A device for the radio stimulation of an antenna includes at least one transmission sub-assembly formed by an array of radiating elements and an array of photoelectric receivers; as well as a generator that synthesizes a set of electrical signals that are intended to excite each radiating element. The electrical signals are transmitted to the transmission sub-assembly in the form of modulated light waves that are multiplexed to form a composite laser beam that illuminates the array of photoelectric receivers. Each of the photoelectric receivers receives a light wave. The array of photoelectric sensors and the array of radiating elements have substantially identical arrangements. Each photoelectric receiver is connected to a radiating element in its array at a position identical to the one that said receiver occupies within its own or a position symmetrical thereto.