Ricerc@Sapienza

Dielectric characterization of biological tissues has become a fundamental aspect of the design of medical treatments based on electromagnetic energy delivery and their pre-treatment planning. Among several measuring techniques proposed in the literature, broadband and minimally-invasive open-ended probe measurements are best-suited for biological tissues. However, several challenges related to measurement accuracy arise when dealing with biological tissues in both ex vivo and in vivo scenarios such as very constrained set-ups in terms of limited sample size and probe positioning.

This paper presents numerical scenarios concern-ing penetration in a lossy medium that can be obtained by radiating inhomogeneous electromagnetic waves. Former pa-pers approached this problem, both analytically and numeri-cally finding requirements and limits of the so-called \deep-penetration' condition, which consists of a wave transmitted in a lossy medium having an attenuation vector whose direc-tion forms the angle of ninety degrees with the normal to the separation surface.