The QLS is a quick locking replacement for the threaded interface of the popular SMA connector

SMA connector

SMA connectors are coaxial RF connectors developed in the 1960s as a minimal connector interface for coaxial cable with a screw type coupling mechanism. The connector has a 50 Ω impedance. It offers excellent electrical performance from DC to 18 GHz.-Connector design:The SMA connector consists of...

. Designed and manufactured jointly by German-based RF and Microwave

Microwave

Microwaves, a subset of radio waves, have wavelengths ranging from as long as one meter to as short as one millimeter, or equivalently, with frequencies between 300 MHz and 300 GHz. This broad definition includes both UHF and EHF , and various sources use different boundaries...

 component suppliers Telegartner and IMS, this new connector emerged in 2006 as an answer to some of the shortcomings of the original QMA

QMA and QN connector

QMA and QN connectors are quick-connect RF connectors that were designed to replace the widely used SMA connector and Type N connectors. The connectors have been available since 2003...

: Improvements in this version include: A strong locking mechanism that makes it very difficult to accidentally detach the connector and a longer life-span.