Ultrasound Wireless Power Transfer to Miniaturized Biomedical Implants
Professor Mehdi Kiani
Pennsylvania State University
State College, PA, USA
Ultrasound's conventional use within the medical field primarily revolves around tissue imaging. However, in the last decade or so, ultrasound has found increasingly intriguing applications in the realm of wireless power transfer (WPT) for deeply implanted miniature medical devices. In comparison to alternative WPT techniques, ultrasound stands out for its unique ability to provide high-power density to these tiny implants deeply embedded within the body. This remarkable capability is owing to ultrasound's small wavelength at low frequencies, reduced tissue energy loss, capacity for precise focusing, and adherence to high safety standards. Ultrasonic WPT has been successfully demonstrated in various applications, including neural recording and stimulation. In this tutorial, I will delve into the fundamentals, recent advancements, existing challenges, and diverse applications of ultrasound-based WPT for millimeter-scale implants.
Mehdi Kiani received his Ph.D. degree in Electrical and Computer Engineering from the Georgia Institute of Technology in 2014. He joined the faculty of the School of Electrical Engineering and Computer Science at the Pennsylvania State University in August 2014 where he is currently an Associate Professor. His research interests are in the multidisciplinary areas of analog and power-management integrated circuits, ultrasound-based medical systems, wireless implantable medical devices, and neural interfaces. He was a recipient of the 2020 NSF CAREER Award. He is currently an Associate Editor of the IEEE Transactions on Biomedical Circuits and Systems and IEEE Transactions on Biomedical Engineering. He serves as the technical program committee member of the IEEE International Solid-State Circuits Conference in the IMMD subcommittee.