https://devzone.nordicsemi.com/f/nordic-q-a/14395/reducing-the-antenna-range-to-50-cmHi, We are working on a smart lock project with nrf51822 third party module with an antenna on pcb. We are trying to cover 50 cm range at -20 dbm. But even at -30 dbm we are still around 1 meter. Is there any reference antenna design for thaten-USTelligent Community 13Thu, 09 Jun 2016 10:55:28 GMThttps://devzone.nordicsemi.com/thread/54963?ContentTypeID=1Thu, 09 Jun 2016 10:55:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7996721c-bc30-499b-9685-01cfd9e8a4b4erselg<p>Thank you very much, we will try it.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/54962?ContentTypeID=1Thu, 09 Jun 2016 10:29:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:17b44b8c-91c6-4162-a6ce-8406ffa43d34RichieJH<p>Cut the trace right before the antenna on your third party module and then see what happens. It is likely to still transmit something, might be what you are after.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/54964?ContentTypeID=1Thu, 09 Jun 2016 09:56:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:68a5dedc-4f2a-4f85-ac68-1e81cab29a27awneil<p>Yes, it <em>is</em> a duplicate question: <a href="https://devzone.nordicsemi.com/question/81478/what-is-the-lowest-transmit-range-i-can-achieve-with-nrf51822/">devzone.nordicsemi.com/.../</a></p><div style="clear:both;"></div>