Power supply modulation for RF applications

Author

Brackle, A. ; Rathgeber, L. ; Siegert, F. ; Heck, S. ; Berroth, Manfred

Author_Institution

Inst. of Electr. & Opt. Commun. Eng., Univ. of Stuttgart, Stuttgart, Germany

fYear

2012

fDate

4-6 Sept. 2012

Abstract

Envelope tracking is a promising means to enhance radio frequency power amplifier efficiency for signals with non-constant envelope. The adaption of the power amplifier supply voltage is performed by a voltage modulator circuit, which is mainly based upon power electronics circuits, but requires bandwidths up to the MHz region. This paper introduces the benefits and challenges of envelope tracking and gives an overview of several voltage modulator architectures. Current measurement data of a class-G modulator is presented as well.

Keywords

modulators; power amplifiers; power supply circuits; radiocommunication; RF applications; class-G modulator; envelope tracking; nonconstant envelope; power amplifier supply voltage; power supply modulation; radio frequency power amplifier efficiency; voltage modulator architecture; voltage modulator circuit; Bandwidth; Modulation; Power amplifiers; Power generation; Radio frequency; Switches; Voltage measurement; Envelope tracking; RF power amplifier; high efficiency;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Motion Control Conference (EPE/PEMC), 2012 15th International

Conference_Location

Novi Sad

Print_ISBN

978-1-4673-1970-6

Electronic_ISBN

978-1-4673-1971-3

Type

conf

DOI

10.1109/EPEPEMC.2012.6397531

Filename

6397531