High-efficiency harmonic-control amplifier

Author

Ingruber, Bernhard ; Pritzl, Werner ; Smely, Dieter ; Wachutka, Martin ; Magerl, Gottfried

Author_Institution

Dept. of Commun. & Radio Frequency Eng., Vienna Univ. of Technol., Austria

Volume

46

Issue

6

fYear

1998

fDate

6/1/1998 12:00:00 AM

Firstpage

857

Lastpage

862

Abstract

A half-sinusoidally driven class-A harmonic-control amplifier (hHCA) combines the advantage of high gain of class A with the advantage of high drain efficiency of class F. Consequently, power-added efficiency is increased as compared with state-of-the-art high-efficiency amplification techniques. As this innovative amplifier concept consists of a pulse-forming class-B amplifier stage followed by a class-A power-amplifier stage, intermodulation distortion is low even in saturation. The realization of such a two-stage hHCA offers 71% overall efficiency, 27.9 dBm output power, and 22.4 dB gain at 1.62 GHz. Two-tone measurements at 1 dB gain compression, where the amplifier´s single-carrier (SC) overall efficiency is still 64%, has demonstrated thirdand fifth-order intermodulation distortion of -29 and -21 dBc, respectively

Keywords

UHF integrated circuits; UHF power amplifiers; harmonics; hybrid integrated circuits; intermodulation distortion; 1.62 GHz; 22.4 dB; 64 to 71 percent; class F; class-A power-amplifier stage; fifth-order IMD; harmonic-control amplifier; high-efficiency amplifier; intermodulation distortion; pulse-forming class-B amplifier stage; third-order IMD; High power amplifiers; Intermodulation distortion; Microwave amplifiers; Microwave devices; Operational amplifiers; Power amplifiers; Power generation; Power system harmonics; Pulse amplifiers; Voltage;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.681213

Filename

681213