Magnetoelectric Wireless Power Transfer Receivers for Sub-Millimeter Scale Implantable Bioelectronics
Abstract
Implanted biomedical devices for continuous physiological monitoring require reliable wireless power delivery to anatomically constrained and sensitive sites where batteries are impractical or hazardous. Existing wireless power transfer (WPT) modalities, including inductive coils and ultrasonic transducers suffer from performance degradation as receiver dimensions are miniaturized, limiting their application for space-limited locations such as fingertips, the ocular cavity, and intracranial sites. We present a microelectromechanical systems (MEMS) magnetoelectric WPT receiver integrating piezoelectric aluminum scandium nitride and magnetostrictive iron-cobalt/silver multilayer thin-films, microfabricated within a footprint of 770 x 360 x 2.25 micrometers. The receiver operates at its 100 kHz flexural-mode resonance with a quality factor of 1180 and delivers 1.0 microwatt to a matched 10 kohm load under a standard-compliant 205 micro-Tesla RMS excitation field. This device exhibits a magnetoelectric coefficient of 1274 V cm-1 Oe-1 and a power figure of merit (FOMP) of 4.05 x 10-3 mW cm-3 Oe-2 Hz-1, both the highest reported values of comparable magnetoelectric WPT receivers. The FOM is 20-fold higher than the next best comparable-frequency device. These miniaturized devices establish MEMS magnetoelectric transduction as a scalable platform for battery-free wireless powering of microwatt-class implants in the most anatomically demanding regions of the body.
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BibTeX
@misc{tan2026magnetoelectric,
title = {{Magnetoelectric Wireless Power Transfer Receivers for Sub-Millimeter Scale Implantable Bioelectronics}},
author = {Jonathan Tan and Serene Feng and Thomas Mion and Sydney Acosta and Konrad Bussmann and Peter Finkel and Roy Olsson},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.00211},
eprint = {2611.00211},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.00211},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Magnetoelectric Wireless Power Transfer Receivers for Sub-Millimeter Scale Implantable Bioelectronics
AU - Jonathan Tan
AU - Serene Feng
AU - Thomas Mion
AU - Sydney Acosta
AU - Konrad Bussmann
AU - Peter Finkel
AU - Roy Olsson
PY - 2026
DA - 2026/11/01
PB - arXiv
DO - 10.48550/arxiv.2611.00211
UR - https://arxiv.org/abs/2611.00211
AB - Implanted biomedical devices for continuous physiological monitoring require reliable wireless power delivery to anatomically constrained and sensitive sites where batteries are impractical or hazardous. Existing wireless power transfer (WPT) modalities, including inductive coils and ultrasonic transducers suffer from performance degradation as receiver dimensions are miniaturized, limiting their application for space-limited locations such as fingertips, the ocular cavity, and intracranial sites. We present a microelectromechanical systems (MEMS) magnetoelectric WPT receiver integrating piezoelectric aluminum scandium nitride and magnetostrictive iron-cobalt/silver multilayer thin-films, microfabricated within a footprint of 770 x 360 x 2.25 micrometers. The receiver operates at its 100 kHz flexural-mode resonance with a quality factor of 1180 and delivers 1.0 microwatt to a matched 10 kohm load under a standard-compliant 205 micro-Tesla RMS excitation field. This device exhibits a magnetoelectric coefficient of 1274 V cm-1 Oe-1 and a power figure of merit (FOMP) of 4.05 x 10-3 mW cm-3 Oe-2 Hz-1, both the highest reported values of comparable magnetoelectric WPT receivers. The FOM is 20-fold higher than the next best comparable-frequency device. These miniaturized devices establish MEMS magnetoelectric transduction as a scalable platform for battery-free wireless powering of microwatt-class implants in the most anatomically demanding regions of the body.
ER -