Accurate Angle-of-Arrival Sensing for Receiving and Scattering Array Antennas

Incorporating sensing capabilities into reconfigurable intelligent surfaces coupled with signal rerouting functionalities provides a promising route to integrating sensing and communication functionalities. In this paper, we propose and numerically demonstrate the feasibility of accurate angle-of-arrival detection in reconfigurable reflectarrays. A theoretical model has been formulated to articulate the sensing ability, drawing upon principles rooted in the receiving antenna theory.