A device for the radio stimulation of an antenna having at least one transmission sub-assembly formed by an array of radiating elements, each supplied with a signal from a photoelectric receiver integrated into an array of photoelectric receivers provided with a specific optical filter, which only allows the passage of the wavelength that is dedicated thereto; as well as an electrical signal generator configured to synthesise, for each radiating element, an electrical excitation signal having a set amplitude and phase, as a function of the position of the radiating element in the array, in accordance with a given amplitude-phase law, said electrical signals being transmitted to the transmission sub-assembly in the form of a composite laser beam configured to illuminate the array of photoelectric receivers at a given incidence, said beam being obtained by multiplexing various light waves each modulated by an electrical excitation signal; each of the photoelectric receivers being configured to receive a given light wave, and in that the array of photoelectric sensors and the array of radiating elements have substantially one and the same geometry with one and the same symmetry of distribution of the constituent elements (541, 551) in each array, each photoelectric receiver delivering its electrical signal to a radiating element occupying, within its array, a position identical to the one that said receiver occupies within its own or a position symmetrical thereto, characterised in that the array of photodetectors and the array of radiating elements of the transmission sub-assembly are borne by one and the same panel formed of cells arranged in columns k and rows l, each cell having a photodetector and a radiating element that are substantially collocated and whose active surfaces are oriented in one and the same direction parallel to the axis ( Oy); the signal generator sub-assembly being configured such that the transmitted composite laser beam illuminates the array of photodetectors in a direction defined by two angles α and β in a reference frame (Ox, Oy, Oz), such that the direction in which the radio beam is radiated is determined by two angles α ' and β ' defined, in the reference frame (Ox, Oy, Oz), by the relationships: α ′ ≈ a ⋅ θ + c ⋅ α and β ′ ≈ b ⋅ ψ + d ⋅ β where a, b, c and d have the value -1 or 1; θ and ψ being the angles defining the deflection imposed on the radio beam by the phase law generated by the signal generator sub-assembly. each of the photoelectric receivers being configured to receive a given light wave, and in that the array of photoelectric sensors and the array of radiating elements have substantially one and the same geometry with one and the same symmetry of distribution of the constituent elements (541, 551) in each array, each photoelectric receiver delivering its electrical signal to a radiating element occupying, within its array, a position identical to the one that said receiver occupies within its own or a position symmetrical thereto, characterised in that the array of photodetectors and the array of radiating elements of the transmission sub-assembly are borne by one and the same panel formed of cells arranged in columns k and rows l, each cell having a photodetector and a radiating element that are substantially collocated and whose active surfaces are oriented in one and the same direction parallel to the axis ( Oy); the signal generator sub-assembly being configured such that the transmitted composite laser beam illuminates the array of photodetectors in a direction defined by two angles α and β in a reference frame (Ox, Oy, Oz), such that the direction in which the radio beam is radiated is determined by two angles α ' and β ' defined, in the reference frame (Ox, Oy, Oz), by the relationships: α ′ ≈ a ⋅ θ + c ⋅ α and β ′ ≈ b ⋅ ψ + d ⋅ β where a, b, c and d have the value -1 or 1; θ and ψ being the angles defining the deflection imposed on the radio beam by the phase law generated by the signal generator sub-assembly.