Preliminary Study of Optimized Metasurface Matching Layer in Near Field

Electromagnetic devices often require the maximization of the transmitted field, especially for biomedical applications. The employment of a matching layer can reduce the reflections at the air/skin interface, but it is often realized without design guidelines and it may result bulky. On the other hand, introducing a metasurface can improve user's comfort. A rigorous procedure to find the parameters of the matching layer, also comprising the metasurface, can help in its design. Here, we extend the analytical optimization procedure of our previous works by considering a real patch antenna instead of a short dipole. An experimental setup for retrieving the electric field inside a tissue-mimicking phantom is also presented. Three cases are considered: no matching layer, dielectric-only matching layer and metasurface matching layer. The preliminary results show a good agreements with the theoretical ones.