What is the input impedance of nrf52840 in different modes

[sasi]

Hello,

Can you please provide the input impedance or the S-parameter file of the impedance for the nrf52840 for receive mode, and also at tx power levels of -40dBm, 0dBm, and 5dBm?

We request this data the Ant port of the module, before the recommended matching/filter components provided in the reference design.

Thanks Sasidhar

[Joakim Jakobsen]

Hi Sasi!

Sorry for the late response!

We don't provide data for this yet, because we haven't measured it yet.
This should however be available in the specification at a later point in time.

Best regards.
Joakim.

[dom]

Joakim,

Any updates on this now that the nRF52840 is released? I've noticed several different forum users are interested in this data, myself included. 

Thanks,

Dom

[jjvicentenavarrete]

Hi, I also need the output impedance of the ANT port in order to get my matching network calculated.

Sometimes, the design has to be slightly different from the reference design, and having no output impedance data makes it impossible to get the maximum output power and thus not the best solution.

Please, this info is important if it isn´t 50 Ohm (which I assume it isn´t).

Best Regards,

Juanjo

[Joakim Jakobsen]

Hi.

Please take a look at the documents in the attached folder. You should be able to find the information you need there.

nRF52840 QIAA matching network.rar

Best regards,
Joakim