Analysis of RF coaxial SMA connector(2)

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2021-11-12

3.Rated power of SMA connector

In some cases, the power rating of the SMA connector may be important. The key parameter that determines the average power handling capability of a coaxial connector is its ability to deliver high current and keep the heat up to a moderate temperature.

The heating effect is mainly caused by the contact resistance, which is a function of the contact surface area and the way the contact pads are together. A key area is the center contact, which must be formed correctly and fit together well. It should also be noted that the average power rating decreases with frequency because resistive losses increase with frequency.

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The power processing data of SMA connectors varies greatly between manufacturers, but some figures indicate that some can handle 500 watts at 1 GHz, which drops to slightly less than 200 watts at 10 GHz. However, this is also measured data and may be more practical. Taller.

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1. Analysis of RF coaxial SMA connector(1)