BALF-NRF01D3 and nrf51822 QFAA , no 0.8pF on SEhttps://devzone.nordicsemi.com/f/nordic-q-a/5034/balf-nrf01d3-and-nrf51822-qfaa-no-0-8pf-on-seHi, I am currently implementing the BALF-NRF01D3 and I read in the docs that no 0.8pF capacitor is needed on the output (SE). Does this mean that no antenna matching is required? I guess this is still needed, but I just wanted to double check. en-USTelligent Community 13Thu, 15 Jan 2015 10:16:49 GMTRE: BALF-NRF01D3 and nrf51822 QFAA , no 0.8pF on SEhttps://devzone.nordicsemi.com/thread/17753?ContentTypeID=1Thu, 15 Jan 2015 10:16:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b92ee294-0ca5-4137-ac03-e22978f59da1FormerMember<p>Yes, <a href="http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00109732.pdf">ST&#39;s datasheet for the BALF-NRF01D3</a> shows that the 0.8 pF capacitor is no longer needed.</p> <p>Yes, an antenna matching network is still required. The purpose of the balun is to match the nRF51 chip to 50 Ohm. An antenna matching network matches the antenna to 50 Ohm.</p> <p>For a PCB antenna, the antenna matching network consists of one shunt component, see the <a href="https://www.nordicsemi.com/eng/nordic/download_resource/20347/4/40141452">antenna tuning</a> whitepaper, chapter 4.1.</p> <p>The values of the component(s) in the antenna matching network cannot be calculated. They have to be found during tuning of the antenna, using a network analyzer.</p><div style="clear:both;"></div>