Maximizing operating frequency bandwidth of microstrip-slot transition

Fedor Dubrovka; Kostiantyn Tkachenko; Eugene Saratov

doi:10.3103/S0735272722080027

Authors

Fedor Dubrovka National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine https://orcid.org/0000-0002-3485-6822
Kostiantyn Tkachenko National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine https://orcid.org/0009-0001-9236-4682
Eugene Saratov National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine https://orcid.org/0009-0004-4254-2091

DOI:

https://doi.org/10.3103/S0735272722080027

Keywords:

microstrip line, microstrip-slot transition, slot-line transition, equivalent circuit, voltage standing wave ratio, stub, wave impedance, short slot, open microstrip

Abstract

The paper presents the results of a theoretical study of the influence of wave impedances of a shorted slot and open microstrip quarter-wave stubs on the broadband response of the transition between perpendicularly located microstrip and slot transmission lines. A formula for the transfer coefficient of such transition has been obtained that considers the electromagnetic coupling coefficient between the microstrip and slot transmission lines. It has been shown that a decrease in the coupling coefficient narrows the frequency band for a given transfer coefficient. Based on the studies performed, recommendations are provided for selecting optimal wave impedances of stubs that ensure the maximization of the operating frequency band of microstrip-slot transition.

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