Question about Amplifier in ADS

Dear All,
I'm a new comer in this forum. Can someone give me information how to design a nonlinear amplifier in ADS. For instace I have such a question
U_out= a_1*U_in + a_3*U_in^3 +.......... ,
The coefficient a_1 and a_3, ... have been found by another tool.
How I can design this ampfier in ADS. Thanks in advance.

regard

I assume u mean a power amplifier........check these links:

http://www.apl.jhu.edu/Notes/Penn/pr...HPA_Report.pdf

http://www.home.agilent.com/agilent/...LENT_EDITORIAL

and just a pointer....just google it...u'll find n-number of tutorials for a power amplifier design using ADS

hope this helps...