​Introduction of SMA connectors
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​Introduction of SMA connectors

Views: 0     Author: Site Editor     Publish Time: 2022-02-08      Origin: Site

As a kind of radio frequency connector, the SMA connector has been widely cited in the communication industry. The following will briefly introduce some basic information about SMA.


What are SMA connectors?

How to distinguish the many types of SMA connectors?

What is the function of SMA connectors?


What are SMA connectors?

The SMA connector pair is an example of a coaxial connector. The figure shows the inner conductor for mating, the dielectric layer, and the outer conductor for locking. Generally, the male plug has a protruding center conductor and an internal locking thread on the outer conductor. The socket has a recessed inner conductor and an outer locking thread. It should be noted that the locking threads of some "reverse polarity" connector types are reversed, with the external thread on the upper male plug and the internal thread on the female plug. Other locking mechanisms may include twist locks, bayonet connections, or snap-lock rings.

Similar to this SMA connector pair, most coaxial connectors distinguish between male and female, and the two halves have different structures. Some connector nodes have the same structure on each side. These are mainly high-precision connectors for laboratory applications.

SMA connectors

How to distinguish the many types of SMA connectors?

There are many types of SMA connectors.

1. From the connection of the interface, there are male and female.

2. For the connection method, some SMA connectors can be directly inserted on the side of the PCB. If it is not convenient to insert on the side, it can be inserted on the top of the PCB. The middle is the signal, and the surrounding four pins are ground.

3. Others are fixed with screws, mainly used for sidewall connection of radio frequency circuits with shielding boxes. There are four screws and two.

4. For the side-inserted SMA connector, there is a small metal square block between the pin and the rib. When designing the PCB, you can make a recessed groove at the pad of the SMA connector, which just fits. Housing the small square can make the connector not only fixed to the PCB by soldering tin, but also fix the SMA on the mechanical structure, and because the small square is recessed close to the circuit board, it looks neat in appearance.


What is the function of SMA connectors?

SMA series connector is a widely used coaxial connector with a small threaded connection. It has a long, superior performance and high reliability. It is widely used in radio frequency coaxial cables or microstrips of microwave equipment and digital communication equipment.

It is often used for the GPS clock interface on the single board and the measurement port of the radio frequency module of the base station on the wireless equipment.


There are many types of SMA, each of which has its special application. Choosing the correct SMA connector can maximize its value. At the same time, the quality of the SMA connector will also affect its function. LenoRF, as a Chinese pioneer in RF interconnects, can ensure the products’ quality and the after-sales service for any product. Customers can order their products with confidence.


Zhenjiang LenoRF Industry co. LTD- LenoRF ™ ,is a special manufacturer for RF coaxial connectors,cable assembly and Passive Devices. It occupies an area of 30 hectares with the existing building of 2000 square meters.The company is equipped with a lot of the world most advanced equipment and apparatus for production

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