A dual polarised edge coupled patch antenna element comprising: a patch radiator ; a ground plane , the ground plane being disposed in a substantially parallel relationship with the patch radiator ; a first feed track connected to a first edge of the patch radiator to connect first signals to the patch radiator for transmission and/or reception at a first polarisation; and a second feed track connected to a second edge of the patch radiator to connect second signals to the patch radiator for transmission and/or reception at a second polarisation, the second edge being at a right angle to the first edge, wherein: the first feed track is connected to the first edge of the patch radiator at a first feed track connection position which is offset by between 5% and 15% of the length of the first edge from the centre of the first edge to provide improved isolation against transmission and/or reception of the first signals at the second polarisation; and the second feed track is connected to the second edge of the patch radiator at a second feed track connection position which is offset by between 5% and 15% of the length of the second edge from the centre of the second edge to provide improved isolation against transmission and/or reception of the second signals at the first polarisation, the first feed track connection position and the second feed track connection position each being offset in a respective direction away from the corner between the first edge and the second edge. a patch radiator ; a ground plane , the ground plane being disposed in a substantially parallel relationship with the patch radiator ; a first feed track connected to a first edge of the patch radiator to connect first signals to the patch radiator for transmission and/or reception at a first polarisation; and a second feed track connected to a second edge of the patch radiator to connect second signals to the patch radiator for transmission and/or reception at a second polarisation, the second edge being at a right angle to the first edge, wherein: the first feed track is connected to the first edge of the patch radiator at a first feed track connection position which is offset by between 5% and 15% of the length of the first edge from the centre of the first edge to provide improved isolation against transmission and/or reception of the first signals at the second polarisation; and the second feed track is connected to the second edge of the patch radiator at a second feed track connection position which is offset by between 5% and 15% of the length of the second edge from the centre of the second edge to provide improved isolation against transmission and/or reception of the second signals at the first polarisation, the first feed track connection position and the second feed track connection position each being offset in a respective direction away from the corner between the first edge and the second edge. the first feed track is connected to the first edge of the patch radiator at a first feed track connection position which is offset by between 5% and 15% of the length of the first edge from the centre of the first edge to provide improved isolation against transmission and/or reception of the first signals at the second polarisation; and the second feed track is connected to the second edge of the patch radiator at a second feed track connection position which is offset by between 5% and 15% of the length of the second edge from the centre of the second edge to provide improved isolation against transmission and/or reception of the second signals at the first polarisation, the first feed track connection position and the second feed track connection position each being offset in a respective direction away from the corner between the first edge and the second edge. <EOS>