high similarity with respect to the radiation patterns is provided an antenna includes a patch four symmetrically arranged feed structures two feed ports and a feed network radiation pattern similarity is obtained by the pair wise symmetrical orthogonal layout of the feed structures good isolation between feed ports is achieved through a feed network divided into two network parts where each network part is designed so that each coupling between a network part and a feed structure belonging to the other polarization is cancelled by a mirrored coupling with the other feed structure belonging to the polarization in addition a network part is laid out so that its corresponding feed structures are fed with supporting signals of equal magnitude application_number US 69694400 A description fig1 shows an example of a prior art dual polarised microstrip antenna wo 98 49741 an antenna element 10 comprises a patch 11 and two orthogonal slots 12 a 12 b as feed structures two ports 13 a 13 b u2014 one for each polarisation u2014 are the sources for the feed network 14 port 13 a is connected to network part 14 a that bifurcates into branches 14 a 1 and 14 a 2 each of these branches 14 a 1 14 a 2 cross.