I am trying to optimise the input match for this device when used with a third party Quadrature splitter operatinng from 100-900MHz
The data sheet has a plot of the input match with and without the 66.5Ohm shunt resistor used to match to the internal 250ohm shunt resistor.
the supplied S paramters for this device don't match the data sheet see below.
The question is is the Datasheet wrong or are the supplied S parameters wrong or am i doing something wrong with my simulation?
Figure 28 includes the evaluation board trace. That's probably why there's a resonance at 1800 MHz.
I think the s-param data on the web has the evaluation board traces de-embedded.