https://devzone.nordicsemi.com/f/nordic-q-a/49621/nrf51822-layoutHello. C21, L5 and C22 are part of antenna matching. And, L6,L7,C23, C17,C19,L4,C20 they suppress the harmonics and spurious responses and match the chip to 50 ohm. R19 is a zero resistor working as a wire connection. RF line is set to be 0.9mm widthen-USTelligent Community 13Thu, 11 Jul 2019 07:56:21 GMThttps://devzone.nordicsemi.com/thread/197728?ContentTypeID=1Thu, 11 Jul 2019 07:56:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9bba376c-0148-45b1-83fa-e95f2c50e9bdKaja<p>Hi,&nbsp;<br /><br />it looks fine, there are just some small deviations form the reference layout, it&#39;s easier to give you&nbsp;a full review,&nbsp;if you upload the hole schematic and layout.&nbsp;<br /><br />Best regards,<br />Kaja</p><div style="clear:both;"></div>