matching circuit

[mustafa.muna]

hello

I am using ufl(U.FL-R-SMT(01)) 50 ohm antenna
My question is: is the matching circuit listed in the picture sufficient or do I need another component

[Veronica]

To do the antenna tuning, should we remove the balun matching network? And a capacitor should be placed between the coaxial cable and antenna network matching? is this only for impedance measurement? Should be the PCB bare?

when we connect the VNA to an assembly device should be all the matching networks connected?