https://devzone.nordicsemi.com/f/nordic-q-a/60868/nfc-antenna-tuningI have a product which uses the nRF52840 SoC that will also have NFC functionality. The housing of the PCB is sort of forcing a custom design for the NFC Antenna. We need an antenna in a coil shape (rather than the square loop antenna the 840 DK comesen-USTelligent Community 13Mon, 04 May 2020 11:20:41 GMThttps://devzone.nordicsemi.com/thread/247828?ContentTypeID=1Mon, 04 May 2020 11:20:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:89907089-5a9f-47cb-ae7d-7c9ac2d443b3Marjeris Romero<p>Hi Sam,</p> <p>The <a href="https://nfc-forum.org/">NFC forum</a> has quite a few reference designs you can use for your NFC antenna.</p> <p>Usually the shape of the antenna plays a minor part, as long as the center opening of the antenna is about the same size of the antenna on the reader.&nbsp;</p> <p>And yes, you can use the antenna tuning service when you are finished with a prototype. Just make a private ticket here in Devzone and attached both your schematic and layout design for review so we can proceed with tuning.</p> <p>We also have a whitepaper about NFC antenna tuning which is good to read here: <a href="https://infocenter.nordicsemi.com/topic/nwp_026/WP/nwp_026/nWP_026_intro.html">https://infocenter.nordicsemi.com/topic/nwp_026/WP/nwp_026/nWP_026_intro.html</a></p> <p>Best regards,</p> <p>Marjeris</p><div style="clear:both;"></div>