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What is an SMA Connector?
The SMA connector is one of the radio frequency connectors developed in the 1960's to make it easier to connect coaxial cables. Using a screw-type design, the SMA connector allows for a quick connection; and can be used in both alternating and direct current applications.
What Does the SMA Connector Look Like?
The SMA connector is designed for screw type connection, rather than the push and pull technology that is often used with other connectors. Often constructed with stainless steel or brass, the SMA connector utilizes a 0.250x36 thread, with the male connector including a .312 hex nut.
Ratings for the SMA Connector
The average SMA connector is rated with a mode free operation that may range from DC to 18 GHz. However, there are some customized versions of the SMA connector that will rate as high as 26.5 GHz. While there are adapters that will increase the rating, it is generally not recommended to utilize an SMA connector for anything above the 26.5 GHz for more than a short period of time, since the result will be to shorten the life of the connector.
How to Make a Connection with an SMA Connector
While the SMA connector is made of metal, it is important to note that the connector can be damaged if undue force is used during the connection process. Typically, it is a good idea to use wrench that will fit snugly around the nut, but is not likely to crush the nut during the turning process. While tightening the nut, it is a good idea to make sure the rest of the connector is not rotating as well. Rotation of the rest of the SMA connector can lead to wear and tear on the connector, thus shortening the life of the device. It is also a good idea to check the connector before connection, since it is possible for debris to collect in the body of the connector. This could decrease the quality of the connection. If the SMA connector is handled properly, it should last for in excess of five hundred couplings.
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