The invention relates to a radio communication antenna (20) including a reflector (22) arranged at a first opening of a cylindrical lateral screen (27), and a radome (28) formed by flexible material covering a second opening of the lateral screen (27) so as to have a protective surface (29) opposite to the reflector (22). According to the invention, the antenna is characterised in that the protective surface (29) is curved by the mechanical action of deforming elements (21h) of the antenna (20) contacted with the protective surface (29).