Study of Midfield Wireless Power Transfer for Implantable Medical Devices

Keerthi., K.S; Ilango, K.; Nair, Manjula G.

doi:10.1109/ibiomed.2018.8534820

Cited by 16 publications

(16 citation statements)

References 17 publications

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“…In Figure 30 , the current density and generated magnetic fields are compared for a traditional coil source (NRIC) as shown in Figure 30 a,b and an optimal NRRMF source, Figure 30 c,d [ 48 , 154 ]. The effect of an optimal source results in a focusing effect of the magnetic field component and power flow, as shown in Figure 30 d, which is responsible for higher PTE.…”

Section: Mid-field Wptmentioning

confidence: 99%

“…Radio frequency (RF) modeling, different frequency bands and a brief study on the RF implantable device testing inside phantoms, ex vivo and in vivo were presented in [47]. The mid-field WPT for implantable systems was analyzed in [48] and its powering method for cardiac implants was demonstrated. In [49,50], the possibility and few applications of WPT for capsule endoscopy were demonstrated.…”

Section: Introductionmentioning

confidence: 99%

“…Current density and magnetic field distribution for a coil source (a,b) and optimal source (c,d) at 2.6 GHz[48,154]. The magnetic field component aligned with the receiver dipole moment and the Poynting vector (white lines) generated by the coil source and the optimal source.…”

mentioning

confidence: 99%

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Wireless Power Transfer Techniques for Implantable Medical Devices: A Review

Khan

Pavuluri

Cummins

et al. 2020

Sensors

220

109

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Wireless power transfer (WPT) systems have become increasingly suitable solutions for the electrical powering of advanced multifunctional micro-electronic devices such as those found in current biomedical implants. The design and implementation of high power transfer efficiency WPT systems are, however, challenging. The size of the WPT system, the separation distance between the outside environment and location of the implanted medical device inside the body, the operating frequency and tissue safety due to power dissipation are key parameters to consider in the design of WPT systems. This article provides a systematic review of the wide range of WPT systems that have been investigated over the last two decades to improve overall system performance. The various strategies implemented to transfer wireless power in implantable medical devices (IMDs) were reviewed, which includes capacitive coupling, inductive coupling, magnetic resonance coupling and, more recently, acoustic and optical powering methods. The strengths and limitations of all these techniques are benchmarked against each other and particular emphasis is placed on comparing the implanted receiver size, the WPT distance, power transfer efficiency and tissue safety presented by the resulting systems. Necessary improvements and trends of each WPT techniques are also indicated per specific IMD.

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Section: Mid-field Wptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wireless Power Transfer Techniques for Implantable Medical Devices: A Review

Khan

Pavuluri

Cummins

et al. 2020

Sensors

220

109

View full text Add to dashboard Cite

show abstract

“…In the near‐field power transfer, RF microwaves, whose wavelength is much longer than the distance between the transceivers (typically around a few MHz), were considered to operate the link. [ 121,122 ] The efficiency of near‐field power transfer depends on the dimension of RX, which is comparable to the distance between RX and TX. However, if the dimension of RX is smaller than the distance between RX and TX, the inductive coupling between TX and RX becomes very weak, regardless of multiple turns in the RX coils.…”

Section: Wireless Poweringmentioning

confidence: 99%

“…The human tissue becomes suddenly lossy beyond a certain frequency (a few GHz). [ 122 ] Hence, it was expected that a sweet spot for the operating frequency should exist to transfer power efficiently to the small RX.…”

Section: Wireless Poweringmentioning

confidence: 99%

Wireless Power Transfer and Telemetry for Implantable Bioelectronics

Yoo

Lee

Joo

et al. 2021

Adv Healthcare Materials

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Implantable bioelectronic devices are becoming useful and prospective solutions for various diseases owing to their ability to monitor or manipulate body functions. However, conventional implantable devices (e.g., pacemaker and neurostimulator) are still bulky and rigid, which is mostly due to the energy storage component. In addition to mechanical mismatch between the bulky and rigid implantable device and the soft human tissue, another significant drawback is that the entire device should be surgically replaced once the initially stored energy is exhausted. Besides, retrieving physiological information across a closed epidermis is a tricky procedure. However, wireless interfaces for power and data transfer utilizing radio frequency (RF) microwave offer a promising solution for resolving such issues. While the RF interfacing devices for power and data transfer are extensively investigated and developed using conventional electronics, their application to implantable bioelectronics is still a challenge owing to the constraints and requirements of in vivo environments, such as mechanical softness, small module size, tissue attenuation, and biocompatibility. This work elucidates the recent advances in RF‐based power transfer and telemetry for implantable bioelectronics to tackle such challenges.

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The WEAF Mnecosystem: a perspective of MEMS/NEMS technologies as pillars of future 6G, tactile internet and super-IoT

Iannacci

2021

Microsyst Technol

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Study of Midfield Wireless Power Transfer for Implantable Medical Devices

Cited by 16 publications

References 17 publications

Wireless Power Transfer Techniques for Implantable Medical Devices: A Review

Wireless Power Transfer Techniques for Implantable Medical Devices: A Review

Wireless Power Transfer and Telemetry for Implantable Bioelectronics

The WEAF Mnecosystem: a perspective of MEMS/NEMS technologies as pillars of future 6G, tactile internet and super-IoT

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