vfone,
I have read a number of articles and pls verify my explanation is correct.
Basically, the gain expansion occur before the PA compresses. And the reason for Gain Expansion is because of the gain rises faster and expand before it compress. If the gain rises slow and steady than the expansion will not happened.
Other thing is, I have matched the PA for Max power, meaning the output load is correct and achieved max power , then where does this gain expansion came from?
Brgds
Manimaran