An autonomous electronics system for ultrasound energy transfer and passive communication

Ultrasound is a promising method for powering of implants. It allows to transfer energy in a focused way, which leads to high efficiency and allows reaching implants deeply embedded in tissue. In addition, ultrasound can be used for communication with implants. In the present work, we developed a sy...

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Bibliographic Details
Published in2022 IEEE International Ultrasonics Symposium (IUS) pp. 1 - 4
Main Authors Fournelle, Marc, Fadel, Amen, Becker, Franz-Josef, Moses, Manfred, Schmieger, Marc, Tretbar, Steffen
Format Conference Proceeding
LanguageEnglish
Published IEEE 10.10.2022
Subjects
backscatter modulation
Encoding
Energy exchange
energy transfer
implant
Implants
Light emitting diodes
load modulation
Modulation
passive communication
Transducers
Ultrasonic imaging
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Summary:Ultrasound is a promising method for powering of implants. It allows to transfer energy in a focused way, which leads to high efficiency and allows reaching implants deeply embedded in tissue. In addition, ultrasound can be used for communication with implants. In the present work, we developed a system combining energy transfer with a passive communication scheme based on modulating the backscattered signal amplitude. Using a receive transducer of 5 mm in radius and a 2-element 16 mm transmit aperture, up to 7 mW could be transferred, which was enough to power an LED and a circuit allowing encoding the optical sensor readout (photocurrent) into the backscatter information. By means of load modulation, amplitude variations of the backscattered signal until 35% were possible.
ISSN:1948-5727
DOI:10.1109/IUS54386.2022.9958097