I would like to add an Hirose U.FL antenna connector to my PCB. I have no previous experience of using them, so I would like to now if I should connect both of the GND pins to the PCB ground or it's enough to connect one of them. I found this PCB trace.
You should connect both pins for two reasons:
- Maintain 50 Ohm impedance - With one pad only, the impedance is not guaranteed to be 50 Ohms.
- Mechanical strength - A single pad is more likely to fail than two pads when pulling out the mating connector.