nRF7002 + nRF52840

RE: nRF7002 + nRF52840

JONATHAN LL — Thu, 12 Dec 2024 09:50:43 GMT

[quote user="Natalia_NPL"]What values should I assign to capacitors Z1, Z2 y Z3?[/quote]

There is no way of knowing exactly wat values you should have there before testing the antenna an looking at it with a VNA, but it is possible to guess some ok values. Best thing here is often to start with the antenna manufacurers recomended values.

You are using a Johanson 2450AT18D0100E, so you can also ask them for som help here. But you can start with only a series 0 Ohm resistor before tuning, or ask them if they have any recommended values.

https://www.johansontechnology.com/docs/1525/2450AT18D0100E-AEC_tQ46Bzf.pdf

Regards,
Jonathan

RE: nRF7002 + nRF52840

Natalia_NPL — Wed, 11 Dec 2024 11:39:47 GMT

Thank you for your response, Jonathan.

I still have a question. In my case, I would need to make the following adjustment:

What values should I assign to capacitors Z1, Z2 y Z3?

Thanks in advance for any guidance!

RE: nRF7002 + nRF52840

JONATHAN LL — Fri, 06 Dec 2024 00:14:43 GMT

We do have a 7002DK that used the nRF5340, https://docs.nordicsemi.com/bundle/ug_nrf7002_dk/page/UG/nrf7002_DK/intro.html It will be similar and the use of the 7002EK and the 52840DK is also supported.

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/app_dev/device_guides/nrf70/nrf7002ek_dev_guide.html

https://docs.nordicsemi.com/bundle/ps_nrf7002/page/chapters/functional/doc/coexistence.html
Since you are using BLE and WIFI you will need most pins mentioned here, but SW_CTRL0 is optional when not using shared antenna.

Terrible drawing but you should add a matching network for the BLE antenna

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

Regards,
Jonathan