Don’t worry, your secret is safe with me ... and has a bandwidth somewhere around 5GHz. SMA connectors were developed in the 1960s, have a 50 ohm constant impedance and a bandwidth of up ...

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 ...