https://devzone.nordicsemi.com/f/nordic-q-a/39224/full-flex-pcbHi We&#39;ve developed a wearable device and are changing from a rigid PCB to a full flex PCB. I want to know what adjustments is needed for RF output because of this change. Thanksen-USTelligent Community 13Tue, 09 Oct 2018 13:26:14 GMThttps://devzone.nordicsemi.com/thread/152227?ContentTypeID=1Tue, 09 Oct 2018 13:26:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:65954a69-d056-4dba-ab88-fffc7b436614Marjeris Romero<p>Hi Werner,</p> <p>You can follow our reference design which can be downloaded from <a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf51%2Fdita%2Fnrf51%2Fpdflinks%2Fref_layout.html&amp;cp=3_6">here</a>. The only change you will need to do is to adjust the values of the components of the nRF5x matching network to make sure the transmission line between the nRF5x matching network and the antenna matching network remains at 50 ohms, since a thinner substrate will alter this. If you want you can also send your design (schematic &amp; layout) to us for review before production.</p> <p>Best Regards,</p> <p>Marjeris</p><div style="clear:both;"></div>