RF launch for the board edge
The 901-10044-6RFX: The end-launch mounting puts the connector body flush with the PCB edge — the centre contact and ground plane transition directly into the board trace, keeping the impedance through the launch clean.
What the 18 GHz and 500 cycles mean on the bench
The 18 GHz max frequency and 50 Ohm impedance are the pair that decide fit — if your signal chain runs below 18 GHz and the system impedance is 50 Ohm, this connector holds the line without a mismatch. The 500 mating cycles, backed by the gold-on-gold contact surfaces, mean it survives repeated connects in a test rack or field-swap scenario without the contact resistance drifting.