https://devzone.nordicsemi.com/f/nordic-q-a/15951/antenna-tunningHi , I have designed a beacon using nrf51422 nordic chip. But when I checked the antenna frequency , i came to know that its above 2.45 Ghz. I tried by the changing the capacitor value shunted to antenna but it didnt help much to bring the frequencyen-USTelligent Community 13Wed, 24 Aug 2016 08:04:45 GMThttps://devzone.nordicsemi.com/thread/60843?ContentTypeID=1Wed, 24 Aug 2016 08:04:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0cc6e258-b550-4695-874f-d6893ecffc26Einar Thorsrud<p>Are you using a PCB antenna? The <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.whitepapers/dita/whitepapers/pdflinks/nwp_008.html?cp=11_12"><em>λ/4 printed monopole antenna for 2.45 GHz</em></a> white paper describes how to design and tune a 2.4 GHz antenna. (The article is old, but the content is still valid.)</p><div style="clear:both;"></div>