https://devzone.nordicsemi.com/f/nordic-q-a/19298/matching-network-for-nrf24l01-balun-pa-and-pcb-antSo I was thinking of having the following: nRF24L01+ to balun (e.g., Johanson 2450BM14A0002 or Anaren BD2425NnRF) to PA/LNA RFX2401C to PCB antenna If I&#39;m willing to manually trim the PCB antenna trace a bit at a time, do I need anyen-USTelligent Community 13Mon, 30 Jan 2017 12:07:45 GMThttps://devzone.nordicsemi.com/thread/74804?ContentTypeID=1Mon, 30 Jan 2017 12:07:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f5599f9b-2cf3-40b5-bfda-12e68f3daec7Joe Wright<p>Awesome, thanks</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/74803?ContentTypeID=1Mon, 30 Jan 2017 12:00:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1edceffd-c53f-4f93-949f-18f2fe2707d7FormerMember<p><strong>1)</strong> If tuning the antenna by cutting it&#39;s length, you will only need one component in the antenna tuning network, and that is shunt capacitor. The shunt capacitor will be placed as close to the antenna as possible, between 3 and 4.</p> <p><strong>2)</strong> The PA/LNA should be placed in the 50 Ohm reference point, between the balun and the shunt antenna tuning capacitor. The PA/LNA can be placed &quot;as close as possible&quot; to the balun. If there is a distance between the balun and the PA/LNA, the transmission line between the two should be a 50 Ohm transmission line. In that case, the width of the transmission line can be calculated using <a href="http://www.hp.woodshot.com/">appCAD</a> (co-planar waveguide).</p><div style="clear:both;"></div>