Do you know how Powerful SMA RF Coaxial Connectors are?

Author:szshlink 2020-11-05 15:24:00 286 0 0

As an SMA Type Adaptors Factory, share with you. With the popularity of wireless applications, the demand for SMA Male to Female Connectors has grown exponentially. We took a closer look at these connectors and the challenges they face in providing robust data transmission.

SMA Male to Female Connectors

SMA Male to Female Connectors

Various electromechanical solutions have been developed to facilitate board-to-board connections and power and data transfer. The versatile SMA RF coaxial connector is one of the top choices for test and measurement, communications, broadcasting and wireless technologies.

For antenna applications, an ultra-small A (SMA) solution that provides a bridge between RF and microwave is available for standard and reverse polarity. They are usually designed for the frequency range from DC to 18GHz, have a characteristic impedance of 50Ω, and have a screw-type coupling mechanism to enable secure connections even in high vibration environments.

The SMA product category includes stand-alone connectors and pre-assembled cable assemblies with adapters that allow multiple standard SMA solutions to meet a wide range of application needs. Connector options include PCB and panel mounting options with right-angle or straight orientation, bulkhead and flange mounting options for rear mounting, and multiple termination types based on the style selected.

The transmission efficiency is addressed by strengthening the mechanical features in the connector. Many SMA RF coaxial connectors on the market use a right-angle configuration as the main reference point and are designed to maintain impedance at 50Ω. Due to internal mechanical constraints, single-pin and soldered two-piece pin designs are the most widely used. Impedance mismatch may be caused by internal mechanical structure failure, inaccurate dimensions, and incorrect solder paste volume at the two-piece design solder joint. 

Another consideration in the design of right-angle SMA RF coaxial connectors is the volume of air around the contacts, as impedance mismatches typically occur at the bends of the center contact. In a two-piece design, the volumes of air and PTFE must be accurately calculated to minimize impedance mismatches.

The volume of air around the contacts in a right-angle SMA RF coaxial connector has a direct effect on impedance mismatch.

The time domain reflection (TDR) chart below shows that the impedance on the two solder pins deviates by 50Ω. This is usually caused by an incorrect amount of air compensation at the joints and / or due to poor internal design.

This time domain reflection (TDR) comparison illustrates the discontinuities in single-pin and solder pin center pin designs.

Our company also has RF Coaxial Cable Assembly of IPEX on sale, welcome to consult.



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