A study of the wireless systems used in clinical devices, in order to gain physics-based insights that can be translated into solutions for currently unmet challenges. These solutions are validated in human-scale computational models and large animal experiments to demonstrate their clinical applicability.
Selected publications: (Yang et al., 2019; Agrawal et al., 2017)
References
2019
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Enhancing Wireless Transmission from the Body with Wearable Diffractive Patterns
Fengyuan Yang, Lee Pui Mun, Dong Zhenya, and 2 more authors
Physical Review Applied, Nov 2019
doi:10.1103/PhysRevApplied.12.054020 url:https://doi.org/10.1103/PhysRevApplied.12.054020
2017
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Conformal phased surfaces for wireless powering of bioelectronic microdevices
Devansh R. Agrawal, Yuji Tanabe, Desen Weng, and 11 more authors
Nature Biomedical Engineering, Mar 2017
Wireless powering could enable the long-term operation of advanced bioelectronic devices within the human body. Although both enhanced powering depth and device miniaturization can be achieved by shaping the field pattern within the body, existing electromagnetic structures do not provide the spatial phase control required to synthesize such patterns. Here, we describe the design and operation of conformal electromagnetic structures, termed phased surfaces, that interface with non-planar body surfaces and optimally modulate the phase response to enhance the performance of wireless powering. We demonstrate that the phased surfaces can wirelessly transfer energy across anatomically heterogeneous tissues in large animal models, powering miniaturized semiconductor devices (<12 mm3) deep within the body (>4 cm). As an illustration of in vivo operation, we wirelessly regulated cardiac rhythm by powering miniaturized stimulators at multiple endocardial sites in a porcine animal model. A phased electromagnetic surface that conforms to the body surface can regulate cardiac rhythm in a porcine model through the wireless transmission of power to miniaturized semiconductor devices implanted at depths of over 4 cm.