High-power time-domain measurement system with active harmonic load-pull for high-efficiency base-station amplifier design

Author

Benedikt, Johannes ; Gaddi, Roberto ; Tasker, Paul J. ; Goss, Martin

Author_Institution

Sch. of Eng., Cardiff Univ., UK

Volume

48

Issue

12

fYear

2000

fDate

12/1/2000 12:00:00 AM

Firstpage

2617

Lastpage

2624

Abstract

A measurement system combining vector corrected waveform measurements with active harmonic load-pull extends, for the first time, real-time experimental waveform engineering up to the 30-W power level. The vector correction procedure is presented in this paper. A novel harmonic load-pull approach based on the real-time measurement capability of the system is demonstrated on a 4-W LDMOS device. A 20% increase in maximum output power to 4.7 W without degrading gain and efficiency is realized. Waveform analysis at various drive and load conditions directly identifies nonlinear capacitance effects being a key design issue for the design of highly efficient power amplifier

Keywords

calibration; harmonic analysis; microwave measurement; microwave power amplifiers; mobile radio; power MOSFET; waveform analysis; 30 W; 30-W power level; 4 W; 4-W LDMOS; 4.7 W; active harmonic load-pull; base-station amplifier design; efficiency; gain; harmonic load-pull; high-power time-domain measurement; linear capacitance effects; mobile communication; power amplifier; real-time measurement; vector correction; waveform analysis; waveform measurement; Capacitance; Degradation; Power amplifiers; Power engineering and energy; Power generation; Power measurement; Power system harmonics; Real time systems; Time domain analysis; Time measurement;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.899021

Filename

899021