Research On The Structure Of Millimeter Wave Radio Frequency Coaxial Connector

In recent years,China’s high-tech industry has developed strongly with the support of policies,and the requirements for communication technology are becoming higher and higher.As a relatively new spectrum resource,millimeter-wave band has broad application prospects.Millimeter-wave radio frequency coaxial connector is a precise connector whose working frequency is over 30 GHz.It has high quality of signal and communication,strong anti-interference ability,wide bandwidth and narrow beam.It is often used in wireless communication,aerospace and other fields.At present,due to the insufficient accumulation of basic theoretical research,design experience and manufacturing technology,there is still a big gap between the R&D level of millimeter wave coaxial connectors in China and the leading international enterprises in the industry.In this paper,the structure of a millimeter-wave radio frequency coaxial connector is studied in depth.Firstly,the cantilever beam model of internal and external conductors simplified by millimeter-wave radio frequency coaxial connector is analyzed theoretically by material mechanics theory.Then,the contact pressure and stress nephogram of the model in the process of insertion are obtained by finite element simulation of static structure.On the other hand,according to the theory of coaxial microwave transmission and the design principle and design method of millimeter-wave radio frequency coaxial connector,the influence factors of the structure of the connector model on the transmission performance of high-frequency signal are analyzed.The cut-off transmission frequency,characteristic impedance,offset compensation size and insulation support size of the connector are verified,and the insertion loss and accumulated return loss of the product are rationalized.On this basis,the finite element simulation of millimeter-wave radio frequency coaxial connector model for high-fr-equency transmission performance is carried out,and the insertion loss and cumulative return loss are obtained.Finally,the influence of the key dimensions of the connector,the groove depth of the insulation support,on the S parameters is analyzed.Combining with the current processing capacity and S-parameter curves,the optimal range of the groove depths of the insulated support is given,and better high-frequency transmission performance parameters are obtained.In this paper,through theoretical analysis and simulation,the performance indicators of the connector are verified.The mechanical performance and high frequency transmission performance of the connector are good.The resear-ch results are in line with the plug-in force standard of millimeter wave radio frequency coaxial connector and the requirements of high frequency signal transmission performance.