A dual-polar antenna for a base station of mobile radio systems with adjustable azimuth beamwidth comprising: - at least a set of radiating elements comprising: ∘ an inner group of radiating elements having at least two input ports (110, 111), and ∘ two outer groups of radiating elements (101, 102), - the inner group of radiating elements is comprised of radiating elements capable of radiating and/or receiving two nominally orthogonally polarized signals, - the outer groups of radiating elements (101, 102) are comprised of radiating elements capable of radiating and/or receiving signals with a single polarization, - wherein the dual-polar antenna comprises a single power division network feeding the inner and outer (101, 102) groups of radiating elements, said single power division network comprising two inputs (240, 241), one for each of the input polarized signals, two outputs (211, 212) connected to the two input ports (110, 111) of the inner group of radiating elements respectively, two outputs (221, 222), each connected to one of the outer groups of radiating elements (101, 102). characterised in that: - the power division network is a coupling network which comprises: - two transmission lines (231, 232), each of the transmission lines being connected between one of the input ports (110, 111) of the inner group of radiating elements and one of the input ports (240, 241) of the coupling network, respectively, - a coupling line having a portion inductively coupled to a portion (231a, 232a) of each of the transmission lines (231, 232) of the coupling network, said coupling line comprising on one side, a first unconnected end and on the other side, a second end connected to two output lines (112, 113) thereby forming a Tee-junction, each output line (112, 113) being connected to one of the outer groups of radiating elements (101, 102), respectively, and a single variable phase shifter within the coupling line and connected to an input end of the inductively coupled portion of the coupling line and the Tee junction. - at least a set of radiating elements comprising: ∘ an inner group of radiating elements having at least two input ports (110, 111), and ∘ two outer groups of radiating elements (101, 102), ∘ an inner group of radiating elements having at least two input ports (110, 111), and ∘ two outer groups of radiating elements (101, 102), - the inner group of radiating elements is comprised of radiating elements capable of radiating and/or receiving two nominally orthogonally polarized signals, - the outer groups of radiating elements (101, 102) are comprised of radiating elements capable of radiating and/or receiving signals with a single polarization, - wherein the dual-polar antenna comprises a single power division network feeding the inner and outer (101, 102) groups of radiating elements, said single power division network comprising two inputs (240, 241), one for each of the input polarized signals, two outputs (211, 212) connected to the two input ports (110, 111) of the inner group of radiating elements respectively, two outputs (221, 222), each connected to one of the outer groups of radiating elements (101, 102). - the power division network is a coupling network which comprises: - two transmission lines (231, 232), each of the transmission lines being connected between one of the input ports (110, 111) of the inner group of radiating elements and one of the input ports (240, 241) of the coupling network, respectively, - a coupling line having a portion inductively coupled to a portion (231a, 232a) of each of the transmission lines (231, 232) of the coupling network, said coupling line comprising on one side, a first unconnected end and on the other side, a second end connected to two output lines (112, 113) thereby forming a Tee-junction, each output line (112, 113) being connected to one of the outer groups of radiating elements (101, 102), respectively, and a single variable phase shifter within the coupling line and connected to an input end of the inductively coupled portion of the coupling line and the Tee junction.