Multi-band antenna, associable with at least one electronic device, said antenna comprising: • a single power supply point; • at least one first resonant circuit for resonating at a first frequency; • at least one second resonant circuit for resonating at a second frequency; said resonant circuits (5, 7) are electrically connected to each other and the connection point between the resonant circuits (5, 7) corresponds to the power supply point; said resonant circuits (5, 7) are arranged in the same reference plane defined by a first axis and by a second axis orthogonal thereto; each resonant circuit (5, 7) is a dipole comprising two arms, respectively a first arm (51, 71) and a second arm (53, 73), and each one of said arms (51, 53, 71, 73) is electrically connected, at one end, to the single power supply point; the whole antenna has a structure with central symmetry, developed with respect to a point having null potential or virtual mass and the two arms (51-53, 71-73) of each resonant circuit (5, 7) have a central symmetry configuration; - each arm (51, 53, 71, 73) of each resonant circuit comprises at least one curvilinear portion (54, 74); - wherein each curvilinear portion (54, 74) is a semicircle, with a curvature of 160° to 200° - the curvilinear portions (54, 74) of the first arms (51, 71) of the respective resonant circuits (5, 7) are arranged symmetrically with respect to the first axis, in such a way that they are faced and their concavities are different to each other with respect to the first axis such that the coupling between the resonant circuits (5, 7) is minimized and to render the currents orthogonal to each other in order to reduce coupling and to reduce energizing the modes of the neighbouring circuit; - the curvilinear portions (54, 74), of the second arms (53, 73) of the respective resonant circuits (5, 7), are arranged symmetrically with respect to the first axis, in such a way that they are faced and their concavities are different to each other with respect to the first axis such that the coupling between the resonant circuits (5, 7) is minimized and to render the currents orthogonal to each other in order to reduce coupling and to reduce energizing the modes of the neighbouring circuit; the antenna's radiation diagram at the operating frequencies (f1, f2) is a function of the radius of curvature of the curvilinear portions (54, 74) of the respective resonant circuits (5, 7); the antenna is adapted to be used simultaneously over multiple bands. • a single power supply point; • at least one first resonant circuit for resonating at a first frequency; • at least one second resonant circuit for resonating at a second frequency; - each arm (51, 53, 71, 73) of each resonant circuit comprises at least one curvilinear portion (54, 74); - wherein each curvilinear portion (54, 74) is a semicircle, with a curvature of 160° to 200° - the curvilinear portions (54, 74) of the first arms (51, 71) of the respective resonant circuits (5, 7) are arranged symmetrically with respect to the first axis, in such a way that they are faced and their concavities are different to each other with respect to the first axis such that the coupling between the resonant circuits (5, 7) is minimized and to render the currents orthogonal to each other in order to reduce coupling and to reduce energizing the modes of the neighbouring circuit; - the curvilinear portions (54, 74), of the second arms (53, 73) of the respective resonant circuits (5, 7), are arranged symmetrically with respect to the first axis, in such a way that they are faced and their concavities are different to each other with respect to the first axis such that the coupling between the resonant circuits (5, 7) is minimized and to render the currents orthogonal to each other in order to reduce coupling and to reduce energizing the modes of the neighbouring circuit; the antenna's radiation diagram at the operating frequencies (f1, f2) is a function of the radius of curvature of the curvilinear portions (54, 74) of the respective resonant circuits (5, 7); the antenna is adapted to be used simultaneously over multiple bands.