DocumentCode :
1515158
Title :
Asymmetric Coupled-Line Directional Couplers as Impedance Transformers in Balanced and 
-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
Link To Document :
