Title :
Class-E high efficiency power amplifiers
Author :
Tan, Q.-S. ; Ciott, C. ; Schmitt, H.J.
Author_Institution :
Ghent Univ., Belgium
Abstract :
Three switching mode power amplifiers are realized with collector (drain) efficiencies of 87%, 86% and 92% at 430 MHz/5 W, 100 MHz/12 W, and 5 MHz/62 W, respectively. These high efficiencies are achieved by the class-E technique and low insertion-loss load networks. Detailed design rules and major parameters are presented. Because the output power is limited by collector-emitter breakdown voltage and collector current, not the rated power output from the databook, a 5-W output using a 4-W rated power transistor without special heat-sink is achieved
Keywords :
high-frequency amplifiers; power amplifiers; radiofrequency amplifiers; 5 W; 86 to 92 percent; HF type; RF type; class-E; collector current; collector-emitter breakdown voltage; design rules; high efficiency; low insertion-loss load networks; power amplifiers; switching mode; Breakdown voltage; Capacitance; Circuits; High power amplifiers; Impedance; Light sources; Power amplifiers; Radio frequency; Radiofrequency amplifiers; Switches;
Conference_Titel :
Circuits and Systems, 1992., Proceedings of the 35th Midwest Symposium on
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-0510-8
DOI :
10.1109/MWSCAS.1992.271319
