Abstract
This article shows the possibility in principle to design stripline comb filters with alternating signs of the coupling coefficients. The new feature of the stepped-impedance resonators of the quarterwave type was established. They provide the opposite sings of the electromagnetic coupling with adjacent resonators. Such resonators are asymmetric relative to the vertical axes, which is drawn through their middle part. The stripline passband filters with alternating signs of coupling coefficients have attenuation poles that are located to the left and to the right of the passband. Those poles improve the selectivity of such filters. The articles provide the measured characteristics of the stripline comb filter of the forth order with alternating coupling, which has the central frequency of f 0 = 1835 MHz and the passband width of 90 MHz. The filter is constructed using a dielectric material with relative permittivity of εr = 92 and has the dimensions of 7.4×4.2×2 mm.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
G. Matthaei, E. M. T. Jones, L. Young, Microwave Filters, Impedance-Matching Networks, and Coupling Structures (Artech House, 1980).
J.-S. Hong, Microstrip Filters for RF Microwave Application, 2nd ed. (Wiley, N.Y., 2011).
M. Makimoto, S. Yamashita, Microwave Resonators and Filters for Wireless Communication. Theory, Design and Application (Springer, 2001), DOI: 10.1007/978-3-662-04325-7.
T. Ishizaki, M. Fujita, H. Kagata, T. Uwano, H. Miyake, “A very small dielectric planar filter for portable telephones,” IEEE Trans. Microwave Theory Tech. 42, No. 11, 2017 (1994), DOI: 10.1109/22.330112.
L. K. Yeung, K. L. Wu, Y. E. Wang, “Low-temperature cofired ceramic LC filters for RF applications,” IEEE Microwave Magazine 9, No. 5, 118 (2008), DOI: 10.1109/MMM.2008.927634.
A. Fukasawa, “Analysis and composition of a new microwave filter configuration with inhomogeneous dielectric medium,” IEEE Trans. Microwave Theory Tech. 30, No. 9, 1367 (1982), DOI: 10.1109/TMTT.1982.1131262.
http://www.murata.com.
http://www.ctscorp.com.
L. N. Dworsky, “Stripline filters — An oveview,” Proc. of 37th Annual Symp. on Frequency Control, 1–3 Jul. 1983 (IEEE, 1983), pp. 387–393, DOI: 10.1109/FREQ.1983.200697.
A. V. Zakharov, M. Ye. Ilchenko, V. Ya. Karnauh, L. S. Pinchuk, “Stripline bandpass filters with step-impedance resonators,” Radioelectron. Commun. Syst. 54, No. 3, 163 (2011), DOI: 10.3103/S0735272711030071.
A. V. Zakharov, M. Ye. Ilchenko, L. S. Pinchuk, “Coupling coefficient of quarter-wave resonators as a function of parameters of comb stripline filters,” Radioelectron. Commun. Syst. 58, No. 6, 284 (2015), DOI: 10.3103/S0735272715060060.
A. V. Zakharov, M. E. Ilchenko, “Pseudocombline bandpass filters based on half-wave resonators manufactured from sections of balanced striplines,” J. Commun. Technol. Electron. 60, No. 7, 801 (2015), DOI: 10.1134/S1064226915060182.
A. V. Zakharov, “Stripline combline filters on substrates designed on high-permittivity ceramic materials,” J. Commun. Technol. Electron. 58, No. 3, 265 (2013), DOI: 10.1134/S1064226913030145.
A. V. Zakharov, M. E. Il’chenko, “Thin bandpass filters containing sections of symmetric strip transmission line,” J. Commun. Technol. Electron. 58, No. 7, 728 (2013), DOI: 10.1134/S1064226913060144.
A. V. Zakharov, M. E. Il’chenko, V. N. Korpach, “Features of the coupling coefficients of planar stepped-impedance resonators at higher resonance frequencies and application of such resonators for suppression of spurious passbands,” J. Commun. Technol. Electron. 59, No. 6, 550 (2014), DOI: 10.1134/ S1064226914060217.
A. V. Zakharov, M. Ye. Ilchenko, L. S. Pinchuk, “Coupling coefficients of step-impedance resonators in stripeline band-pass filters of array type,” Radioelectron. Commun. Syst. 57, No. 5, 217 (2014), DOI: 10.3103/S0735272714050045.
Gerhard Megla, Dezimeterwellentechnik. Theorie und Technik der Dezimeterschaltungen [in German] (Leipzig Fachbuchverl., 1955).
V. I. Wolman (ed.), Calculation and Design of Microwave Stripline Devices Reference [in Russian] (Radio i Svyaz’, Moscow, 1982).
A. L. Feldstein (ed.), Reference about Elements of Stripline Engineering [in Russian] (Svyaz’, Moscow, 1979).
G. Pfitzenmaier, “Synthesis and realization of narrow-band canonical microwave bandpass filters exhibiting linear phase and transmission zeros,” IEEE Trans. Microwave Theory Tech. 30, No. 9, 1300 (1982), DOI: 10.1109/TMTT.1982.1131252.
J.-S. Hong, M. J. Lancaster, “Design of highly selective microstrip bandpass filters with a single pair of attenuation poles at finite frequencies,” IEEE Trans. Microwave Theory Tech. 48, No. 7, 1098 (2000), DOI: 10.1109/22.848492.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © A.V. Zakharov, M.Ye. Ilchenko, O. Lysenko, L.S. Pinchuk, 2017, published in Izvestiya Vysshikh Uchebnykh Zavedenii, Radioelektronika, 2017, Vol. 60, No. 4, pp. 222–231.
ORCID: 0000-0002-1222-1623
ORCID: 0000-0002-5518-5992
ORCID: 0000-0002-7276-9279
ORCID: 0000-0002-1893-3365
About this article
Cite this article
Zakharov, A.V., Ilchenko, M.Y., Lysenko, O. et al. Stripline bandpass filters with alternating coupling coefficients. Radioelectron.Commun.Syst. 60, 173–180 (2017). https://doi.org/10.3103/S0735272717040033
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.3103/S0735272717040033