A wireless power transmission system with load regulation for implantable devices

Li, Dawei; Zhou, Yang; Cui, Yongqiang; Huang, Sijia; Deng, Dongqin

doi:10.1109/mim.2020.9126074

Cited by 8 publications

(7 citation statements)

References 12 publications

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Section: Introductionmentioning

confidence: 99%

“…Implantable medical devices (IMDs) are used for monitoring physiological signs, therapeutic functions, and the treatment of chronic diseases [1][2][3][4]. According to [3,4], in 2019, about 10-million people worldwide depended on implantable cardiac pacemakers, and this number has grown by about 15% per year. Most IMDs use built-in batteries for their operation, and for fully IMDs, the battery replacement is performed through a surgical procedure [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…According to [3,4], in 2019, about 10-million people worldwide depended on implantable cardiac pacemakers, and this number has grown by about 15% per year. Most IMDs use built-in batteries for their operation, and for fully IMDs, the battery replacement is performed through a surgical procedure [1][2][3][4]. Battery replacement through a surgical procedure has the potential for infection and generates patient anxiety, and during battery replacement, the IMD must be turned off [1].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Differential-Evolution-Assisted Optimization of Classical Compensation Topologies for 1 W Current-Fed IMD Wireless Charging Systems

de Jesus,

Tolfo,

Godoy

et al. 2023

Applied Sciences

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Implantable medical devices (IMDs) necessitate a consistent energy supply, commonly sourced from an embedded battery. However, given the finite lifespan of batteries, periodic replacement becomes imperative. This paper addresses the challenge by introducing a wireless power transfer system designed specifically for implantable medical devices (IMDs). It begins with a detailed analysis of the four conventional topologies. Following this, the paper provides a thorough explanation for choosing the PS topology, highlighting its advantages and suitability for the intended application. The primary parallel capacitance necessitates power from current sources; thus, a Class-E amplifier was implemented. Additionally, the selected circuit was engineered to deliver 1 W at the biocompatible resonance frequency of 13.56 MHz. The delineation of the resonance parameters hinges on multifaceted solutions, encompassing bifurcation-free operation and the attainment of peak efficiency. To ensure the feasibility of the proposed solution, a Differential-Evolution-based algorithm was employed. The results obtained from simulation-based evaluations indicated that the system achieved an efficiency exceeding 86%. This efficiency level was maintained even in the face of frequency fluctuations and variations in the coupling between the coils, thereby ensuring stable operational performance. This aligns seamlessly with the specified application prerequisites, guaranteeing a feasible and reliable operation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Differential-Evolution-Assisted Optimization of Classical Compensation Topologies for 1 W Current-Fed IMD Wireless Charging Systems

de Jesus,

Tolfo,

Godoy

et al. 2023

Applied Sciences

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“…Due to increasing calls for several submissions like health monitoring, electrical vehicle charging, sensors, implantable devices, and smart home systems, quick advancements have been made in the elds of wireless power transfer (WPT) and RF energy harvesting (RFEH) technology [1]- [9]. WPT schemes consist of a transmitter system and a receiver system.…”

Section: Introductionmentioning

confidence: 99%

A Broadband Rectenna for RF Energy Harvesting from Low Power Levels

Ojha

Tomar

Akashe

et al. 2023

Preprint

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In the article, a broadband rectenna is proposed that can harvest energy from low input power levels. A broadband rectenna is designed that can operate between 1.4 GHz and 2.8 GHz with a bandwidth of 1.4 GHz. The proposed rectenna covers two important bands, i.e., GSM 1800 MHz and ISM 2450 MHz. The antenna consists of an antenna and a rectifier. A hexagonal patch antenna is designed with a defective ground structure that can operate from 1.4 GHz to 2.8 GHz. For rectification purposes, the HSMS2850 Schottky diode is used. To achieve good conversion efficiency, a matching circuit (a combination of bandpass and high-pass section) is designed. Maximum simulated conversion efficiencies achieved at 1.8 GHz with a load resistance of 1.3 kΩ are 21%, 36.3%, 51.2%, 63.7%, and 73.4% at power levels of -20 dBm, -15 dBm, -10 dBm, -5 dBm, and 0 dBm, respectively. Simulated conversion efficiency achieved at 2.45 GHz with a load resistance of 2 kΩ is 22.5%, 35%, 46%, 57.2%, and 68.5% at power levels of -20 dBm, -15 dBm, -10 dBm, -5 dBm, and 0 dBm, respectively. With an optimum load of 2 kΩ and IPLs of -20 dBm, -15 dBm, -10 dBm, -5 dBm, and 0 dBm, the measured conversion efficiencies at 1.8 GHz are 22%, 36%, 51.5%, 65%, and 66.4%, respectively, and at 2.45 GHz they are 22%, 36%, 46%, 57%, and 67%, respectively.

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“…Wireless power transfer (WPT) technology is developing rapidly with the increasing requirements for applications such as smart home systems, health monitoring, electric vehicle charging, implantable electronic devices, and sensors [1][2][3][4][5][6][7][8]. Delivering wireless energy makes these systems more compact and intuitive to users.…”

Section: Introductionmentioning

confidence: 99%

Extendable Array Rectenna for a Microwave Wireless Power Transfer System

et al. 2021

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A rectenna is adopted in a microwave-based wireless power transfer system to rectify the received RF to DC power. Each rectenna includes a DC-DC converter at the DC output port to ensure a stable power supply and a Schottky diode for the DC-combining network. The results demonstrate that the RF-DC conversion efficiencies of the rectifier circuit and 4 × 1 rectenna were 71% and 71.2% when the unit-cell RF input level was 19 dBm and 19.6 dBm. The DC output levels of a 4 × 8 rectenna with and without the DC-DC converter were 28 V and 30 V when the unit-cell RF input level was 20.2 dBm. The RF-DC conversion efficiency was measured as 52.6% and 59.9% with and without the DC-DC converter, respectively. The Schottky diode combined with the D-DC C converter at the DC output port exhibits an increase in the DC power combining level, making it suitable for an extendable array rectenna system.

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A wireless power transmission system with load regulation for implantable devices

Cited by 8 publications

References 12 publications

Differential-Evolution-Assisted Optimization of Classical Compensation Topologies for 1 W Current-Fed IMD Wireless Charging Systems

Differential-Evolution-Assisted Optimization of Classical Compensation Topologies for 1 W Current-Fed IMD Wireless Charging Systems

A Broadband Rectenna for RF Energy Harvesting from Low Power Levels

Extendable Array Rectenna for a Microwave Wireless Power Transfer System

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