https://devzone.nordicsemi.com/f/nordic-q-a/71187/nrf52811-clarification-on-pcb-antenna-designHello, I am using the nRF52811 for my project. I am in the layout design phase...almost completed and I need some clarifications before I launch the first Proto. I don&#39;t have experience with RF design so, I read a lot and I am using the nRF52840 Dongleen-USTelligent Community 13Tue, 02 Feb 2021 14:35:07 GMThttps://devzone.nordicsemi.com/thread/292514?ContentTypeID=1Tue, 02 Feb 2021 14:35:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c53fa6ae-1e8a-440b-bcf7-48728cd770e5ketiljo<p>1. Yes, it&#39;s correct that there are no ground plane under the antenna.</p> <p>2. The dimensions of the dongle are nor critical. But as all radio designs, the larger the ground plane you have, the better antenna gain you will have. To a certain point of course.&nbsp;</p> <p>3. The best is usually to cut the track at the 50 ohm point and solder a thin coaxial cable to the board. Calibrate the VNA with the cable so that the reference point is at the end of the cable.&nbsp;</p> <p>4. Place the connection at the 50 ohm point, so between the matching network (C3 / L1 in the ref schematic) and the pi-filter.</p><div style="clear:both;"></div>