1. Characteristic impedance Like other microwave devices, characteristic impedance is a very important indicator, which directly affects the standing wave ratio, operating frequency and insertion loss. Common characteristic impedances of SIM card socket connectors are 50Ω and 75Ω.

2. Insulation resistance Insulation resistance refers to the resistance of the insulating material, which depends on the insulating material in the joint, such as polytetrafluoroethylene. The typical value of insulation resistance is greater than 5GΩ (N type). If the indicator of the sim card holder is not good, leakage current will occur.

3. Operating frequency range The lower limit cutoff frequency of the RF coaxial connector is zero, and its upper limit operating frequency is 95% of the cutoff frequency. The operating frequency depends on the construction of the connector. Generally speaking, the smaller the size of the outer conductor, the higher the operating frequency of the connector: the lower the dielectric constant of the filling medium, the higher the operating frequency and the lower the insertion loss. The high operating frequency of the coaxial connector can reach 110GHz.

Fourth, the durability of the connector (pulling out life), when the connector and the standard connector to which it is connected completes the cycle of complete engagement and complete separation, even if it is pulled out once. The MIL_C-39012 standard specifies the plug-in life of RF connectors. For example, under the premise that the n-type connector is pulled out 12 times per minute, the pull-out life should be more than 500 times. After 500 times of pull-out, the connector should have no obvious mechanical damage, and the mating functions remain unchanged.

5. Contact resistance refers to the contact resistance of the radio frequency connector refers to the resistance of its contact point, which refers to the contact resistance of the inner conductor and the outer conductor respectively. Obviously, the smaller the value, the better, usually in the order of mΩ, and the contact resistance of the outer body is smaller than that of the inner conductor.

6. The connection torque of the connector is related to the connection torque of the connector. The indicators given by different manufacturers are not completely consistent because of the different materials selected. The connection torque of stainless steel connectors is greater than that of copper connectors. The higher the connection torque, the higher the durability of the connector.

So today's explanation is here first. The above is the whole content of today. I believe that everyone has a certain understanding of the factors that endanger the performance indicators of the sim card socket connector. Thank you very much for your patient reading. If you want to know more about the sim card holder, you can call the service hotline in the upper right corner to consult with us.