Switching matrix for wide band electric transmission signals

A switching matrix for wide band electric transmission signals, said matrix comprising inlet/outlets, two sets of conductors which lead to the inlet/outlets, one of the sets forming the columns while the other set forming the rows of the matrix, controlled switching points disposed at the intersections of the conductors and constant current sources arranged to control the switching points wherein the switching points are symmetrical structure being constituted by two half switching points and wherein each row and each column of the matrix is provided on a corresponding separate plane support with each row conductor or column conductor being wired together with the half switching points which are connected directly to it, the supports being assembled in two stacks, one constituted by the supports which contain the row conductors, the other constituted by supports which contain the column conductors, the two stacks being disposed perpendicularly to each other and placed with their edge surface against each other, the supports of the two stacks including, at their points of contact connections which provide electrical connections between corresponding pairs of half switching points.