I am trying to confirm on a Smith chart the matching network for 169MHz frequency using an external PA and and 437Mhz with an external LNA.
I am not able to end at the origin of the Smith chart using the reference design provided.
The transmitting and receiving paths have different frequencies:
For 169MHz, I am trying to verify the conversion from 80 ohms to 50 ohms
For 437MHz, I am trying to verify the conversion from (50+j30) ohms to 50 ohms
In the figure outlined below, could you let me know which lumped elements are used for the matching and which ones are used for decoupling or serve other purposes.