am-pm conversion characterization

I need a solid explanation of what AM/AM and AM/PM distortion is in RF power amplifiers.

I certainly understand that RF signals that do NOT have a constant envelope will generate in band distortion. What I do not understand is
how you get from the distortion term to a quantifyable expression
of AM/AM distortion. How is this even quantified.

How is AM/PM quantified .... in degrees I assume, but how is the result
computed ?

If anyone can point me to a paper that explains this, I would be most
oblidged.

Please email me at aschwarzinger@d2d.com.

Andy

yes, degrees.

computed ? Measured !

Here you are :

A Fast AM/AM and AM/PM Characterization Technique, GAAS 2003, Munich

Try this paper:

A comprehensive analysis of IMD behavior in RF CMOS power amplifiers
Fager, C.; Pedro, J.C.; de Carvalho, N.B.; Zirath, H.; Fortes, F.; Rosario, M.J.;
Solid-State Circuits, IEEE Journal of , Volume: 39 , Issue: 1 , Jan. 2004
Pages:24 - 34

Books:

Distortion in Power Amplifiers Artech House 2003
Intermodulation Distortion in Microwave Circuits Artech House 2003