Title :
High-efficiency load-pull harmonic controlled Class-E power amplifier
Author :
Ortega-González, Francisco Javier ; Jimenez-martin, Jose Luis ; Asensio-López, Alberto ; Torregrosa-Penalva, Germán
Author_Institution :
E.U.I.T. Telecommun., Madrid, Spain
fDate :
10/1/1998 12:00:00 AM
Abstract :
This paper proposes a method to design high-efficiency Class-E power amplifiers following a frequency-domain approach instead of the classical time-domain analysis. Included are equations and plots of universal constant power and efficiency contours of Class-E amplifiers. To validate this method, a 900-MHz Class-E amplifier using a bipolar transistor has been designed and constructed. Power-added efficiency up to 79% and collector efficiency up to 91% have been measured at 900 MHz. Multiharmonic load-pull approach to the design of Class-E amplifiers proves that Class-E operation is possible at microwave frequencies using bipolar technology
Keywords :
UHF power amplifiers; bipolar transistor circuits; frequency-domain analysis; 79 percent; 900 MHz; 91 percent; Class-E power amplifier; UHF band; bipolar transistor; collector efficiency; design; frequency-domain analysis; load-pull harmonic control; power-added efficiency; Bipolar transistors; Design methodology; Equations; Frequency domain analysis; High power amplifiers; Microwave amplifiers; Operational amplifiers; Power amplifiers; Power system harmonics; Time domain analysis;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
