Electromechanical Coupling Modeling and Experiment of RF Connector Assembly Displacement

RF connectors are essential components in RF and microwave systems. During the assembly process of RF connectors, changes of assembly displacement will cause changes of contact status, thereby affect the integrity of the transmitted signal. Aiming at the problem that assembly displacement changes of interconnected RF connectors affect the electrical properties of transmission, this paper builds an experimental platform for measuring the assembly displacement and scattering parameters of RF connectors to study the impact of the assembly displacement on electrical signals. Based on the microwave network theoretical analysis, the equivalent circuit of the contact area is introduced. The equivalent circuit is converted into a port network and is cascaded with the RF connector port network. A field-circuit coupling model of interconnected RF connectors under the influence of the assembly displacement is constructed. An experimental platform is constructed according to the constructed field-circuit coupling model to measure the scattering parameters of RF connectors under different assembly displacements. The mapping relationship between the assembly displacement and the contact area impedance is fitted from the experimental data. Finally the electromechanical coupling model of the RF connector assembly displacement is constructed.By building an assembly displacement experimental platform, the effectiveness of the coupling model is verified.