The QMA connector series was developed as a quick mating replacement for the standard SMA connector. With identical internal construction, the connector exhibits the same RF performance characteristics and mechanical durability with the added benefit of a 360º rotating snap-on locking interface. This snap-locking design improves packing density as no torque wrench clearance is necessary. While operating up to 18 GHz, like SMA the QMA connector exhibits best performance up to 6 GHz. The series is not standardised by any international body, instead being an industry standard under the QLF® Alliance.
History
The connector was developed in 2003 by the Quick Lock Formula Alliance, which consists of Huber+Suhner, Radiall, Rosenberger, and Amphenol.
Applications
QMA connectors can be found anywhere traditional SMA connectors are used, but are most commonplace in cellular base station hardware, SCADA radios, and a range of wireless test equipment. QMA connectors are also found in military hardware such as radar and satellite systems, where durability, strength, and quick-disconnection features are desired.