An Approach to Improve the Misalignment and Wireless Power Transfer into Biomedical Implants Using Meandered Wearable Loop Antenna

Kod Muayad; Zhou Jiafeng; Huang Yi; Hussein Muaad; Sohrab Abed P.; Song Chaoyun; Kod Muayad; Zhou Jiafeng; Huang Yi; Hussein Muaad; Sohrab Abed P.; Song Chaoyun

doi:10.1155/2021/6621899

2021 Volume 8

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An Approach to Improve the Misalignment and Wireless Power Transfer into Biomedical Implants Using Meandered Wearable Loop Antenna

1.
Electrical and Electronics Engineering, University of Kerbala, Kerbala, Iraq
2.
Electrical Engineering and Electronics, The University of Liverpool, Liverpool, UK
3.
Electrical Power Techniques Engineering, Southern Technical University, Basrah, Iraq
4.
James Watt School of Engineering, University of Glasgow, Glasgow, UK
5.
School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK

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Corresponding author: Jiafeng Zhou; jiafeng.zhou@liverpool.ac.uk

Wireless Power Transfer 8, Article number: 10.1155/2021/6621899 (2021) | Cite this article

Abstract

An approach to improve wireless power transfer (WPT) to implantable medical devices using loop antennas is presented. The antenna exhibits strong magnetic field and dense flux line distribution along two orthogonal axes by insetting the port inside the antenna area. This design shows excellent performance against misalignment in the y-direction and higher WPT as compared with a traditional square loop antenna. Two antennas were optimized based on this approach, one wearable and the other implantable. Both antennas work at both the ISM (Industrial, Scientific, and Medical) band of 433 MHz for WPT and the MedRadio (Medical Device Radiocommunications Service) band of 401–406 MHz for communications. To test the WPT for implantable medical devices, a miniaturized rectifier with a size of 10 mm × 5 mm was designed to integrate with the antenna to form an implantable rectenna. The power delivered to a load of 4.7 kΩ can be up to 1150 μW when 230 mW power is transmitted which is still under the safety limit. This design can be used to directly power a pacemaker, a nerve stimulation device, or a glucose measurement system which requires 70 μW, 100 μW, and 48 μW DC power, respectively.

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Kod M, Zhou J, Huang Y, Hussein M, Sohrab A P et al. 2021. An Approach to Improve the Misalignment and Wireless Power Transfer into Biomedical Implants Using Meandered Wearable Loop Antenna. Wireless Power Transfer 8: 6621899 doi: 10.1155/2021/6621899

Kod M, Zhou J, Huang Y, Hussein M, Sohrab A P et al. 2021. An Approach to Improve the Misalignment and Wireless Power Transfer into Biomedical Implants Using Meandered Wearable Loop Antenna. Wireless Power Transfer 8: 6621899 doi: 10.1155/2021/6621899

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An Approach to Improve the Misalignment and Wireless Power Transfer into Biomedical Implants Using Meandered Wearable Loop Antenna

1.
Electrical and Electronics Engineering, University of Kerbala, Kerbala, Iraq
2.
Electrical Engineering and Electronics, The University of Liverpool, Liverpool, UK
3.
Electrical Power Techniques Engineering, Southern Technical University, Basrah, Iraq
4.
James Watt School of Engineering, University of Glasgow, Glasgow, UK
5.
School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK

Corresponding author: Jiafeng Zhou; jiafeng.zhou@liverpool.ac.uk

Wireless Power Transfer 8, Article number: 10.1155/2021/6621899 (2021) | Cite this article

Abstract: An approach to improve wireless power transfer (WPT) to implantable medical devices using loop antennas is presented. The antenna exhibits strong magnetic field and dense flux line distribution along two orthogonal axes by insetting the port inside the antenna area. This design shows excellent performance against misalignment in the y-direction and higher WPT as compared with a traditional square loop antenna. Two antennas were optimized based on this approach, one wearable and the other implantable. Both antennas work at both the ISM (Industrial, Scientific, and Medical) band of 433 MHz for WPT and the MedRadio (Medical Device Radiocommunications Service) band of 401–406 MHz for communications. To test the WPT for implantable medical devices, a miniaturized rectifier with a size of 10 mm × 5 mm was designed to integrate with the antenna to form an implantable rectenna. The power delivered to a load of 4.7 kΩ can be up to 1150 μW when 230 mW power is transmitted which is still under the safety limit. This design can be used to directly power a pacemaker, a nerve stimulation device, or a glucose measurement system which requires 70 μW, 100 μW, and 48 μW DC power, respectively.

About this article

Cite this article

Kod M, Zhou J, Huang Y, Hussein M, Sohrab A P et al. 2021. An Approach to Improve the Misalignment and Wireless Power Transfer into Biomedical Implants Using Meandered Wearable Loop Antenna. Wireless Power Transfer 8: 6621899 doi: 10.1155/2021/6621899