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Information × Registration Number 0222U001481, 0119U100622 , R & D reports Title Creation of the theory and circuit solutions of non-minimal-phase planar filters with mixed couplings for telecommunications popup.stage_title Head Zakharov Olexander V., Доктор технічних наук Registration Date 27-01-2022 Organization National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" popup.description2 The theory of planar non-minimal-phase filters of the third and fourth order for means of telecommunications with various frequency characteristics is created. Techniques for constructing these filters have been developed, which do not use low-frequency prototypes, but allow direct calculation of circuit elements. New designs of planar band-pass filters (BPF) with cross-links, which are characterized by a wide variety of implemented frequency characteristics, are proposed and analyzed. Along with increased one-sided selectivity, they may have a symmetric frequency response with a attenuation pole located to the right and left of the bandwidth. The basis of the filters are pairs of closely spaced step-impedance resonators (SIR), the electromagnetic connection between which is mixed, both capacitive and inductive. Experimental samples of new planar non-minimal-phase filters of the third and fourth order for telecommunications are obtained, and the results of their experimental research, which confirm the theoretical provisions of the theory. The peculiarities of the combined electromagnetic interaction between the resonators of planar structures, which are used to create new non-minimal-phase filters of the third and fourth order with improved characteristics, are established. It is established that mixed coupling coefficients between SIR and simultaneous use of substrates with high dielectric constant allow to realize quasi-elliptical small-sized strip BPF with high selectivity. The inverse problem is solved for third- and fourth-order filters with mixed cross-linking. It allows for a given location of transmission zeros and known basic coupling coefficients to determine a mixed cross-link containing magnetic and electrical components. The method of the inverse problem shows that the third-order filters have ten different options for placing two zeros of transmission on the complex plane, and the fourth-order filters of eight such options. Product Description popup.authors Ivanova Tetiana L. Zakharov Olexander V. Litvintsev Sergii М. Pinchuk Liudmyla S. Rozenko Sergii О. popup.nrat_date 2022-03-09 Close