It is a constant impedance connector available in both 50 ohm and 75 ohm versions, and has a bandwidth somewhere around 5GHz. SMA connectors were developed in the 1960s, have a 50 ohm constant ...

An SMA edge connector may be designed to present a characteristic impedance of 50Ω typically, but that is to the end of the connection pins. Once it’s soldered down, there is a discontinuity ...

SMA feedthroughs deliver reliable performance ... with either grounded or floating shield configurations with up to four male ...