ENERGY TRANSFER FOR IMPLANTABLE ELECTRONICS IN THE ELECTROMAGNETIC MIDFIELD (Invited Paper)

Ho, John S.; Poon, Ada S. Y.

doi:10.2528/pier14070603

Cited by 16 publications

(8 citation statements)

References 29 publications

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“…To show that our design concept can generalize to planar microwave devices of greater complexity, we analyze and fabricate a midfield phased surface consisting of concentric metal rings integrated with rigid passive components ( Figure ). This device has been demonstrated as a viable means for focusing microwave energy transfer into the human body, in order to wirelessly power implanted biomedical devices . The device consists of concentric rings loaded with passive elements, which are used to engineer phases on the device surface.…”

Section: Fabrication and Analysis Of Stretchable Microwave Antenna Symentioning

confidence: 99%

A General Strategy for Stretchable Microwave Antenna Systems using Serpentine Mesh Layouts

Chang

Tanabe

Wojcik

et al. 2017

Adv Funct Materials

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Wireless functionality is essential for the implementation of wearable systems, but its adaptation in stretchable electronic systems has had limited success. In this paper, the electromagnetic properties of stretchable serpentine mesh-based systems is studied, and this general strategy is used to produce high-performance stretchable microwave systems. Stretchable mechanics are enabled by converting solid metallic sections in conventional systems to subwavelength-scale serpentine meshes, followed by bonding to an elastomeric substrate. Compared to prior implementations of serpentine meshes in microwave systems, this conversion process is extended to arbitrary planar layouts, including those containing curvilinear shapes. A detailed theoretical analysis is also performed and a natural tradeoff is quantified between the stretching mechanics and microwave performance of these systems. To explore the translation of these concepts from theory to experiment, two types of stretchable microwave devices are fabricated and characterized: a stretchable far-field dipole antenna for communications and a stretchable midfield phased surface for the wireless powering of biomedical implanted devices.

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Section: Fabrication and Analysis Of Stretchable Microwave Antenna Symentioning

confidence: 99%

A General Strategy for Stretchable Microwave Antenna Systems using Serpentine Mesh Layouts

Chang

Tanabe

Wojcik

et al. 2017

Adv Funct Materials

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“…Timeline of major milestones for implantable and ingestible electronic devices and technology for powering such devices. Listed are the years when batteries suitable to power biomedical devices were first commercialized, [63][64][65][66][67][68][69] in vivo experiments of energy harvesting and transfer devices first occurred, [70][71][72][73][74][75][76][77][78] ingestible electronics first appeared, [79,80] and implantable electronics first appeared. [81][82][83][84][85][86][87][88][89] (WPT: wireless power transfer, BFC: biofuel cell, PENG: piezoelectric nanogenerator, APT: acoustic power transfer, AWS: automatic wristwatch system, PV: photovoltaic, TENG: triboelectric nanogenerator).…”

Section: Structure and Components Of Biomedical Electronic Devicesmentioning

confidence: 99%

Powering Implantable and Ingestible Electronics

Yang

Sencadas

You

et al. 2021

Adv Funct Materials

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Implantable and ingestible biomedical electronic devices can be useful tools for detecting physiological and pathophysiological signals, and providing treatments that cannot be done externally. However, one major challenge in the development of these devices is the limited lifetime of their power sources. The state-of-the-art of powering technologies for implantable and ingestible electronics is reviewed here. The structure and power requirements of implantable and ingestible biomedical electronics are described to guide the development of powering technologies. These powering technologies include novel batteries that can be used as both power sources and for energy storage, devices that can harvest energy from the human body, and devices that can receive and operate with energy transferred from exogenous sources. Furthermore, potential sources of mechanical, chemical, and electromagnetic energy present around common target locations of implantable and ingestible electronics are thoroughly analyzed; energy harvesting and transfer methods befitting each energy source are also discussed. Developing power sources that are safe, compact, and have high volumetric energy densities is essential for realizing long-term in-body biomedical electronics and for enabling a new era of personalized healthcare.

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“…In which case (1) can be approximated by (2), to include the proof mass ∆ where ′2 = 2 �0.236/3, = 0.236 is the effective mass of the cantilever, and is the effective spring constant of the cantilever. 1,12 6 shows a large bimorph structure that will be used to experimentally validate the aforementioned design rules. Energy harvester performance can be predicted based on the dimensions, mass of the cantilevers, and proof mass.…”

Section: Fig 4 the First Three Undamped Natural Frequencies And Modmentioning

confidence: 99%

Electrostrictive polymers for mechanical-to-electrical energy harvesting

Kaval

Coutu

Lake

2016

2016 IEEE National Aerospace and Electronics Conference (NAECON) and Ohio Innovation Summit (OIS)

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ENERGY TRANSFER FOR IMPLANTABLE ELECTRONICS IN THE ELECTROMAGNETIC MIDFIELD (Invited Paper)

Cited by 16 publications

References 29 publications

A General Strategy for Stretchable Microwave Antenna Systems using Serpentine Mesh Layouts

A General Strategy for Stretchable Microwave Antenna Systems using Serpentine Mesh Layouts

Powering Implantable and Ingestible Electronics

Electrostrictive polymers for mechanical-to-electrical energy harvesting

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