A Conformal and Wearable Metasurface for Non-invasive Skin Inflammation Monitoring

In this paper, we propose the use of a conformal and wearable metasurface for non-invasive monitoring of the inflammation status of wounded skin tissue. We first present the designed RF passive metasurface, composed by a matrix of spiral unit-cells, each resonant at a slightly different frequency. In particular, the response of the metasurface can be read by a non-resonant inductive loop mutually coupled with the unit-cells. After that, we conceived a numerical test-case to verify the proposed approach and we performed accurate full-wave simulations. The obtained results demonstrate the excellent metasurface sensitivity and spatial resolution in evaluating the inflammation state; thus, further analyses are encouraged.