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STM32WBA antenna matching

dryet
Associate II

Hello,

I am working on a new design using the STM32WBA52CGU6. Is it possible for me to use the MLPF-WB55-01E3 to match the antenna impedance? Or what is the output impedance of this MCU?

Thank you in advance.

1 ACCEPTED SOLUTION

Accepted Solutions
dryet
Associate II

UPDATE:

For anyone interested I got an answer from ST. 

My MCU (STM32WBA52) has the output matched to 50 ohms. So there is only one matching network needed to get the antenna from it's off value to 50 ohms and then it can be directly fed to the RF pin.

STM32WB MCUs are NOT matched to 50 ohms so they need the MLPF chips to be correctly matched for your 50 trace.

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1 REPLY 1
dryet
Associate II

UPDATE:

For anyone interested I got an answer from ST. 

My MCU (STM32WBA52) has the output matched to 50 ohms. So there is only one matching network needed to get the antenna from it's off value to 50 ohms and then it can be directly fed to the RF pin.

STM32WB MCUs are NOT matched to 50 ohms so they need the MLPF chips to be correctly matched for your 50 trace.