Title :
Rectangularly driven class-A harmonic-control amplifier
Author :
Ingruber, Bernhard ; Baumgartner, Josef ; Smely, Dieter ; Wachutka, Martin ; Magerl, Gottfried ; Petz, Felix A.
Author_Institution :
Dept. of Electron. Design & Meas. Tech., Wien Univ., Austria
fDate :
11/1/1998 12:00:00 AM
Abstract :
A rectangularly driven class-A harmonic-control amplifier (rHCA) is studied, which combines the advantage of high device drain efficiency (ηD) of a switched-type amplifier with the advantage of high gain (G) of class-A operation, thus maximizing its power-added efficiency (PAE). In this rHCA, harmonics are controlled such that drain-to-source voltage becomes half-sinusoidal. This reduces the necessary supply voltage without degrading output power. In comparison with a class-F amplifier using the same transistor, the realization of such an rHCA has demonstrated 0.4-dB larger output power, 3.8-dB increased gain, 4% higher PAE, and 22% lower drain supply voltage at 1.62 GHz
Keywords :
UHF power amplifiers; harmonics; intermodulation distortion; switched networks; 1.62 GHz; class-A harmonic-control amplifier; high efficiency; power-added efficiency; rectangularly driven amplifier; supply voltage reduction; switched-type amplifier; FETs; High power amplifiers; Intermodulation distortion; Linearity; Microwave amplifiers; Operational amplifiers; Power amplifiers; Power generation; Space technology; Voltage control;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
