Help with Matching circuit
@JakobJ From the datasheet it looks like the S22 parameter for 1090 mHz is about -8.2 dB at -177 degrees. Also, there are really an infinite number of combinations of values of components that will theoretically work in such a matching network, the same as there are an infinite number of components for an LC filter that will give you the same cutoff.  Just because you come up with a different value graphically matching on the Smith chart doesn't necessarily mean that your solution is "wrong" or that the datasheet circuit is "right."