The sma series is a very popular coax connector with threaded coupling and can be used up to frequencies of over 18 ghz depending on type the impedance is controlled at 50 connector styles are available for flexible conformable and semi rigid cable types versions of the sma connector are available for mounting to printed circuit boards using both through hole soldered and through hole press fittechniques as well as surface mount types smd solder crimp and clamp techniques are used