Novel transmission line combiner for highly efficient outphasing RF power amplifiers

Author

Gerhard, Walter ; Knoechel, Reinhard

Author_Institution

Christian-Albrechts-Univ. of Kiel, Kiel

fYear

2007

fDate

9-12 Oct. 2007

Firstpage

1433

Lastpage

1436

Abstract

A novel transmission line (TL) combiner is proposed having the same functionality as a Chireix-combiner with respect to its load impedance and combiner efficiency, but without the need of additional parallel compensating elements, which are necessary to improve the power backoff efficiency in highly efficient outphasing rf power amplifiers. Thus the design complexity is reduced and an alternative approach to Chireix-combiners becomes available. A detailed mathematical analysis of this TL- combiner is presented and design equations are derived. Its different physical operation and performance is demonstrated by a design example.

Keywords

power amplifiers; radiofrequency amplifiers; transmission lines; Chireix-combiner; highly efficient outphasing RF power amplifiers; load impedance; parallel compensating elements; power backoff efficiency; transmission line combiner; High power amplifiers; Impedance; Microwave amplifiers; Power transmission lines; Radio frequency; Radiofrequency amplifiers; Topology; Transmission line theory; Variable structure systems; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2007. European

Conference_Location

Munich

Print_ISBN

978-2-87487-001-9

Type

conf

DOI

10.1109/EUMC.2007.4405474

Filename

4405474