The invention relates to a unitary magnetic coupler including a first inductor (Lp) consisting of a first winding of phase and having a number N of turns between the two ends of the first winding and, magnetically coupled to the first inductor (Lp), a second inductor (Ls) consisting of a second winding of the same phase and having the same number N of turns between the two ends of the second winding, where the ends of the first and second windings of the unitary magnetic coupler are interconnected using links consisting of capacitors (C1, C2) of equal value.