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What factors should be considered when selecting an RF connector?

Time:2018-10-22

An RF connector is a type of connection device in an RF transmission system that transmits RF signals with small losses and reflections and provides fast and repetitive connections. Mainly composed of contact parts, insulators, housings and accessories.
   
The RF connector should be reliable in contact, have good conductive insulation performance, have sufficient mechanical strength, and the number of insertions and removals meets the requirements of international and domestic standards. At the same time, there are many factors that determine the connector family and style, where the mating cable and frequency range of use are the main factors. Professional connector manufacturer Shenzhen Tiankele company 12 years of research and development qualification Song engineers believe that the choice of RF connectors should consider the following factors:

1) Frequency The frequency range determines the series in which the connector is used. Usually at lower frequencies (below 6 GHz), push-in locking or bayonet snap-on connectors are used. Threaded locking connections are typically used in high performance, low noise environments.


2) Impedance Usually the specification of the cable determines the impedance of the connector. 50 and 75 ohms are the two most used standard impedances, while many connector series have 50 ohms. Sometimes at frequencies below 500 MHz, a 50 ohm connector can be used on a 75 ohm cable (and vice versa) and performance is acceptable. The reason for this is that the typical 50 ohm connectors are cheap and they are widely used.


3) Insulator Materials In addition to matching cables and connectors as closely as possible to minimize errors, RF connector interfaces and insulator materials are also important considerations. Linear butt and air-connected interfaces (such as SMA and N-type interfaces) provide high-frequency, low-reflection performance, while overlapping dielectric surfaces (such as BNC and SMB) are often limited in frequency and reflectivity. A chart that typically reflects connector performance is a table of reflection coefficients. This is a measurement method that describes how much the signal is reflected back from the connector. It can be expressed in terms of reflection coefficient, voltage standing wave ratio (VSWR) and return loss.


4)Power and Voltage In some special application studies, power and voltage requirements are also a factor in determining the connector. High power applications require large diameter connectors (eg 7-16DIN and HN types). The general transmission power is determined by the transmission power of the electricity bill, which is usually determined empirically. The voltage breakdown level is determined by the peak voltage. Power transfer capability decreases with frequency and altitude.

Tiankele's product advantages:
1. Deeply research and development before proofing to help you avoid unnecessary RF connector factors, and give suitable solutions and tailored design drawings for reference.
2, full-time follow-up, let you keep abreast of product production and delivery process
3, complete industrial chain, advanced laboratory, complete testing tools, 10 years of professional team, let your product quality and delivery worry-free

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