Passive wireless sensors are crucial in modern medical and industrial settings, where they are used to monitor procedures and conditions. In this work, the authors present two circuit concepts for the inductive excitation and the signal reception of magneto-mechanical resonators, which are integrated into a transmit-receive signal chain.
The focus of the work is on comparing the two concepts with respect to their ability to deliver power at different frequencies and to receive signals. The additional components that are necessary for the signal chain are illustrated to give the full system context, but they are not analysed in detail. The instrumentation and the design aim to be scalable for multi-channel arrays, using either off-the-shelf class-D audio amplifiers or a custom H-bridge.
The study was carried out at the Institute for Biomedical Imaging at Hamburg University of Technology together with the Section for Biomedical Imaging at the University Medical Center Hamburg-Eppendorf, and was presented at the IEEE SENSORS 2025 conference in Vancouver, Canada.
Fabian Mohn, Florian Thieben, Jonas Faltinath, Tobias Knopp (2025). Transmit - Receive Circuit Concepts for Magneto-Mechanical Resonators. 2025 IEEE SENSORS, 1-4.
