QMA Series QMA – subminiature connectors Description Content HUBER+SUHNER QMA coaxial connectors are according to Description 263 QLF standard and available with 50 Ω impedance. The Interface dimensions in mm/inches 263 frequency range extends to 18 GHz, depending on the Features 263 connector and cable type. However most of the QMA connec- Technical data 264 tors are return loss optimised for frequencies up to 6 GHz. The Cable connectors 266 interface is based on the SMA dimension but instead of a Receptacles 275 threaded coupling mechanism a new snap-lock mechanism is PCB connectors 277 used. Protection caps 279 QMA eXtreme – XQMA 280 The QMA interface has a very similar performance to the Calibration 281 SMA, but in addition it offers an easier, faster and safer coupling operation, helping customers to save significantly time during production. The packaging density of QMA is increased compared to SMA connectors thanks to the fact that no torque spanner is required to fasten the coupling nut. QMA is not intermateable with SMA. QMA connectors are also available as waterproof version (IP68) and are compatible with QLF standard. Interface dimensions (mm/inches) Plug (male) Jack (female) Features • Easy to mate • 10 times faster than with threaded SMA • Increased reliability • No torque or tooling required • 360° rotatable interface • Easy routing of cable assembly without mechanical stress or electrical performance degradation • Higher packing density • Size equivalent to SMA, but space saving as there is no need for wrench clearance • Excellent electrical performance • Consistent VSWR performance enables to replace standard SMA • Return loss optimised DC to 6 GHz www.qlf.info HUBER+SUHNER RF connectors – QMA 263
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