Design Of Compact MIMO Antenna With Improved Mutual Decoupling

Applications using wireless communication technology are rapidly emerging,resulting in new antenna models that meet the dynamic needs of these applications.The main requirements of the current wireless communication system are data rate and high bandwidth.In order to meet the needs of advanced systems,a new multi-input and multi-output(MIMO)antenna technology has been established and applied.To design a MIMO antenna with many antenna elements is a challenge for inventors because of their small size and the sharing of the same substrate,which results in high coupling between antenna components.We need to overwhelm these coupling effects and design a more isolated and compact antenna.In this thesis different MIMO antennas have been designed with less mutual coupling.The main works of this paper are as follows:Firstly,two circular resonators are positioned on the top Rogers RO3003 substrate,having a specific length,width,and height.An H-shaped Defective Ground Structure(DGS)slot is inserted in the bottom ground layer to obtain high isolation(mutual coupling reduction).Secondly,make the given MIMO antenna work at 5.3 GHz frequency and verify the feasibility by simulation.The simulated results show that the design is suitable for WiMAX,WiFi,and future 5G communicationsystems.Thirdly,a hybrid isolation technique for MIMO antenna to achieve the performance of multi-band and high isolation is proposed.Specifically,two rectangular patches are placed perpendicular on substrate.S-shaped defective ground structure is also familiarized in the ground for mutual decoupling.The given MIMO antenna system resonates at 5 different frequencies which is suitable for satellites communication,down link,uplink and wireless computer network.