topic PN5180 Antenna tuning in NFC

PN5180 Antenna tuning

s04 — Tue, 08 Mar 2022 03:13:40 GMT

Hello,

I'm trying to tune the matching circuit of the PN5180.
EMVCo L1 reception test is failing and needs to be resolved.
In the received waveform, the balance between Ich and Qch seems to be unbalanced in the long-distance test.
How can I tune the matching circuit (impedance) to control this IQ balance?
(Currently it matches 20Ω, the RxGain is MAX.)

s04_1-1646708769545.png

s04_0-1646708131602.png

Re: PN5180 Antenna tuning

fangfang — Mon, 14 Mar 2022 02:03:04 GMT

Hello @s04 .

For the application please kindly refer to the document as the attachment.

Hope it help you.

Have a nice day.

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Re: PN5180 Antenna tuning

s04 — Thu, 17 Mar 2022 08:30:19 GMT

Thank you !

You mean "Your weakness is not the IQ balance. It may be spike noise." , right?