Design And Research Of Decoupling In Antenna Array

In recent years,science and technology have developed vigorously.As an integral part of wireless communication technology,antennas should follow the development trend.With the increasing complexity and demands of wireless communication systems,single antenna is difficult to satisfy practical applications,and array antennas have been widely used in various fields.With the rapid development of miniaturization and integration of antenna systems,mutual coupling between array antennas has obstructed its development.The mutual coupling of the antenna array will deteriorate array's radiation performance,so reducing mutual coupling has important research significance for the development of antenna arrays.This paper focuses on the theme of restraining mutual coupling,and studies the decoupling of many types of antenna arrays.The main research contents and completed works are as follows:1.Research on mutual coupling reduction of multi-band antenna array.We established two multi-band miniaturized binary antenna arrays covering 5G frequency bands proposed by the Ministry of Industry and Information Technology,and we designed two different types of decoupling structures to effectively improve the isolation of the antenna arrays;then we analyzed the principle of improving isolation degree of different decoupling structures.These research efforts provide a strong guarantee for reducing the mutual coupling of multi-band miniaturized antennas.2.Research on mutual coupling reduction of ultra-wideband antenna array.We designed two ultra-wideband binary antenna arrays with different operating frequency bands,and we proposed two different forms of split-resonant rings to enhance isolation and suppress coupling;then we carried out the theoretical analysis and experimental verification of the corresponding decoupling principles.These research results have certain application value for the decoupling of UWB antenna arrays.3.Research on mutual coupling reduction of using bidirectional absorbing metamaterial.In view of the limitation that most electromagnetic absorbing materials only have single-side absorbing effect,a bidirectional absorbing metasurface is proposed.We studied its theoretical basis for achieving the bidirectional absorption effect,and applied it to a single-band binary antenna array.Then we proved its reliability through simulation analysis and experimental verification.This research should make an important contribution to the field of mutual coupling reduction by using metamaterials.This thesis adopts different decoupling methods to effectively suppress mutual coupling between different types of antenna arrays.The principles of decoupling are researched and discussed,and its feasibility is verified.It provides multiple possibilities for enriching the mutual coupling reduction of the antenna array,and it has certain potential practical significance.