Beam-switching antenna, comprising: - an input port for connection of an RF link, for routing a RF signal; - a weighting and division block for said signal, connected to the input port, the outputs being assigned a different weighting in order to obtain the desired amplitude value of the signal; - a switching block connected to the outputs of the weighting and division block and having two switching matrices (24a, 24b; 48, 50) with N input terminals, such that N = 2 m; - a distribution block; - a network of antennas containing antenna elements connected to the outputs of the switching block; and - an electronic control block connected to the switching block and to the distribution block; characterised in that each switching matrix (24a, 24b; 48, 50) comprises Log2 stages, each stage having N/2 matrix switches (30a, 30b; 30c, 30d; 56) with two inputs and two outputs, the matrix switches being arranged in a matrix configuration, each matrix switch being identified by a stage X and a row Y, the two outputs of the N/2 matrix switches (30a, 30b; 56), each identified by a stage X and a row Y, being connected directly on the one hand to an input of a matrix switch (30c, 30d; 56) positioned at the following stage X+1 and at row Y and on the other hand to the remaining input of a second matrix switch (30d, 30c; 56) positioned at the following stage X+1 and at line Yx, according to a physical interconnection law of the switches defined according to the following rule: For X=1 Yx = 1 − Y + N 2 For X>1 Yx = 1 − Y + N 2 + ∑ i = 2 X − 1 E 1 + Y × 2 i N + 2 i × N 2 i where E(x) represents the integer-part function, and in that the antenna has a distribution block comprising 2N distribution switches (26; 52) with one input and k outputs, the inputs of which are each connected to an output of the switching matrices (24a, 24b; 48, 50) and the outputs of which are each connected to an antenna element, and in that the antenna elements are arranged about a cylindrical surface according to an increasing numbering, half of the elements being of even order, the other half being of odd order and in which, the distribution switches (26; 52) being numbered in an order increasing in steps of one and the outputs of the switching matrices (24a, 24b; 48, 50) being numbered in an order increasing in steps of two, the first N distribution switches (26; 52) with one input and k outputs of the distribution block are connected on the one hand to the first switching matrix (24a; 50) at the input and on the other hand to the antenna elements of odd order at the output, the other N distribution switches (26; 52) being connected on the one hand to the other switching matrix (24b; 48) at the input and on the other hand to the antenna elements of even order at the output, the k antenna elements whose numbering has the remainder r in its Euclidean division by 2N being connected to the distribution switches (26; 52) numbered r, each distribution switch (26; 52) being connected to an output of the switching matrices (24a, 24b; 48, 50) of the same numbering. - an input port for connection of an RF link, for routing a RF signal; - a weighting and division block for said signal, connected to the input port, the outputs being assigned a different weighting in order to obtain the desired amplitude value of the signal; - a switching block connected to the outputs of the weighting and division block and having two switching matrices (24a, 24b; 48, 50) with N input terminals, such that N = 2 m; - a distribution block; - a network of antennas containing antenna elements connected to the outputs of the switching block; and - an electronic control block connected to the switching block and to the distribution block;