Research On Antenna Mutual Coupling Reduction Technology For MIMO Networks

With the continuous development of the globalized economy,the pace of development of the communications industry is getting faster and faster.In the future,communication transmission will develop toward miniaturization and high efficiency.In the communication field,MIMO technology plays a core role.High quality of life makes people have higher and higher requirements for communication equipment miniaturization.How to reduce the mutual coupling between the antenna elements in a certain space is a great problem and challenge.Firstly,the background significance and research status of the subject research are described.Aiming at how to reduce the coupling between antennas in a limited space,two different approaches are proposed.Aiming at the special properties of the metamaterial structure,a new type of metamaterial with a meshed isolation ring structure are proposed,and this structure was loaded between two dipole MIMO antennas to enhance the isolation between the antennas.The working frequency of the antenna is set to 2.45 GHz.Simulations is performed on a rectangular split resonant ring,a double-layer S-shaped split ring,and a new mesh isolation ring loaded on a dipole antenna.Simulation results show that the isolation of the dipole antenna loaded with the new mesh isolation ring at the same frequency is 19.37 d B higher than that of the dipole antenna loaded with the rectangular open resonant ring.The isolation of the dipole antenna loaded with the new mesh isolation ring is 4.92 d B higher than that of the dipole antenna loaded with the double-layer S-shaped split ring.Through design and simulation,it is verified that the dipole antenna loaded with a new mesh isolation ring can achieve the purpose of better antenna isolation.Compared with the need to add various decoupling structures,ultrawideband can achieve the purpose of improving isolation only by rationally positioning the positions between the antennas.Aiming at the simple and easy operation of this method,the designed ultra-wideband MIMO antenna can isolate up to 18 d B in the effective frequency range.Figure 47;Table 3;Reference 50...