Design of Multiple Input and Multiple Output Antenna for Wi-Max and WLAN Application

In this design, four port MIMO antenna of annular slot is proposed to get better gain and diversity performance of the frequency range from 2 to 6 GHZ for Wi-Max (3.5 GHZ) and WLAN (5 GHZ) application. To get the pattern diversity, the four micro strip feed lines are used and it is isolated by four shorts to maintain isolation. The Micro strip patch antenna are used because of the advantages like low structure in profile, cost of the fabrication is low and support both the circular and the linear polarizations. The antenna performance are analysed by the simulation results which produces the gain, directivity, return loss and radiated power. The antenna proposed used in WLAN and Wi-Max application. The antenna dimensions are thickness 0.8 mm, length 30 mm, width 38 mm. The Flame Retardant (FR4) substrate is used which has the relative permittivity value 4.3. The antenna design proposed is simulated using the Advanced Design System (ADS) software and output is tested using the network analyzer.