A dual-polarised aperture-coupled microstrip antenna with a wide bandwidth, a high isolation, low cross-polarisation levels and low backward radiation levels is presented. The square patch is find at two corners via H-shaped apertures. The measured return loss exhibits a bandwidth of over 24.4% and the isolation is better than 30dB over the bandwidth. The cross-polarisation levels and the front-to-back ratio are better than -23 and 22 dB. respectively.