Dear all,
Another quick question.
What is the purpose of antenna LC network on reference design specifically? Does it meant for impedance matching or harmonic suppression?
We're suffering package lost on an custome nRF52840 design, maybe we could get some clue from antenna network pattern?
Thanks,
Ava
Hi Ava,
The components in the radio matching network are there to subdue harmonics and make sure that the signal in the transmission line is close to 50 ohms impedance. There isn't a guarantee that the signal out from the ANT pin is 50 ohms impedance, and the radio matching network is there to adjust it. The same goes for the antenna matching network, it's there to make sure that the signal sees as close as possible to a 50 ohm impedance into the antenna.
Having close to 50 ohm impedance for the entire RF path facilitates an optimal transfer of energy, and if there is a mismatch in impedance you can get a loss in power and reduced performance.
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Best regards,
Martin S.
