Closed-loop ultrasonic power and communication with multiple miniaturized active implantable medical devices
- Resource Type
- Conference
- Authors
- Wang, Max L.; Chang, Ting Chia; Teisberg, Thomas; Weber, Marcus J.; Charthad, Jayant; Arbabian, Amin
- Source
- 2017 IEEE International Ultrasonics Symposium (IUS) Ultrasonics Symposium (IUS), 2017 IEEE International. :1-4 Sep, 2017
- Subject
- Bioengineering
Fields, Waves and Electromagnetics
Signal Processing and Analysis
Acoustics
Implants
Arrays
Hardware
Ultrasonic imaging
Ultrasonic variables measurement
Array signal processing
ultrasonic wireless power transfer
implantable medical device
closed-loop
beamforming
linear phased array
- Language
- ISSN
- 1948-5727
An ultrasonic array system is designed for wirelessly powering and communicating with implantable medical devices. A flexible hardware interface is used to drive a 32-element linear phased array with emphasis on programmability and efficiency rather than bandwidth or peak power. Various beam patterns and data modulation schemes are verified at a depth of 6 cm in a tissue phantom with more than sufficient harvested power for typical implant applications. The power transfer efficiency is also characterized versus depth. Finally, a closed-loop test is performed with two mm-sized devices demonstrating both power and data transfer. This system provides a platform for more complex adaptive therapies combining sensing, communication, and stimulation.