A power system for controlling the variable electrical tilt in the vertical plane of radiating elements (15A-15D; 35A-35D; 46A-46H; 56A-56H; 76A-76H) in an a network of array antennas, comprising a Butler matrix (10; 30; 40; 50; 70) and at least one module (14A-14D; 34A; 34C; 34D; 45A; 45C; 45D; 55A, 55C, 55D; 75A, 75C, 75D) comprising delay lines (19; 61), the Butler matrix (10; 30; 40; 50; 70) comprising N inputs (11A-11D; 31A-31D; 41A-41D; 51A-51D; 71A-71D) and N outputs (13A-13D; 33A-33D; 44A-44D; 54A-54D; 74A-74D) and hybrid couplers (12A-12D; 32A-32D; 42A-42F; 52A-52F; 72A-72F), each input (11A-11D; 31A-31D; 41A-41D; 51A-51D; 71A-71D) being able to receive a single-band or multiband radio frequency signal belonging to any frequency band F1-Fn and each output (13A-13D; 33A-33D; 44A-44D; 54A-54D; 74A-74D) being able to transmit a signal to at least one radiating element (15A-15D; 35A-35D; 46A-46H; 56A-56H; 76A-76H) enabling an independent electrical tilt for each frequency band F1-Fn, to at least one of the outputs (13A-13D; 33A, 33C, 33D; 44A, 44C, 44D; 54A, 54C, 54D; 74A, 74C, 74D) of the Butler matrix (10; 30; 40; 50; 70) is connected a module (14A-14D; 34A; 34C; 34D; 45A; 45C; 45D; 55A, 55C, 55D; 75A, 75C, 75D) which connects that at least one output (13A-13D; 33A, 33C, 33D; 44A, 44C, 44D; 54A, 54C, 54D; 74A, 74C, 74D) to the respective radiating element (15A-15D; 35A, 35C, 35D; 46A, 46B, 46E-46H; 56A, 56B, 56E-56H; 76A, 76B, 76E-76H), the module (14A-14D; 34A; 34C; 34D; 45A; 45C; 45D; 55A, 55C, 55D; 75A, 75C, 75D) comprising - a first stage of diplexers (17; 60) being able to receive the signal from said output (13A-13D; 33A, 33C, 33D; 44A, 44C, 44D; 54A, 54C, 54D; 74A, 74C, 74D) and to separate the signal based on said frequency bands F1-Fn, - a second stage of fixed delay lines (19; 61) being able to apply a given electrical delay to the signals provided by the first stage in each frequency band F1-Fn, - a third stage of variable phase shifters (21; 62) being able to introduce a phase shift adjusted to the signals provided by the second stage into each frequency band F1-Fn, and - a fourth stage of diplexers (23; 63) being able to gather the signals provided by the third stage belonging to the different frequency bands F1-Fn to transmit them to at least one radiating element (15A-15D; 35A, 35C, 35D; 46A, 46B, 46E-46H; 56A, 56B, 56E-56H; 76A, 76B, 76E-76H), - a first stage of diplexers (17; 60) being able to receive the signal from said output (13A-13D; 33A, 33C, 33D; 44A, 44C, 44D; 54A, 54C, 54D; 74A, 74C, 74D) and to separate the signal based on said frequency bands F1-Fn, - a second stage of fixed delay lines (19; 61) being able to apply a given electrical delay to the signals provided by the first stage in each frequency band F1-Fn, - a third stage of variable phase shifters (21; 62) being able to introduce a phase shift adjusted to the signals provided by the second stage into each frequency band F1-Fn, and - a fourth stage of diplexers (23; 63) being able to gather the signals provided by the third stage belonging to the different frequency bands F1-Fn to transmit them to at least one radiating element (15A-15D; 35A, 35C, 35D; 46A, 46B, 46E-46H; 56A, 56B, 56E-56H; 76A, 76B, 76E-76H),