https://devzone.nordicsemi.com/f/nordic-q-a/19530/solder-mask-on-antennaThe example nRF51-DK gerbers have solder mask on the PCB antenna. But for the nRF24L01+ EK gerbers, the PCB antenna has the solder mask removed partially, along the length of the antenna. I&#39;ve seen some conflicting things online as to what is besten-USTelligent Community 13Tue, 07 Feb 2017 16:42:51 GMThttps://devzone.nordicsemi.com/thread/75906?ContentTypeID=1Tue, 07 Feb 2017 16:42:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2df850e5-5773-4f61-a9d1-e22c0162bae0Joe Wright<p>Thanks, that&#39;s a relief.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/75905?ContentTypeID=1Tue, 07 Feb 2017 14:05:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4378d419-c19f-4600-8393-b2d07694f333FormerMember<p>The solder mask is made of a plastic material. When RF signals pass through plastic, they are typically hardly not damped. I cannot see any reason not to use solder mask, since solder mask is a good way to protect the antenna.</p> <p>When tuning the antenna, it is not difficult to cut the antenna when there is solder mask on it. The &quot;harder&quot; part is the copper.</p><div style="clear:both;"></div>