In this book a 4 port MIMO antenna rectangular microstrip patch antenna is being proposed & designed using HFSS software. It is being observed that the fabricated antenna is having bandwidth of 210 MHz, the radiation efficiency of antenna is 72.04% and total Gain obtained at this frequency is 21.32 dB. The VSWR of antenna is 1.3. The antenna having impedance of 40.69 , due to this it is easy to connect a 50 transmission line to antenna, without generating impedance mismatch losses. ECC values are well below 0.5 in the desired frequency bands, which ensures good diversity performance. The...