Multiband antenna comprising a reflector and at least one radiating element mounted on the reflector, including a first pair of dipoles with cross polarization, which are arranged orthogonally to one another and each comprise two conductive arms, and at least one second pair of dipoles, which are arranged orthogonally to one another and each comprise two conductive arms, the first pair of dipoles and the second pair of dipoles being electrically isolated from one another, wherein - the dipoles of the first pair, corresponding to a low-frequency band, are borne by a leg, the two arms of each dipole of the first pair of dipoles are collinear and the four conductive arms of the first pair of dipoles are arranged in a first plane, - the dipoles of the second pair, corresponding to a higher-frequency band, are borne by a leg, the two arms of each dipole of the second pair of dipoles are collinear and the four conductive arms of the second pair of dipoles are arranged in a second plane, and - the second plane is parallel to the first plane and is placed on the opposite side of the first plane to the reflector, which serves as a ground plane for the first pair of dipoles, - the metal surface area of the conductive arms of the first pair of dipoles in the first plane is larger than the metal surface area of the conductive arms of the second pair of dipoles in the second plane so as to serve as a reflector for the second pair of dipoles; characterized in that the dipoles of the first pair are crossed dipoles that include arms consisting of strands separated by a distance of less than or equal to λ HF /10, where λ HF is the wavelength of the RF signal of said higher-frequency band, and the dipoles of the second pair are chosen from among crossed dipoles, butterfly dipoles each formed of two conductive arms folded axially in a V shape, and printed dipoles. - the dipoles of the first pair, corresponding to a low-frequency band, are borne by a leg, the two arms of each dipole of the first pair of dipoles are collinear and the four conductive arms of the first pair of dipoles are arranged in a first plane, - the dipoles of the second pair, corresponding to a higher-frequency band, are borne by a leg, the two arms of each dipole of the second pair of dipoles are collinear and the four conductive arms of the second pair of dipoles are arranged in a second plane, and - the second plane is parallel to the first plane and is placed on the opposite side of the first plane to the reflector, which serves as a ground plane for the first pair of dipoles, - the metal surface area of the conductive arms of the first pair of dipoles in the first plane is larger than the metal surface area of the conductive arms of the second pair of dipoles in the second plane so as to serve as a reflector for the second pair of dipoles; characterized in that the dipoles of the first pair are crossed dipoles that include arms consisting of strands separated by a distance of less than or equal to λ HF /10, where λ HF is the wavelength of the RF signal of said higher-frequency band, and the dipoles of the second pair are chosen from among crossed dipoles, butterfly dipoles each formed of two conductive arms folded axially in a V shape, and printed dipoles.