Dynamic load modulation of high power amplifiers with varactor-based matching networks

Author

Tehrani, Ali Soltani ; Nemati, Hossein Mashad ; Cao, Haiying ; Eriksson, Thomas ; Fager, Christian

Author_Institution

GigaHertz Centre, Chalmers Univ. of Technol., Goteborg, Sweden

fYear

2009

fDate

7-12 June 2009

Firstpage

1537

Lastpage

1540

Abstract

In this paper, the results of dynamic load modulation on a high power amplifier is shown with experiments. A simple static nonlinear model is used as an inverse model, and by dynamically controlling both the input signal to the power amplifier and the load impedance, high efficiency operation of the power amplifier is achieved. The modulated measurements show the feasibility of dynamic load modulation for practical high power, high frequency applications.

Keywords

impedance matching; modulation; power amplifiers; varactors; dynamic load modulation; dynamical control; high power amplifier; load impedance matching network; static nonlinear model; varactor; Baseband; High power amplifiers; Impedance measurement; Inverse problems; Power amplifiers; Power measurement; RF signals; Radiofrequency amplifiers; Signal design; Transmitters; Efficiency; load modulation network; power amplifiers; tunable-matching networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International

Conference_Location

Boston, MA

ISSN

0149-645X

Print_ISBN

978-1-4244-2803-8

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2009.5166002

Filename

5166002