Basic knowledge of coaxial cable connector

Many standard connector formats, such as the d-connector and many other multiplexers, consist of a series of pins with parallel connections to each other. Coaxial cable connectors are often very different and have some fairly different characteristics.

1, the shielding

Because radiofrequency signals can radiate, on the contrary, it is often necessary to prevent foreign matter from being picked up. Therefore, the RF connector continues to shield coaxial cables as part of its nature.

2. Circle:

RF coaxial connectors need to maintain the coaxial characteristics of the cables used with them, so they are round. Therefore, they include the center pin for the interior of the coaxial cable, and then the interior external connection for the exterior conductor on the cable.

3. Characteristic impedance

The characteristic impedance of a feeder or coaxial cable is very important. Any mismatch causes the power to be reflected back to the source. It is also important that the characteristic impedance of the RF coaxial cable connector matches the characteristic impedance of the cable. If not, discontinuities are introduced and losses are caused, but in practice, this may not affect most installations with usage rates as high as 250 MHz or so. Most RF connector of 50 Ω, but for some domestic applications, other impedance, such as 75 Ω available, as well as other applications such as data transmission impedance.

4, usually used for coaxial cable male head, female head fixed

Unlike other forms of connectors, the connector that provides the signal or power is the female connector, which is more protected and less likely to be shorted, and may not be applicable to RF connectors. Connectors on the leads here tend to be convex, while connectors installed on the device tend to be concave, although standard connector conventions can be used in a few cases.

5. Cable type

Because different types of coaxial cables come in different sizes, different types of coaxial connectors can be used to fit a given type of cable. It is important to ensure that the correct RF connector variant is used with the associated coaxial cable, otherwise the connector will be difficult to install, and if it does work reasonably, even though it can connect the coaxial cable and the RF connector may not be satisfactory.

There are a variety of connectors for RF applications. Impedance, frequency range, power handling, physical size, and many other parameters (including cost) will determine the best type for a given application.

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