RF coaxial connector VSWR influencing factors

RF coaxial connectors are indispensable and critical electromechanical components in radio electronic systems, electronic equipment and instrumentation. It not only plays the role of mechanical connection, but also ensures the smooth transmission of electromagnetic signals and electromagnetic energy. VSWR is a key electrical parameter to measure the electrical performance of RF coaxial connectors. VSWR is essentially the reflection of the uniformity and reflection of the characteristic impedance of the transmission line (radio frequency coaxial connector) transmission system. It also reflects whether the connector is matched and matched to the system in the electronic system. Therefore, the VSWR performance of the RF coaxial connector directly affects the performance of the system using the RF connector. Therefore, in the radio frequency connector product standard and the application of radio frequency coaxial connectors, clear requirements for its VSWR performance are put forward. For the above reasons, the VSWR problem of RF coaxial connectors is a matter of great importance and concern for designers, manufacturers and users. How to reduce the VSWR of RF coaxial connectors has always been a topic discussed by designers. Let’s discuss the factors affecting the VSWR of RF coaxial connectors today.

Any kind of RF coaxial connector such as sma connector, smp connector needs to go through the processes of design, production and processing, assembly, testing and inspection before it can become a qualified product for installation and use. In the process of forming qualified products, the VSWR of the product is involved, that is, all are related to the VSWR of the product, so there may be factors that affect the VSWR of the product.

(1) When designing, the impact of improper application of the three basic design principles of rf connectors.

The three basic design principles for the development of broadband precision coaxial components are not only applicable to precision coaxial connectors, but also to all RF coaxial connectors with VSWR requirements. Therefore, the three basic design principles are currently necessary for design Principles of compliance. The main points of the three basic design principles are:

·

Keep a constant characteristic impedance as much as possible on each cross section of the connector.

impedance

The dimensional tolerance of the conductor in the coaxial original

(2) The influence of structural parameter deviation on VSMR

Machining tolerances; different axis degrees; slots on the inner and outer conductors; axial gaps on the inner and outer conductors

(3) The influence of the axial position of the insulation support and the structural design on the characteristic impedance

(4) Transitional design

(5) Surface roughness

(6) Conductor plating

(7) Improper assembly

(8) Defects of the test system

(9) Improper production and processing missed inspection

To reduce the VSWR of the RF coaxial connector, it must go through the whole process of product formation, that is, from the product design, production and processing, assembly, test and inspection process, according to different stages, different concerns, specific analysis of specific issues, and adopting to reduce the voltage standing wave ratio Measures, careful design is to lay the structural foundation for low VSWR, careful processing and assembly are the guarantee for the realization of structural design, and only good testing equipment can objectively reflect the true performance of the product.

As for the impact, how to take effective measures, let's discuss it together next time!