Energy-Harvesting Coil for Circularly Polarized Fields in Magnetic Resonance Imaging

The authors introduce a setup for energy harvesting in magnetic resonance imaging (MRI) scanners that efficiently converts circularly polarized radio-frequency electromagnetic fields. Such an approach allows doubling of performance, compared to traditional harvesting coils that convert linearly polarized field components. The setup can be used as a wireless power supply for pieces of additional equipment used within MRI scanners. Importantly, a series of experiments with two commonly used MRI scanners demonstrates that the proposed coil does not degrade the quality of MRI images.