Simulations of Angular Super-Resolution with the Active Surface of the Sardinia Radio Telescope

We are currently carrying out a project devoted to the implementation of super-resolution (SR) on single-dish radio telescopes, which should result in an angular resolution better than the classical diffraction limit. A feasible method to achieve this goal consists of using variable transmittance pupils. The simplest transmittance pupils are binary phase shift masks, also known as Toraldo Pupils, consisting of finite-width concentric coronae which modify the phase of the incident wavefront. In previous works we have suggested that the active primary surface of a telescope could be used to simulate a Toraldo Pupil placed at the entrance pupil. In this paper we present new electromagnetic simulations whose goal is to assess the feasibility of this method using the shaped active surface of the 64-m Sardinia Radio Telescope.