The present invention relates to a communication node (1) comprising at least one antenna arrangement (2) with two horizontal and two vertical array antennas. A first horizontal antenna port (4) and a second vertical antenna port (10) are connected to a first polarization (P1). A first vertical antenna port (8) and a second horizontal antenna port (6) are connected to an orthogonal second polarization (P2). Each port is connected to corresponding antenna elements. Said first horizontal antenna port (4) and said first vertical antenna port (8) are connected in phase. Said second horizontal antenna port (6) and said second vertical antenna port (10) are connected with opposite phases. A plurality of antenna element symmetry pairs (11a, 12a; 11b, 12b; 11c, 12c; 11d, 12d; 13a, 14a; 13b, 14b; 13c, 14c; 13d, 14d) are formed with respect to a common symmetry point (15). Certain weights are applied to the antenna elements of each symmetry pair, where a weight for a certain polarization (P1, P2) in an antenna element in a symmetry pair comprises the complex conjugated weight for an orthogonal polarization (P2, P1) in the other antenna element in the symmetry pair.