Component value in nRF52833 QDAA matching network

[alien]

Hi:

My device is nRF52833-QDAA. And I'm totally a beginner in RF.

Right now I'm trying to figure out the component value of the matching network Z1 Z2 Z3 .

How can I do it ?

Thanks in advance!

[AHaug]

Hi,

We've assigned your case to one of our available hardware engineers who will go through your request shortly. However it may take some time. 

Apologies for the inconvenience.

Kind regards,
Andreas

[JONATHAN LL]

Hi Ali, 

ight now I'm trying to figure out the component value of the matching network Z1 Z2 Z3 .

I dont recommend spending much time trying to solver the "equation" as the theoretical result will likely not be ideal.  Best way to do this is to connect to the antenna with a VNA and start adjusting values. 


We have some info that you might find useful on this topic here: https://youtu.be/x1m8G8MAeUQ?t=3553 Lots of useful info, but added timestamp to relevant area. 


more info general:
https://devzone.nordicsemi.com/guides/hardware-design-test-and-measuring/b/nrf5x/posts/general-pcb-design-guidelines-for-nrf52-series 

Another video on the topic of tuning an antenna. 
https://youtu.be/rbXq0ZwjETo?t=443 

Regards,
Jonathan

[alien]

Hi Jonathan,

Thank you for replying. That's very helpful.

Since I need to do PCB manufacturing as soon as possible.

I would like to determine a value of components Z1 Z2 Z3 first(theoretically)

And then adjusting values.

So is there any advise for equation or I just put 0Ω resistor to replace Z1 Z2 Z3?

Best,

Alien