the point of view of the circuit diagram shown in fig7 b this results in putting the impedances z a of the antennas a in series it is therefore possible to multiply the number of antennas connected by a same line l one embodiment of the invention multiplying the number of antennas of the radiating device is shown in fig8 four antennas a 1 a 2 a 3 a 4 are grouped in pairs respectively a 1 a 4 and a 2 a 3 with a common slot respectively fc 1 and fc 2 such a structure presenting a parallel connection has a good bandwidth and therefore enables operation at diverse frequencies a switching device 3 is constituted by a switch for example comprising two diodes as shown in fig5 b and enabling the slots fc 1 and fc 2 to be connected to one or other of the lines l 1 and l 2 the switching device 3 is connected to a connection port that is itself connected to a signal feed and or processing means when the connection switches from line l 1 to line l 2 the signal e 3 present in the antenna a 3 is phase shifted by 180 u00b0 with respect to signal e 2 present in antenna a 2 represented by the change in orientation of the vector e 3 on fig8 when the phase difference introduced is 180 u00b0 the orientation of the signal e 3 in the antenna a 3 then changes as shown in fig8 the behaviour of the electromagnetic signals is similar all things being the same for the antennas a 4 and a 1 however in order to obtain phase changes that enable the genuine observation of radiation pattern diversity a fixed.