Coupling coefficient of quarter-wave resonators as a function of parameters of comb stripline filters
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 εr = 9.7 are also presented.
MATTHAEI, G.L.; JONES, E.M.T.; YOUNG, L. Microwave Filters, Impedance-Matching Networks and Coupling Structures. Artech House, 1980.
BOLLJAHN, J.T.; MATTHAEI, G.L. A study of the phase and filter properties of arrays of parallel conductors between ground planes. Proc. IRE, 1962, v.50, n.3, p.299-311, DOI: http://dx.doi.org/10.1109/JRPROC.1962.288322.
HONG, J.-S. Microstrip Filters for RF/Microwave Application, 2nd ed. N.Y.: Wiley, 2011, 640 p.
FELDSHTEIN, A.L. (ed.), Handbook on Elements of the Microstrip Devices. Moscow: Svyaz’, 1979 [in Russian].
YEUNG, L.K.; WU, K.-L.; WANG, Y.E. Low-temperature cofired ceramic LC filters for RF applications. IEEE Microwave Magazine, Oct. 2008, v.9, n.5, p.118-128, DOI: http://dx.doi.org/10.1109/MMM.2008.927634.
ISHIZAKI, T.; FUJITA, M.; KAGATA, H.; UWANO, T.; MIYAKE, HIDEYUKI. A very small dielectric planar filter for portable telephones. IEEE Trans. Microwave Theory Tech., Nov. 1994, v.42, n.11, p.2017-2022, DOI: http://dx.doi.org/10.1109/22.330112.
ZAKHAROV, A.V.; ILCHENKO, M.Y. Thin bandpass filters containing sections of symmetric strip transmission line. J. Commun. Technol. Electronics, 2013, v.58, n.7, p.728-736, DOI: http://dx.doi.org/10.1134/S1064226913060144.
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