Is there any documentation to design an antenna on the PCB that works at 433MHz over LoRa/LoRaWAN for stm32wl ?

[DavideMorgado]

PS: I don't want to use an external antenna

[Louis AUDOLY]

Hello,

There is not a documentation to describe how to design an antenna, but there is an application note that describe precautions to be taken to achieve the best RF performance of the STM32WL.

You can find this AN here :

https://www.st.com/resource/en/application_note/an5407-optimized-rf-board-layout-for-stm32wl-series-stmicroelectronics.pdf

If you want, I can suggest you to contact those antenna (external and internal) providers : Abracon, Johanson, LPRS, Nearson, WE.

Regards