Several works in literature and from our research group have shown that periodic structures with space-time varying properties lead to a non-symmetric (non-reciprocal) response. In short, in some frequency intervals (band gaps), these metamaterials allow the propagation of waves only in one direction and block them in the opposite direction.
This thesis aims to design a novel MEMS circular repetition of cells to obtain a circulator, i.e., a three-port device that receives an input from port 1, transmits it to port 2, and finally to port 3, strictly in this order. A conceptual layout, which adapts a linear array we previously studied, is reported in the figure. After a review of the state-of-the-art (electric) circulators, the candidate will design and test the layouts with multi-physics simulations in COMSOL. Depending on the outcome, a prototype could be manufactured in partnership with STMicroelectronics, one of the leading companies in the MEMS industry.
Contacts: Jacopo Marconi, Emanuele Riva