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Related Experiment Video

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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Dynamic metasurface with absorption/transmission switching function.

Hao Yang, Yongfeng Li, Lixin Jiang

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    |November 11, 2025
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel reconfigurable metasurface that dynamically switches between high transmission and broadband absorption states. This technology enhances stealth applications by overcoming limitations of traditional frequency selective rasorbers.

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    Area of Science:

    • Electromagnetic Metamaterials
    • Stealth Technology
    • Applied Electromagnetics

    Background:

    • Frequency selective rasorbers (FSRs) are crucial for stealth applications but their passbands can limit radar cross-section reduction.
    • Existing reconfigurable rasorbers often only switch between transmission and reflection modes.

    Purpose of the Study:

    • To propose and demonstrate a novel electrically reconfigurable metasurface.
    • To achieve a dynamic functional transformation between broadband transmission and absorption states.

    Main Methods:

    • Design of a metasurface integrating a functional impedance layer and an active frequency-selective surface (FSS).
    • Incorporation of tunable resistive elements for absorption control.
    • Modulation of active elements in the FSS for functional switching.
    • Analysis using equivalent circuit models and surface current distributions.

    Main Results:

    • Demonstrated efficient transmission (insertion loss < -1 dB) from 9.3 to 10.9 GHz when inactive.
    • Achieved broadband absorption (8.1-12.3 GHz) with high efficiency when active.
    • Validated the design concept through prototype fabrication and measurements.

    Conclusions:

    • The proposed metasurface successfully achieves a dynamic transmission-to-absorption functional transformation over a wide bandwidth.
    • This technology offers enhanced performance for stealth applications compared to conventional FSRs.