Approche électromagnétique radiofréquence inductive pour la caractérisation diélectrique sans contact des tissus biologiques : vers le développement d'un dispositif intégré pour le suivi en continu de grandeurs physiologiques

This thesis presents an innovative technique for non-contact radiofrequency (RF) electromagnetic characterization of biological tissues based on multi-frequency inductive sensors. It relies on the use of passive, planar, flexible multi-resonators that interact with the medium under investigation through inductive coupling to monitor its complex dielectric properties, which are representative of its physiological state. A performance study identified its areas of validity and assessed its sensitivity to spatial and temporal variations in the environments under investigation. Work on real environments has highlighted the strong application potential of this approach for non-invasive physiological characterization in healthcare. Finally, the integration of the sensor into a microfluidic environment has been explored with a view to applications on living or cultured tissue, and multimodal monitoring combining RF measurements and complementary analyses.