A new quasi-lumped suspended-substrate stripline structure admitting implementation of miniature highly selective narrowband filters is studied. Appreciable improvement of the device selectivity is achieved with supplementary strip conductors introduced between the resonators, which induce attenuation poles near both passband edges. Furthermore, these supplementary conductors reducing the coupling between the resona-tors allow diminishing the inter-resonator spacing and the total size. A four-resonator filter is synthesized using the intelligence optimization method. Experimental results of the manufactured filter are presented.
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doi:10.1109/TMTT.2005.855139
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8. Belyaev, B. A. and V. V. Tyurnev, "The method for microstrip filters parametric synthesis," 16th Int. Crimean Conf. "Microwave & Telecommunication Technology", (CriMiCo02006), Vol. 2, 517-519, Sevastopol, Ukraine, 2006.
doi:10.1109/CRMICO.2006.256088
9. Dovbysh, I. A. and V. V. Tyurnev, "Peculiarities of intelligence optimization of a microstrip filter on folded dual-mode resonators," PIERS Proceedings, 1161-1163, Moscow, Russia, Aug. 18-21, 2009.
10. Dovbysh, I. A. and V. V. Tyurnev, "Intelligence method for optimizing a microstrip filter based on folded dual-mode resonators," J. of Communications Technology and Electronics, Vol. 54, No. 11, 1269-1273, 2009.
doi:10.1134/S1064226909110059
11. Dovbysh, I. A. and V. V. Tyurnev, "Synthesis and investigation of three-section microstrip filter on folded dual-mode stepped-impedance resonators," Progress In Electromagnetics Research M, Vol. 12, 17-28, 2010.
doi:10.2528/PIERM10012507
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13. Belyaev, B. A., S. V. Butakov, N. V. Laletin, A. A. Leksikov, and V. V. Tyurnev, "Expert system Filtex32 for computer-aided design of bandpass microstrip filters," 15th Int. Crimean Conf. "icrowave & Telecommunication Technology", (CriMiCo02005), Vol. 2, 504-505, Sevastopol, Ukraine, 2005.
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