A linearized 1 GHz class E amplifier

An envelope elimination and restoration amplifier is analyzed, built and tested at 1 GHz. The predicted amplifier performance closely matches the measured amplifier performance. It is determined that a few key circuit parameters largely control the amplifier intermodulation performance. It is found that time delay matching of the phase signal information and the envelope signal information is very important. It is also found that the zero voltage signal feed through of the class E amplifier is also a significant parameter. The cascaded connection of the modulator and the class E amplifier, with respect to the power flow from the supply to the RF signal output places high demands on the modulator and amplifier efficiency.