Blood Glucose Monitoring and Communicative Implantable Chip Using a Wireless Power Transfer

Hyeon Keon Lee; Hong Hyeon Park; Sang Hoek Kim

Hyeon Keon Lee LIG Nex1
Hong Hyeon Park Silicon Mitus Inc.
Sang Hoek Kim Kyung Hee University

Keywords: Backscatter, Fluorescent, Implantable glucose sensor, WPT

Abstract

This work proposes a wireless operating system for continuous monitoring of glucose level. The system consists of an implantable device and an external readout transmitter. The implantable device measures a glucose level and wirelessly communicates with the external reader, employing the backscattered modulation for low-power operation. The implantable device converts the light intensity scattered from a fluorescent hydrogel sensor reacting on glucose level to the frequency-modulated signal, and sends this back to the external reader while it is being powered wirelessly. The entire implantable device including the 1000×600-um2 die fabricated in TSMC 180-nm CMOS process is bonded on PCB and the fluorescence hydrogel sensor fits in 2×2.5 mm2, and consumes 146.5 uW of power in average during the operation.

Author Biographies

Hyeon Keon Lee, LIG Nex1

Hyeonkeon Lee received the M.S. degrees in electrical engineering from Kyung Hee University, Seoul, Korea, in 2021. His research interest includes RF circuits and linear RF transmitters for wireless communications. Especially, he is currently conducting the research on RF Seeker at LIG Nex1 Co.

Hong Hyeon Park, Silicon Mitus Inc.

Honghyeon Park received the M.S. degrees in electrical engineering from Kyung Hee University, Seoul, Korea, in 2022. His research interest includes analog circuits and wireless power transfer. Especially, he is currently conducting the research on PMIC at Silicon Mitus Inc.

Sang Hoek Kim, Kyung Hee University

Sanghoek Kim received the B.S. degree with a double major in Electrical Engineering and Mathematical Science from Seoul National University, Korea, in 2007, and the M.S./Ph.D. degree in Electrical Engineering from Stanford University, USA, in 2013. He was the recipient of Stanford Fellowship and Kwanjeong Scholarship during the study. After the graduation, he has worked at Qualcomm Inc. as a signal/power integrity engineer and in SiBeam, Inc as a mmWave system engineer. In 2016, he joined the EE department of Kyung Hee University, where he is now an associate professor. In 2021, he received the Young Researcher Award from the Korean Institute of Electromagnetic Engineering and Science.
Currently, his research focuses on applications of radio-frequency technology and electromagnetics theory in wireless interface with bio-implantable devices, wireless power transfer, and radar technologies.

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