https://devzone.nordicsemi.com/f/nordic-q-a/100383/how-to-accurately-calculate-the-output-pin-impedance-to-accurately-develop-a-matching-circuitI am currently developing an RF system whereby I want to use the nRF24L01 transceiver, although I&#39;m quite new to RF design and the various intricacies that come with it. I am aware most circuits tend to match towards 50 ohms, what a smiths chart and theen-USTelligent Community 13Fri, 02 Jun 2023 11:43:54 GMThttps://devzone.nordicsemi.com/thread/428988?ContentTypeID=1Fri, 02 Jun 2023 11:43:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a717797b-cbfe-4963-93c1-472ead5f7739ketiljo<p>The nRF24L01 matching network have 4 main functions, which dictates the topology:&nbsp;</p> <p>1. Balun, transform from the differential ANT interface to a single ended antenna interface. This is done by creating a phase shift across the shunt inductor between ANT1 and ANT2. There are additional parasitic elements on-chip, like bonding wires, capacitors, etc.&nbsp;</p> <p>2. Impedance transformation from the impedance the PA want to &quot;see&quot; into the matching network to a 50 ohm interface for the antenna</p> <p>3. Harmonic filtering by acting as a low pass filter, with series L and shunt C</p> <p>4. Provide a DC path from the VDD_PA pin to both ANT pins to power the PA via the inductors between the ANT pins and VDD_PA.&nbsp;</p> <p>The component values are chosen to give best performance in terms of good output power and low harmonics. RX LO rejection is also part if this..&nbsp;</p> <p></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/428972?ContentTypeID=1Fri, 02 Jun 2023 10:53:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c1bcda84-4a66-4e43-9b36-d44d0212ff2bketiljo[deleted]<div style="clear:both;"></div>