ADS design guide cell：fmax vs IC problem

[Yonion2801]

I am using ADS the design guide-amplifier-DC and bias point simulation-BJT_ft_fmax_vs Bias cell to simulate the Fmax variance with the sweep of IC. when I use the original schmatic with original ideal BJT, this cell works and I can get the results like below:

but when I change the BJT from the ideal one to the PDK, I can't get the full result(only get two) like below:

I check the error from the plot:Maximum frequency of oscillation (fmax) and other plot.
While evaluating "LcsGetNewExpName1":
Operation "[ ] sweep access", index out of range in dimension 1, independent "freq" must use an index in the range 0 <= index < 0
Can anyone knows what is going on and how to solve this?

thanks in advance!

 

[BigBoss]

I think the PDK model is valid for just a Small Signal. As you see, Nonlinear referenced simulations have not been done. Check the model and verify that the model covers nonlinearity.

 

[Yonion2801]

I think the PDK model is valid for just a Small Signal. As you see, Nonlinear referenced simulations have not been done. Check the model and verify that the model covers nonlinearity.

What should I do in this case to get the ft vs IC curve?

 

[BigBoss]

What should I do in this case to get the ft vs IC curve?

You should find the nonlinear model of the PDK.

 

[Yonion2801]

You should find the nonlinear model of the PDK.

How do I find nonlinear models in PDK?The PDK provides only one NPN model.For example the GF 0.13um 8xp