A method for allocating antenna elements of an antenna array, which antenna array provides radio coverage for User Equipments, UEs, (121,122, 123), operating in a wireless communications network, and which antenna array supports multiple Radio Access Technologies, RATs, comprising at least a first RAT and a second RAT, the method comprising: obtaining any one or more out of: a first radio coverage requirement of the first RAT and a first data traffic load of first UEs using the first RAT, obtaining any one or more out of: a second radio coverage requirement of the second RAT and a second data traffic load of the second UEs using the second RAT, allocating the antenna elements of the antenna array between at least the first RAT and the second RAT, by assigning for the first RAT a number of first sections of antenna elements, and assigning for the second RAT a number of second sections of antenna elements, wherein the assigning is performed by interleaving the one or more first section/s of antenna elements assigned for the first RAT with the second sections of antenna elements assigned for the second RAT, and wherein first sizes of the assigned first sections and second sizes of the assigned second sections are based on the obtained any one out of first radio coverage requirement and the first data traffic load, and the obtained any one out of second radio coverage requirement and the second data traffic load, and adjusting the allocated antenna elements of the antenna array between any of: the first RAT and the second RAT, in regard to the interleaving and the sizes of the respective assigned sections, based on obtained any one out of radio coverage measurement data of the corresponding RAT and a data traffic load measurement data of UEs (121, 122) using the corresponding RAT, wherein the adjusting is performed dynamically. obtaining any one or more out of: a first radio coverage requirement of the first RAT and a first data traffic load of first UEs using the first RAT, obtaining any one or more out of: a second radio coverage requirement of the second RAT and a second data traffic load of the second UEs using the second RAT, allocating the antenna elements of the antenna array between at least the first RAT and the second RAT, by assigning for the first RAT a number of first sections of antenna elements, and assigning for the second RAT a number of second sections of antenna elements, wherein the assigning is performed by interleaving the one or more first section/s of antenna elements assigned for the first RAT with the second sections of antenna elements assigned for the second RAT, and wherein first sizes of the assigned first sections and second sizes of the assigned second sections are based on the obtained any one out of first radio coverage requirement and the first data traffic load, and the obtained any one out of second radio coverage requirement and the second data traffic load, and adjusting the allocated antenna elements of the antenna array between any of: the first RAT and the second RAT, in regard to the interleaving and the sizes of the respective assigned sections, based on obtained any one out of radio coverage measurement data of the corresponding RAT and a data traffic load measurement data of UEs (121, 122) using the corresponding RAT, wherein the adjusting is performed dynamically.