Solutions Overview
RF connector selection
A few factors should be consider first
1. The selected RF connector should meet the frequency range actually used.
2. Under normal circumstances, the electrical performance of the straight RF connector is better than that of the curved one, and can be selected according to the actual use.
3. The selected RF connector should have a smaller standing wave ratio.
4. The selected RF connector should have a small insertion loss.
5. The selected RF connector should match the impedance of the mated RF connector or cable.
6. The EMC of the threaded RF connector is better than any bayonet or push-pull RF connector.
7. When there is an IM requirement, consider the material and plating of the RF connector.
8. When the universal RF connector meets the requirements, high-performance RF connectors are not used.
The metal component of a good RF coaxial connector should be able to maintain its physical state at a certain temperature without changing it, thus ensuring its high performance. It is usually stipulated that it should withstand a maximum of 200 degrees and a minimum of minus 65 degrees. The effect of humidity on the RF coaxial connector is the effect of water. Because water is corrosive to metal components, it also has a certain conductivity, which can reduce the insulation. Therefore, the component materials of the connector must have the least influence on water. The RF coaxial connector should be capable of operating at least 90 hours at a relative humidity of 90%-95% and a temperature of about 40 degrees. Salt spray is the salt contained in moisture, which can cause chemical corrosion to metal components and affect the electrical performance of RF coaxial connectors.
An RF connector is generally considered to be an element attached to a cable cable supplier or mounted on the instrument as an electrical connection or separate component of the transmission line. RF connectors are mechatronic products that primarily serve as bridges.
The actual electrical performance depends on the performance of the cable, the contact of the cable, the geometry of the connector, the contact of the inner conductor, and the like. The maximum frequency of the coaxial line must be the maximum frequency of use of the weakest component in the transmission line, as it depends on all components and not on a certain component. For example, a connector is used at 10 GHz, the cable connected to it is used at 5 GHz, and the maximum frequency of use of this component is 5 GHz. The combination of all factors determines the frequency of use of the entire transmission line.

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