901-9218-SF is the designations for coaxial connectors. It is a type of RF adapter among which there are four categories:

  • Connector,
  • Adaptor,
  • Converter,
  • Coupler.

The purpose of a RF adapter is to allow a connection between two incompatible parts, e.g. from transmitter to receiver or from GPS to Tracker Interface. A typical example is a variable – gain Antenna adapter allowing a signal to be adjusted from high level to low level, or from low level to high level in order to achieve attenuation. It is also used for impedance matching in certain cases.

The 900-9218-SF model of RF adapter is made of gold plated brass material with waterproof brass bodies and elastomeric rubber seals. It is designed with a durable dust cap for protection against environmental elements. This adapter has a higher IP rating than other adapters and is suitable for applications in commercial and industrial environments.

The type of connections available from the 900-9218-SF is a push-on RP-SMA (Reverse-Polarity-Sub Miniature- A type) total gold plating at connector port. A typical connection using this model of adapter may involve connecting a RP-SMA to a SMA antenna. This helps in maximizing performance of the external wireless device.

The working principle is that this adapter allows for the connection of two surfaces that would not be joined effectively. As the RF signal travels through the adapter, it is attenuated in accordance with the frequency range and the impedance mismatch at the two ends. That means it is not suitable for high frequency applications. The adapter also provides a certain amount of signal gain depending on the impedance mismatch at both ends.

The primary benefit of the 900-9218-SF adapter is that it is reliable in applications which require a high degree of repeatability and accuracy. An additional advantage is that they are fairly durable in the presence of an environmental elements.

In conclusion, the 900-9218-SF adapter is an example of a reliable and durable RF adapter and is particularly well suited for applications which require an accurate and consistent signal transmission. It provides a high degree of impedance matching, attenuation, and signal gain depending on the specific application and impedance mismatch.