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    Time Reversed Electromagnetic Wave Propagation as a Novel Method of Wireless Power Transfer

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    No. of downloads: 48

    Date
    2016-05
    Author
    Cangialosi, Frank
    Challa, Anu
    Furman, Tim
    Grover, Tyler
    Healey, Patrick
    Philip, Ben
    Roman, Scott
    Simon, Andrew
    Tabatabai, Alex
    Tao, Liangcheng
    Advisor
    Anlage, Steven
    DRUM DOI
    https://doi.org/10.13016/M2F77R
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    Abstract
    We investigate the application of time-reversed electromagnetic wave propagation to transmit energy in a wireless power transmission system. “Time reversal” is a signal focusing method that exploits the time reversal invariance of the lossless wave equation to direct signals onto a single point inside a complex scattering environment. In this work, we explore the properties of time reversed microwave pulses in a low-loss ray-chaotic chamber. We measure the spatial profile of the collapsing wavefront around the target antenna, and demonstrate that time reversal can be used to transfer energy to a receiver in motion. We demonstrate how nonlinear elements can be controlled to selectively focus on one target out of a group. Finally, we discuss the design of a rectenna for use in a time reversal system. We explore the implication of these results, and how they may be applied in future technologies.
    URI
    http://hdl.handle.net/1903/18077
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