Jens Hfflin1, Elmar Fischer2, Jrgen Hennig2, Jan G. Korvink, 13
1Lab of Simulation - Department of Microsystems Engineering, University of Freiburg - IMTEK, Freiburg, Germany; 2Department of Radiology, University Medical Center Freiburg, Freiburg, Germany; 3Freiburg Institute for Advanced Studies - FRIAS, University of Freiburg, Freiburg, Germany
We present a first prototype of an energy harvesting coil made from insulated copper wire wound on a PMMA holder, designed to fit inside the RF transmission coil of a Bruker AVANCE III MRI spectrometer. The harvesting coil scavenges power from gradient switches and RF pulses and converts these AC signals into a DC voltage suitable for driving a receiving coils preamplifier. To limit power consumption, we used a monolithic IC preamplifier manufactured at the Fraunhofer IAF III-V foundry. We were able to show that the preamplifier could be driven solely by our harvester with no external power supply necessary.