Comparison of two class E amplifiers for EER transmitter

This paper compares two types of class E power amplifier and studies their applicability in an EER (envelope elimination and restoration) transmitter. In EER applications one of the main concerns is the modulation bandwidth of the supply voltage and DC bias current. It is shown here that a recently proposed parallel tuned class E dimensioning principle results in much wider modulation bandwidth due to lower bias inductance of the transistor, so that a given transistor can be used at higher frequency, or its response can be linearized by adding a parallel linear capacitance to the drain node. The findings are verified by behavioural simulation.