Coupling coefficient of quarter-wave resonators as a function of parameters of comb stripline filters

Alexander V. Zakharov; Mykhailo Ye. Ilchenko; Ludmila S. Pinchuk

doi:10.3103/S0735272715060060

Authors

Alexander V. Zakharov Igor Sikorsky Kyiv Polytechnic Institute, Ukraine https://orcid.org/0000-0002-1222-1623
Mykhailo Ye. Ilchenko Igor Sikorsky Kyiv Polytechnic Institute, Ukraine https://orcid.org/0000-0002-3459-4949
Ludmila S. Pinchuk Igor Sikorsky Kyiv Polytechnic Institute, Ukraine https://orcid.org/0000-0002-1893-3365

DOI:

https://doi.org/10.3103/S0735272715060060

Keywords:

coupling coefficient, resonance frequency, stripline, comb filter, frequency response

Abstract

The relationship of the coupling coefficient of quarter-wave resonators operating on the main resonance frequency f₀ as a function of different parameters of comb filters made of sections of symmetric striplines has been analyzed. It has been found out that the coupling coefficient increases with the rise of relative dielectric permittivity of striplines, their thickness and the resonance frequency. The measured characteristics of the stripline 4-resonator comb filter with central frequency f₀ = 2.4 GHz built on dielectric material with ε_r = 9.7 are also presented.

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