Conformal phased surfaces for wireless powering of bioelectronic microdevices
Conformal phased surfaces for wireless powering of bioelectronic microdevices
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DOI：
10.1038/s41551-017-0043
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发表时间：
2017-03-01
影响因子：
28.1
通讯作者：
Ho, John S.
中科院分区：
文献类型：
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作者：
Agrawal, Devansh R.;Tanabe, Yuji;Ho, John S.
无线供电可以使先进的生物电子设备在人体内长期运行。虽然增强的供电深度和设备小型化都可以通过在身体内成形场图案来实现，但是现有的电磁结构不提供合成这种图案所需的空间相位控制。在这里，我们描述了共形电磁结构的设计和操作，称为相控表面，与非平面的身体表面的接口和最佳调制的相位响应，以提高无线供电的性能。我们证明了相控表面可以在大型动物模型中通过解剖学异质组织无线传输能量，为小型化半导体器件（4 cm）供电。作为体内操作的说明，我们通过在猪动物模型中的多个内分泌部位为微型刺激器供电来无线调节心律。
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 (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.