An antenna array having multiple antennas each serving a respective sector, each antenna being for transmitting and receiving electromagnetic waves with +45° and -45° linear polarizations and comprising: a plurality of element trays each having disposed thereon a dipole pair of slant 45 cross dipole radiating elements; the slant 45 cross dipole radiating elements each being adapted to generate a beam having a 3db beamwidth and a Sector Power Ratio, SPR, defined as: ∑ P undesired ∑ P desired × 100, where P undesired represents undesired power delivered outside of the sector served by the antenna and P desired represents desired power delivered within the sector served by the antenna; characterised by: the slant 45 cross dipole radiating elements each having directors (40; 82; 92) including, relative to the element tray on which the slant 45 cross dipole radiating element is disposed, a bottommost director (40; 82; 92) spaced less than 0.15 lambda from the top of the slant 45 cross dipole radiating element so as to reduce the SPR of the beam while maintaining the 3dB beamwidth, wherein lambda is the wavelength of the centre frequency of the slant 45 cross dipole radiating element and wherein the element trays are tilted in a fallen-domino arrangement so as to orient the dipole pairs of slant 45 cross dipole radiating elements such that they have a boresight at a predetermined downtilt. a plurality of element trays each having disposed thereon a dipole pair of slant 45 cross dipole radiating elements; the slant 45 cross dipole radiating elements each being adapted to generate a beam having a 3db beamwidth and a Sector Power Ratio, SPR, defined as: ∑ P undesired ∑ P desired × 100, where P undesired represents undesired power delivered outside of the sector served by the antenna and P desired represents desired power delivered within the sector served by the antenna; characterised by: the slant 45 cross dipole radiating elements each having directors (40; 82; 92) including, relative to the element tray on which the slant 45 cross dipole radiating element is disposed, a bottommost director (40; 82; 92) spaced less than 0.15 lambda from the top of the slant 45 cross dipole radiating element so as to reduce the SPR of the beam while maintaining the 3dB beamwidth, wherein lambda is the wavelength of the centre frequency of the slant 45 cross dipole radiating element and wherein the element trays are tilted in a fallen-domino arrangement so as to orient the dipole pairs of slant 45 cross dipole radiating elements such that they have a boresight at a predetermined downtilt. the slant 45 cross dipole radiating elements each having directors (40; 82; 92) including, relative to the element tray on which the slant 45 cross dipole radiating element is disposed, a bottommost director (40; 82; 92) spaced less than 0.15 lambda from the top of the slant 45 cross dipole radiating element so as to reduce the SPR of the beam while maintaining the 3dB beamwidth, wherein lambda is the wavelength of the centre frequency of the slant 45 cross dipole radiating element and wherein the element trays are tilted in a fallen-domino arrangement so as to orient the dipole pairs of slant 45 cross dipole radiating elements such that they have a boresight at a predetermined downtilt.