https://devzone.nordicsemi.com/f/nordic-q-a/34582/nrf52810-custom-board-checked-antenna-and-programme-pinsHere is my custom board. Please cheked programme pins and antenna. drive.google.com/.../1g48MeUplQbf9bIkzCKamLfL-1tCA3T6pen-USTelligent Community 13Tue, 22 May 2018 12:34:35 GMThttps://devzone.nordicsemi.com/thread/132764?ContentTypeID=1Tue, 22 May 2018 12:34:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4743cbd3-f311-4e92-819a-12a747b793ddAndreas<p>Hi,</p> <p>&nbsp;</p> <p>C16 should be movedall the way towards the antenna, and the antenna feed trace (between L1 and C16 after moving) should have ground on both sides in the top layer. Also, J1, J2, J3, J4, J13 and J14 will have a negative impact on the antenna when placed this close.</p> <p>&nbsp;</p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>