A method for modifying a radiation pattern of an antenna array, said array being composed of radiation elements which are connected to active modules, the shape of the pattern being a function of the amplitudes and phases applied to said active modules, wherein a modification of said pattern being carried out by means of a complex weighting of said amplitudes and phases as a function of a given requirement, a path, along which the complex weighting coefficient of each module is successively determined, is defined among said active modules: - in one step, there is calculated the theoretical complex weighting function which meets said given requirement, which leads to obtaining a set of complex coefficients associated with each active module being obtained; - in another step, the set of said complex coefficients is multiplied by the complex coefficient which is linked to the misalignment of the pattern which it is desirable to apply; following these two steps, a set of theoretical complex coefficients, associated with said active modules, being obtained; - in a following step, the set of complex coefficients to be applied is defined, referred to as corrected complex coefficients, in accordance with the following iterative process: - the corrected complex coefficient (M corrected (1, 1)) of the first module of the path being the coefficient which minimises the deviation from the theoretical complex coefficient (M theoretical (1, 1)) calculated for the first module, the quantification error (Err 11) is calculated as being the difference between the theoretical complex coefficient and the corrected complex coefficient; - the corrected complex coefficient (M corrected (j, k)) of a module of said path is the coefficient which minimises the deviation from a target coefficient which is equal to the theoretical complex coefficient (M theoretical (j, k)), calculated for said module, increased by the quantification error (Err j, k-1) calculated for the module immediately preceding said module; - the quantification error (Err j, k) associated with said module (j, k) is calculated as being the difference between said target coefficient and said corrected complex coefficient (M corrected (j, k)); and in that the step in which the theoretical complex weighting function is calculated precedes the step in which the set of theoretical complex coefficients is multiplied by the complex coefficient linked with the misalignment. - in one step, there is calculated the theoretical complex weighting function which meets said given requirement, which leads to obtaining a set of complex coefficients associated with each active module being obtained; - in another step, the set of said complex coefficients is multiplied by the complex coefficient which is linked to the misalignment of the pattern which it is desirable to apply; following these two steps, a set of theoretical complex coefficients, associated with said active modules, being obtained; - in a following step, the set of complex coefficients to be applied is defined, referred to as corrected complex coefficients, in accordance with the following iterative process: - the corrected complex coefficient (M corrected (1, 1)) of the first module of the path being the coefficient which minimises the deviation from the theoretical complex coefficient (M theoretical (1, 1)) calculated for the first module, the quantification error (Err 11) is calculated as being the difference between the theoretical complex coefficient and the corrected complex coefficient; - the corrected complex coefficient (M corrected (j, k)) of a module of said path is the coefficient which minimises the deviation from a target coefficient which is equal to the theoretical complex coefficient (M theoretical (j, k)), calculated for said module, increased by the quantification error (Err j, k-1) calculated for the module immediately preceding said module; - the quantification error (Err j, k) associated with said module (j, k) is calculated as being the difference between said target coefficient and said corrected complex coefficient (M corrected (j, k)); - the corrected complex coefficient (M corrected (1, 1)) of the first module of the path being the coefficient which minimises the deviation from the theoretical complex coefficient (M theoretical (1, 1)) calculated for the first module, the quantification error (Err 11) is calculated as being the difference between the theoretical complex coefficient and the corrected complex coefficient; - the corrected complex coefficient (M corrected (j, k)) of a module of said path is the coefficient which minimises the deviation from a target coefficient which is equal to the theoretical complex coefficient (M theoretical (j, k)), calculated for said module, increased by the quantification error (Err j, k-1) calculated for the module immediately preceding said module; - the quantification error (Err j, k) associated with said module (j, k) is calculated as being the difference between said target coefficient and said corrected complex coefficient (M corrected (j, k));