Design of biomedical array applicators: An innovative constrained synthesis strategy to focusing vector fields

Spatially focusing a wave field into a target point is an open topic of remarkable interest for the scientific community both from the theoretical and applicative point of view. Designing applicator able to focus a field into a target point is required in many biomedical applications such as hyperthermia, imaging, activation of chemical or biological processes or remotely heat-controlled drugs release. In those cases, the main objective of suitable synthesis procedures is designing a source (typically the excitations of an antenna array) able to induce a selective power deposition in a target point while keeping its value below prescribed levels elsewhere in order to avoid unwanted side power peaks.