but this approach may not fully exploit the potential of software-driven infrared transceiver modules with more sophisticated control programs.
1:Experimental Design and Method Selection:
The study designed a digital metasurface element capable of achieving a 180° phase difference in the operating frequency band. The metasurface was constructed using these elements and controlled by an infrared transceiver module.
2:Sample Selection and Data Sources:
The metasurface sample was fabricated using standard printed circuit board (PCB) technology and machine welding procedure.
3:List of Experimental Equipment and Materials:
The experiment used an F5 infrared emission tube as the transmitter, a four-wire infrared receiving module as the receiver, and a 'Skyworks SMV1405-079LF' varactor.
4:Experimental Procedures and Operational Workflow:
The infrared-controlled programmable metasurface was measured in an anechoic chamber, with the infrared transmitter and receiver placed
5:0 m apart. Data Analysis Methods:
The far-field patterns of the metasurface were recorded and analyzed to verify the beam-splitting and beam-scanning performance.
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