STM32WL55 output RFO_H output impedance

[user0022]

Hello,

I am using a STM32WL55 UFQFPN48 in an application. I am only using the high power output (up to +22 dBm) and only plan on transmitting with this device.

I want to transmit in the 420-440 MHz range, but there does not seem to be any load-pull analysis data from within AN5457 which would give output impedance at this frequency. I can only find data for higher bands. 

Is this data found somewhere else? I would like to use it for simulation and calculation.

Best

[Saverio GRUTTA · Accepted solution]

Hello,

I can provide the optimum load for 490 MHz at 22 dBm.

Zopt = 14+ j10

P_level (dBm) = 22 dBm 

Pout = 21.9 dBm

IBAT = 108.5 mA

Best regards

Saverio