I wanted to understand the characteristics of the baluns included in the AX5043 datasheet. So, I did a bit of research with QUCS (Quite Universal Circuit Simulator). If I properly created the simulations for the AX5043 reference baluns in the AX5043 datasheet, the results are helpful.
These simulations provide information on which frequencies can be used with each reference design.
Frequency Band 868/915 MHz:
Frequency Band 470 MHz:
Frequency Band 433 MHz:
Frequency Band 169 MHz: