Title :
A planar 4.5-GHz DC-DC power converter
Author :
Djukic, Slobodan ; Maksimovic, Dragan ; Popovic, Zoya
Author_Institution :
Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO
fDate :
8/1/1999 12:00:00 AM
Abstract :
In this paper, we present two DC-DC converters that operate at a microwave frequency. The first converter consists of a class-E switched-mode microwave amplifier, which performs the DC-AC conversion, and two half-wave diode rectifier outputs. The class-E MESFET amplifier has a minimum power-added efficiency of 86%, corresponding drain efficiency of 95%, and 120 mW of output power at 4.5 GHz. The diode rectifier has a maximum conversion efficiency of 98% and an overall efficiency of 83%. The second converter consists of a high-efficiency class-E oscillator and a diode rectifier. The class-E oscillator has a maximum efficiency of 57% and maximum output power of 725 mW. The DC-DC converter is planar and compact, with no magnetic components, and with a maximum overall DC-DC conversion efficiency of 64% for a DC input of 3 V, and the output voltage across a 87-Ω load of 2.15 V
Keywords :
DC-DC power convertors; hybrid integrated circuits; microwave amplifiers; microwave integrated circuits; microwave oscillators; power integrated circuits; 120 mW; 2.15 V; 3 V; 4.5 GHz; 57 to 98 percent; 725 mW; DC-AC conversion; class-E MESFET amplifier; class-E oscillator; class-E switched-mode microwave amplifier; half-wave diode rectifier outputs; microwave frequency; planar DC-DC power converter; DC-DC power converters; Diodes; MESFETs; Microwave amplifiers; Microwave frequencies; Oscillators; Power amplifiers; Power generation; Rectifiers; Switching converters;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
