matching circuit

Question

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

Bendik Heiskel · Answer

Hi. 
 A PI matching network is recommended for the nRF52840, so an shunt capacitor should be added between L1 and the connector . 
 
 The footprint of a additional capacitor is added in the nRF25840DK, this capacitor is optional but nice to have if the connector and antenna needs tuning. 
 
 Best regards, 
 Bendik Heiskel