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A quesion about class E PA

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totowo

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In Raab's classical paper 'idealized operation of the class E tuned power amplifier', a conclusion is that the normalized Pmax=0.0981 (Pmax @ClassA= 0.125). That means the PUF=Prf/Plin < 1

While in Steve Cripps's book <RF Power Amplifier for Wireless Communications>, the PUF of class E is -4sin(beta)/(1-sin(beta)), where beta is in fourth quadrant, so that the PUF can be larger than 1.

Is there anyone can explain the difference for me?
 

aryajur

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What is PUF? Also are you referring Pmax as the normalised power output capacity of the PA?
 

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