Wireless Power Delivery to Flexible Subcutaneous Implants Using Capacitive Coupling

Jegadeesan, R.; Agarwal, Kush; Guo, Yong‐Xin; Yen, Shih Cheng; Thakor, Nitish V.

doi:10.1109/tmtt.2016.2615623

Cited by 131 publications

(68 citation statements)

References 31 publications

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“…Furthermore, IMDs can suffer from a large size due to the size of capacitor patches. Hence, it is primarily used for near-surface transcutaneous implant communication and not BIMDs [87].…”

Section: Wireless Power and Communication Linksmentioning

confidence: 99%

Compact Implantable Antennas for Cerebrospinal Fluid Monitoring

Manoufali

Bialkowski

Mohammed

et al. 2019

IEEE Trans. Antennas Propagat.

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“…Furthermore, IMDs can suffer from a large size due to the size of capacitor patches. Hence, it is primarily used for near-surface transcutaneous implant communication and not BIMDs [87].…”

Section: Wireless Power and Communication Linksmentioning

confidence: 99%

Compact Implantable Antennas for Cerebrospinal Fluid Monitoring

Manoufali

Bialkowski

Mohammed

et al. 2019

IEEE Trans. Antennas Propagat.

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“…However, for the precise modelling, the conductor loss resistance is considered in series with the tissue resistance to determine the equivalent resistance. Hence, the CCWPT module equivalent circuit can be modeled by considering the equivalent resistance (RT), lead wires, and plate self-inductance (Lself), as well as the equivalent capacitance between the plates (Ceq) [7]. The equivalent circuit model of the CCWPT module is shown in Figure 2b.…”

Section: Capacitive Coupled Wptmentioning

confidence: 99%

Class E Power Amplifier Design and Optimization for the Capacitive Coupled Wireless Power Transfer System in Biomedical Implants

et al. 2017

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Abstract:The capacitive coupled wireless power transfer (CCWPT) operating at megahertz (MHz) frequency is broadly considered as the promising solution for low power biomedical implants. The class E power amplifier is attractive in MHz range wireless power transfer (WPT) applications due to zero voltage switching (ZVS) and zero voltage derivative switching (ZVDS) properties. The existing design of class E amplifier is investigated only for inductive resonant coupled (IRC) WPT systems; the modelling and optimization of the class E amplifier for CCWPT systems are not deliberated with load variation. Meanwhile, the variations in the coupling distance and load are common in real time applications, which could reduce the power amplifier (PA) efficiency. The purpose of this paper is to model and optimize the class E amplifier for CCWPT systems used in MHz range applications. The analytical model of PA parameters and efficiency are derived to determine the optimal operating conditions. Also, an inductive-capacitive-inductive (LCL) impedance matching network is designed for the robust operation of the PA, which improves the efficiency and maintains required impedance compression. The maximum efficiency of the proposed design reached up to 96.34% at 13.56 MHz and the experimental results are closely matched with the simulation.

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“…The authors of Reference [1] presented a slot-patch flexible antenna working at 434 MHz, used as an implant for animals and ingestible for humans. In Reference [2], the authors present a near-field capacitive coupling to transfer 100 mW wirelessly to a flexible power receiver. However, using a capacitive coupled powering scheme needs to be investigated for long term subcutaneous implant applications to limit its harmful effect.…”

Section: Introductionmentioning

confidence: 99%

Study of Rotation and Bending Effects on a Flexible Hybrid Implanted Power Transfer and Wireless Antenna System

Shadid

Haerinia

Noghanian

2020

Sensors

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We present rotational misalignment and bending effects on a hybrid system to transfer power and data wirelessly for an implantable device. The proposed system consists of a high-frequency coil (13.56 MHz) to transfer power and an ultra-high frequency antenna (905 MHz) for data communication. The system performance and the transmitted power were studied under two misalignment conditions: (1) receiver rotation around itself with reference to the transmitter, and (2) bending of the implanted receiver under three different radii. Implanted receiver was printed on a flexible Kapton substrate and placed inside a layered body tissue model at a 30 mm depth. It is shown that the inductive link is stable under rotational misalignment and three bending conditions, whereas the communication data link is suitable to be used if the rotation angle is less than 75° or larger than 150°. The results show that the resonance frequency varies by 1.6%, 11.05%, and 6.62% for the bending radii of 120 mm, 80 mm, and 40 mm, respectively. Moreover, transmission efficiency varies by 4.3% for the bending radius of 120 mm. Decreasing the bending radius has more effects on antenna transmission efficiency that may cause severe losses in the communication link.

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Wireless Power Delivery to Flexible Subcutaneous Implants Using Capacitive Coupling

Cited by 131 publications

References 31 publications

Compact Implantable Antennas for Cerebrospinal Fluid Monitoring

Compact Implantable Antennas for Cerebrospinal Fluid Monitoring

Class E Power Amplifier Design and Optimization for the Capacitive Coupled Wireless Power Transfer System in Biomedical Implants

Study of Rotation and Bending Effects on a Flexible Hybrid Implanted Power Transfer and Wireless Antenna System

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