Browsing by Author "Furman, Tim"
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Item Time Reversed Electromagnetic Wave Propagation as a Novel Method of Wireless Power Transfer(2016-05) Cangialosi, Frank; Challa, Anu; Furman, Tim; Grover, Tyler; Healey, Patrick; Philip, Ben; Roman, Scott; Simon, Andrew; Tabatabai, Alex; Tao, Liangcheng; Anlage, StevenWe 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.