Antenna array arrangement (1000; 1500; 1700) comprising: a plurality of radio modules , each radio module comprising an antenna array (1011-1018;1511-1518;1711-1718) and a radio frequency integrated chip, each antenna array (1011-1018; 1511-1518; 1711-1718) comprising a plurality of antenna elements assembled in two or more rows on each antenna array (1011-1018; 1511-1518;1711-1718), wherein adjacent antenna elements of each antenna array (1011-1018; 1511-1518;1711-1718) are equally spaced apart; wherein at least two of the plurality of radio modules are staggered along at least one of a horizontal dimension or a vertical dimension, wherein the antenna elements of the at least two staggered radio modules of the plurality of radio modules form rows along the horizontal dimension and columns along the vertical dimension; wherein the projection of the antenna array arrangement (1000;1500;1700) onto the horizontal dimension or the vertical dimension comprises a first end portion, a second end portion and a middle portion and wherein a number of antenna elements projected onto each element of the middle portion is larger than a number of antenna elements projected onto each element of the first end portion and the second end portion; wherein the numbers of projected antenna elements of the antenna array arrangement (1000;1500;1700) onto the horizontal dimension or the vertical dimension are symmetric and centered around the middle portion; and wherein adjacent elements of a projection of the plurality of antenna elements of the at least two different radio modules of the plurality of radio modules onto the horizontal dimension or the vertical dimension have a distance in the order of or less than about half of a wavelength of a transmit signal from the antenna array arrangement (1000;1500;1700); wherein a gap between adjacent antenna elements of two different adjacent radio modules is larger than said distance. a plurality of radio modules , each radio module comprising an antenna array (1011-1018;1511-1518;1711-1718) and a radio frequency integrated chip, each antenna array (1011-1018; 1511-1518; 1711-1718) comprising a plurality of antenna elements assembled in two or more rows on each antenna array (1011-1018; 1511-1518;1711-1718), wherein adjacent antenna elements of each antenna array (1011-1018; 1511-1518;1711-1718) are equally spaced apart; wherein at least two of the plurality of radio modules are staggered along at least one of a horizontal dimension or a vertical dimension, wherein the antenna elements of the at least two staggered radio modules of the plurality of radio modules form rows along the horizontal dimension and columns along the vertical dimension; wherein the projection of the antenna array arrangement (1000;1500;1700) onto the horizontal dimension or the vertical dimension comprises a first end portion, a second end portion and a middle portion and wherein a number of antenna elements projected onto each element of the middle portion is larger than a number of antenna elements projected onto each element of the first end portion and the second end portion; wherein the numbers of projected antenna elements of the antenna array arrangement (1000;1500;1700) onto the horizontal dimension or the vertical dimension are symmetric and centered around the middle portion; and wherein adjacent elements of a projection of the plurality of antenna elements of the at least two different radio modules of the plurality of radio modules onto the horizontal dimension or the vertical dimension have a distance in the order of or less than about half of a wavelength of a transmit signal from the antenna array arrangement (1000;1500;1700); wherein a gap between adjacent antenna elements of two different adjacent radio modules is larger than said distance. <EOS>