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Broadband coupled-line directional couplers with high impedance transformation ratio

Published online by Cambridge University Press:  10 February 2017

Krzysztof Wincza  and
Slawomir Gruszczynski
Krzysztof Wincza
Affiliation:
AGH University of Science and Technology, Cracow 30-059, Poland. Phone: +48-12 617-30-21
Slawomir Gruszczynski*
Affiliation:
AGH University of Science and Technology, Cracow 30-059, Poland. Phone: +48-12 617-30-21
*
Corresponding author: S. Gruszczynski Email: slawomir.gruszczynski@agh.edu.pl
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Abstract

A new class of 3-dB impedance transforming directional couplers has been proposed in which the recently published coupled-line couplers, consisting of coupled-line sections having different electrical lengths, have been utilized. The main advantage of the proposed directional couplers is the possibility of obtaining high impedance transformation ratio, thus the known limiting condition of realizable impedance transformation in 3-dB couplers is overcome. Moreover, the proposed directional couplers feature significantly wider operational bandwidths. The theoretical analysis of the proposed impedance-transforming directional couplers has been shown and is fully supported by the measurements of the manufactured model operating in 0.5–1.5 GHz frequency range.

Keywords

Passive components and circuitsCircuit design and applicationsDirectional couplers
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Special Issue 7: EuCAP 2016 special issue , September 2017 , pp. 1473 - 1480
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

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