A Wireless Network of 8.8mm3 Bio-Implants Featuring Adaptive Magnetoelectric Power and Multi-Access Bidirectional Telemetry

Zhanghao Yu, Wei Wang, Joshua C. Chen, Zhiyu Chen, Yan He, Amanda Singer, Jacob T. Robinson, Kaiyuan Yang
June 2022
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Abstract

This paper presents a hardware platform for wireless mm-sized bio-implant networks, exploiting adaptive magnetoelectric power transfer and novel schemes for efficient bidirectional multi-access communication. The closed-loop power control mitigates power delivery fluctuations caused by distance and alignment change and avoids redundant power of the external transceiver. The system also enables simultaneous power and time-domain modulated downlink data with a 5% peak power transfer efficiency and a 62.3-kbps maximum data rate at 340-kHz carrier frequency; multi-access uplink of all the implants enabled by individually programmed IF with a 40-kbps maximum data rate at 31-MHz carrier frequency; and more than 6-cm distance between the implant and the external TRX

Type
Conference paper
Publication
2022 IEEE Radio Frequency Integrated Circuits Symposium (RFIC)
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Zhanghao Yu
PhD 2023, now at Intel
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Wei Wang
Ph.D. Student (started in 2021)
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Zhiyu Chen
PhD 2023, now at Apple
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Yan He
PhD 2023, now at Nvidia
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Kaiyuan Yang
Associate Professor of ECE