https://devzone.nordicsemi.com/f/nordic-q-a/54871/antenna-selection-for-fr4-layoutHi, we are working on custom board using nRF52811 SOC, I have some confusion 1. regarding the antenna design, I copied the Antenna from Dev board, but it is designed for 1.6mm FR4 board, while i am planing for 0.6mm or 0.8mm, so will the calculationen-USTelligent Community 13Tue, 26 Nov 2019 14:15:08 GMThttps://devzone.nordicsemi.com/thread/222132?ContentTypeID=1Tue, 26 Nov 2019 14:15:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4be6196c-8615-4810-a1c9-4e30570c2220ketiljo<p>As the antenna runs along the top of the PCB, the reduction factor is somewhere between free air and RF4. But the actual length of the antenna can change a bit depending on the size of your ground plane. So the best is to make the antenna ~25 mm long and trim it to max range after you get the PCBs back. If you have access to a VNA, you can use this to measure the resonant frequency of the antenna and trim it to 2.44 GHz.</p><div style="clear:both;"></div>