The present invention relates to an antenna arrangement (100) comprising an antenna part comprising at least two antenna means, each with a number of first antenna elements having a first polarization and a number of second antenna elements having a second polarization different from said first polarization, said antenna part further comprising antenna part ports. There are two antenna part ports for each antenna means, one antenna part port for each polarization, and the antenna arrangement (100) further comprises polarization controlling means (30), comprising a distribution network, to which the antenna part ports are connected, and which includes at least a main forming network with external interface antenna ports (301,302,303,304). The polarization controlling means (30) is configured to connect antenna part ports and external interface antenna ports (301, 302, 303, 304).