Thank you for Azulykit.
Not just using HFSS.
First step ,I did circuit simulation in ADS.I made some matches in the input and output ports of LNA .
Second,I did full wave simulation in hfss. I simulated the pcb of the entire circuit except the LNA,the model has 4 lumped port , 2 for input and output ,other 2 for interface of LNA.
Third,export the s parameters into ADS.
When the simulation in HFSS is completed, export s parameters into ads
then cosimulate the s para of LNA and the s para obtained by hfss.
Last ,I compare the results in first and third step
My english is not good ,hope you understand.
Sherry