Design of high port isolation access point MIMO system using centrally located hexahedron

A novel dual-band multiple-input multiple-output (MIMO) antenna system with diversity polarisation and high port isolation is proposed. The antenna system consists of six antennas (three antennas operate at 2.44 GHz and the others at 5.25 GHz) mounted on a hexagon ground plane and backed by a centrally located hexahedron. The antennas for different bands are arranged in an alternative fashion along the peripheral of the hexagonal ground. From simulation and experimental results, the proposed MIMO system has been shown to perform superbly at both the 2.44 and 5.25 GHz bands, with significant and consistent improvements in sidelobe levels and envelope correlation coefficients at the lower band due to the presence of the hexahedron.