STM32WLE5CCU6 – RF Output Impedance at 923 MHz, +22 dBm (UFQFPN48)

[vutranquoc]

Hello ST Community,

I am designing an RF matching network for the STM32WLE5CCU6 (UFQFPN48) at 923 MHz, +22 dBm.

In AN5457, I found PA output impedance data for 915 MHz (+22 dBm, UFQFPN48), but not for 923 MHz.

I would like to ask:

1. What is the recommended optimal PA load impedance at 923 MHz, +22 dBm for UFQFPN48?

2. Can I use the 915 MHz impedance values for designing the 923 MHz matching network?

3. Does ST provide reference matching component values for this configuration?

Thank you for your support!

[Imen.D]

Hello ​@vutranquoc ,

Let me first welcome you to the ST Community.

Are you using an RF switch to separate the TX and RX paths, or are they working in a direct-tie configuration?