Title :
A linearized 1 GHz class E amplifier
Author :
Funk, G.D. ; Johnston, R.H.
Author_Institution :
NORTEL, Calgary, Alta., Canada
Abstract :
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
Keywords :
UHF amplifiers; delays; frequency response; intermodulation distortion; modulators; synchronisation; 1 GHz; IMD; cascaded connection; envelope elimination/restoration amplifier; envelope signal information; intermodulation performance; linearized class E amplifier; modulator connection; phase signal information; time delay matching; zero voltage signal feed; Circuits; High power amplifiers; Linearity; Phase modulation; Pulse amplifiers; Pulse width modulation; RF signals; Radiofrequency amplifiers; Signal restoration; Voltage;
Conference_Titel :
Circuits and Systems, 1996., IEEE 39th Midwest symposium on
Conference_Location :
Ames, IA
Print_ISBN :
0-7803-3636-4
DOI :
10.1109/MWSCAS.1996.593185
