Title :
The transmission-line high-efficiency class-E amplifier
Author :
Mader, Thomas B. ; Popovic, Zoya B.
Author_Institution :
Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA
fDate :
9/1/1995 12:00:00 AM
Abstract :
High-efficiency switched-mode (heavily saturated) circuits such as the class-E amplifier are well-known in the MHz frequency range. Here, a microwave transmission-line class-E amplifier is presented. Design equations for the output circuit line lengths and impedances are derived, along with approximate equations predicting power and efficiency for the class-E amplifier. Microstrip circuits using the Siemens CLY5 MESFET demonstrate 80% power-added efficiency (PAE) at 0.5 GHz with 0.55 W of output power and 73% PAE at 1.0 GHz with 0.94 W. Experimental results compare favorably to a simplified design-oriented analysis
Keywords :
UHF amplifiers; microstrip circuits; switching circuits; 0.5 to 1 GHz; 0.55 to 0.94 W; 73 to 80 percent; Siemens CLY5 MESFET; UHF; class-E amplifier; design equations; high-efficiency amplifier; microstrip circuits; microwave transmission-line; switched-mode circuits; Equations; Frequency; Impedance; MESFET circuits; Microstrip; Microwave amplifiers; Power amplifiers; Power generation; Switching circuits; Transmission lines;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
