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

作者：Wincza Krzysztof^*; Gruszczynski Slawomir

来源：IEEE Transactions on Microwave Theory and Techniques, 2011, 59(7): 1803-1810.

DOI：10.1109/TMTT.2011.2141677

• Asymmetric coupled lines
• asymmetric directional couplers
• balanced circuits
• impedance transformers
• n-way power amplifiers

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.

• 出版日期2011-7