Asymmetric Coupled-Line Directional Couplers as Impedance Transformers in Balanced and $n$ -Way Power Amplifiers

Author

Wincza, Krzysztof ; Gruszczynski, Slawomir

Author_Institution

Fac. of Electr. Eng. Automatics, Inf. Technol. & Electron., AGH Univ. of Sci. & Technol., Cracow, Poland

Volume

59

Issue

7

fYear

2011

fDate

7/1/2011 12:00:00 AM

Firstpage

1803

Lastpage

1810

Abstract

Asymmetric 3-dB coupled-line directional couplers for application in balanced circuits have been considered, and it has been theoretically shown that such couplers allow for simultaneous (equal) power division and impedance transformation. A limitation on achievable impedance ratio has been derived. The theoretical analysis has been experimentally verified by the measurements of a number of passive circuits and an exemplary application of the proposed circuits in a four-way power amplifier has been shown.

Keywords

directional couplers; impedance convertors; power amplifiers; asymmetric coupled-line directional couplers; balanced circuits; four-way power amplifiers; impedance ratio; impedance transformation; impedance transformers; power division; Capacitance; Couplings; Directional couplers; Frequency measurement; Impedance; Semiconductor device measurement; $n$-way power amplifiers; Asymmetric coupled lines; asymmetric directional couplers; balanced circuits; impedance transformers;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2011.2141677

Filename

5766067

Asymmetric Coupled-Line Directional Couplers as Impedance Transformers in Balanced and -Way Power Amplifiers

Wincza, Krzysztof ; Gruszczynski, Slawomir

jour

Asymmetric Coupled-Line Directional Couplers as Impedance Transformers in Balanced and $n$ -Way Power Amplifiers