https://devzone.nordicsemi.com/f/nordic-q-a/78639/layout-of-bluetooth-antenna-tunning-circuitHello, my question concerns the layout of a bluetooth antenna &amp; tuning circuitry for an nRF52832. Specifically, about two separate concerns: 1) Due to the shape of the PCB, the antenna is intended to be placed on an extruding part of the board,en-USTelligent Community 13Mon, 16 Aug 2021 13:20:29 GMThttps://devzone.nordicsemi.com/thread/325142?ContentTypeID=1Mon, 16 Aug 2021 13:20:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d589d418-c619-440e-922a-c3996111fadcKaja<p>Hi,<br /><br />the radio matching network should be placed close to the radio and the antenna matching network should be placed close to the antenna:<br /><img alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/3683.impedanceGe.png" /></p> <p>The transmission line between the two matching network should be a 50 Ohm coplanar wave guide:&nbsp;<br /><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1629119862427v1.png" alt=" " /><br /><br />The length, L, does not matter in theory, but a very long RF path is not optimal, but 15-20 mm is not a problem.<br /><br />The reference design, is under <a href="https://www.nordicsemi.com/Products/nRF52832/Download#infotabs">downloads </a>on the product page; <a href="https://www.nordicsemi.com/-/media/Software-and-other-downloads/Reference-Layouts/nRF52832QFAxRefLayoutv11.zip">QFN</a>.<br /><br /><br /></p> <p>We are happy to do HW review of your design, if you want it to be private, create a private ticket, with the topic HW review.&nbsp;<br /><br />Best regards,<br />Kaja</p><div style="clear:both;"></div>