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Updated: Jan 5, 2026

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
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Ultrasonic Lamb Waves for Wireless Power Transfer.

Victor Farm-Guoo Tseng, Sarah S Bedair, Joshua J Radice

    IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
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    Summary
    This summary is machine-generated.

    Wireless power transfer using ultrasonic guided plate waves (Lamb waves) achieved 56% efficiency over 204 mm. This method bypasses electromagnetic shielding issues in metal plates for efficient long-distance power delivery.

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    Area of Science:

    • Materials Science
    • Mechanical Engineering
    • Electrical Engineering

    Background:

    • Wireless power transfer (WPT) is often hindered by electromagnetic shielding in metal structures.
    • Ultrasonic guided plate waves, specifically Lamb waves, offer a potential solution for WPT through metal plates.
    • Piezoelectric transducers are key components for generating and receiving these acoustic waves.

    Purpose of the Study:

    • To conduct a fundamental study on the performance of Lamb wave-based wireless power transfer.
    • To model, simulate, and experimentally verify the efficiency and characteristics of Lamb wave WPT.
    • To investigate practical implementation factors for bonding transducers and grounding the plate.

    Main Methods:

    • Utilized Macro-Fiber Composite (MFC), d33-mode, piezoelectric transducers bonded to an aluminum plate.
    • Performed modeling and simulations to predict power transfer efficiency.
    • Conducted experimental verification, including load impedance matching and transducer sizing analysis.

    Main Results:

    • Achieved a power transfer of 0.47 W with 56% overall efficiency at a 204-mm distance.
    • Simulated and measured frequency responses for power transfer efficiency showed good agreement.
    • Identified that maximum efficiency locations correlate with the zero-order symmetrical (S0) Lamb wave mode patterns.

    Conclusions:

    • Lamb wave-based WPT is a viable method for efficient, long-distance power transfer through metal plates.
    • Transducer bonding methods and electrical grounding significantly impact practical WPT system performance.
    • The study provides a foundation for optimizing Lamb wave WPT systems for various applications.