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SMA and millimeter connector structure

Author: Date:9/28/2019 1:43:33 AM
  The SMA connector is designed for use in the 0.141" precision connector for microwave applications in the military industry. Due to the small size of the SMA connector, it can be used at higher frequencies (the frequency range of the semi-hard cable is DC ~ 18 GHz; Working under DC ~ 12.4 GHz when connecting a flexible cable, it quickly became popular. Even millimeter connectors (such as 3.5 mm, 2.92 mm) that were later developed were considered to be compatible with their machines.

   What is a 3.53.5mm connector, which is a connector with an outer conductor of 3.5mm inside diameter, a characteristic impedance of 50Ω, and a connection mechanism of 1/4-36UNS-2 inch thread. The biggest difference from the SMA connector is that the 3.5mm air medium is used. The outer conductor of the 3.5mm connector is thicker than the SMA connector and has better mechanical strength than the SMA connector. Therefore, not only the electrical performance is better than the SMA connector, but also the mechanical durability and performance repeatability are higher than the SMA connector, so it is more suitable for the test industry.

The 2.92mm connection is an RF coaxial connector with an outer conductor inner diameter of 2.92mm, a characteristic impedance of 50Ω, and a connection mechanism of 1/4-36UNS-2 inch thread. Its structure is similar to that of a 3.5mm connector, but it is smaller. 2.92mm connector has good electrical performance in the range of DC ~ 46GHz, and can be mechanically compatible with SMA connector and 3.5mm connector. It is quickly recognized by many manufacturers and becomes the most widely used millimeter connection in the world. One of the devices.