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Application of RH and LH sections for reduction of coupling coefficients in two-section asymmetric directional couplers

Published online by Cambridge University Press:  23 March 2015

Jakub Sorocki ,
Kamil Staszek ,
Ilona Piekarz ,
Krzysztof Wincza  and
Slawomir Gruszczynski
Jakub Sorocki
Affiliation:
AGH University of Science and Technology, 30 059 Cracow, Poland
Kamil Staszek
Affiliation:
AGH University of Science and Technology, 30 059 Cracow, Poland
Ilona Piekarz
Affiliation:
AGH University of Science and Technology, 30 059 Cracow, Poland
Krzysztof Wincza
Affiliation:
AGH University of Science and Technology, 30 059 Cracow, Poland
Slawomir Gruszczynski*
Affiliation:
AGH University of Science and Technology, 30 059 Cracow, Poland
*
Corresponding author: S. Gruszczynski Email: [email protected]
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Abstract

A method allowing for reduction of coupling coefficients required for realization of two-section asymmetrical coupled-line directional couplers has been proposed. It has been shown that by connecting uncoupled left-handed and right-handed transmission lines between two coupled-line sections one can obtain greater design flexibility of the resulting circuit, simultaneously with the coupling reduction in coupled-line sections. Moreover, the proposed circuit features the properties of two-section asymmetric directional couplers offering wide operational bandwidth. The theoretical analysis has been verified by measurements of a 3 dB directional coupler operating at the center frequency f0 = 1.5 GHz having coupling imbalance δC = ±0.4 dB and bandwidth 0.75–2.3 GHz.

Keywords

Passive components and circuitsCircuit design and applications
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 3: Journee Nationale des Micro-ondes (JNM) 2015 , May 2016 , pp. 559 - 565
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

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References

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