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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pichugin K. N., Sadreev A. F.
Заглавие : Analysis of a channel-drop filter based on dispersive waveguides and two resonant cavities
Место публикации : J. Opt.: IOP Publishing Ltd, 2013. - Vol. 15, Is. 3. - Ст.35502. - P. - ISSN 2040-8978, DOI 10.1088/2040-8978/15/3/035502
Примечания : Cited References: 35. - The work is partially supported by RFBR grant 13-07-98018-a and RFBR grant 'Sibir' 13-07-00497
Предметные рубрики: PHOTONIC CRYSTAL SLABS
REFLECTION FEEDBACK
MODES
DESIGN
Ключевые слова (''Своб.индексиров.''): channel dropping--dispersive waveguides--optical micro-cavities
Аннотация: By use of coupled-mode theory we analyze a channel add-drop filter based on two dispersive waveguides symmetrically coupled with two resonant optical cavities. We show new solutions for the channel-drop filter processes compared to the solutions found by Manolatou et al (1999 IEEE J. Quantum Electron. 35 1322). For a special choice of the dispersion of the waveguides, we reveal a frequency region with sufficient total reflection.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Serzhantov A. M., Tyurnev V. V.
Заглавие : A microstrip diplexer based on dual-mode resonators
Место публикации : Tech. Phys. Lett.: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 38, Is. 8. - P.743-746. - ISSN 1063-7850, DOI 10.1134/S1063785012080172
Примечания : Cited References: 14. - This study was supported in part by the Siberian Branch of the Russian Academy of Sciences (interdisciplinary integration project no. 109) and the federal targeted program "Scientific and Pedagogical Personnel of Innovative Russia (2009-2013)."
Предметные рубрики: DESIGN
Аннотация: A miniature third-order microstrip diplexer comprising a traditional T-shaped dual-mode resonator at the input and one dual-mode resonator of original design, with regular strip conductors split from one end, at the output of each channel. The passband formation in each channel of the diplexer involves two resonances of the lowest modes of one split microstrip resonator and the resonance of one of the two modes of the T-shaped microstrip resonator. The proposed device is simple to manufacture and allows the central frequencies and bandwidths in each channel to be varied within broad limits. The good prospects of the proposed microstrip diplexer are confirmed by the high characteristics of its working prototype.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Serzhantov A. M., Tyurnev V. V.
Заглавие : A miniature dual-band filter based on microstrip dual-mode resonators
Место публикации : Tech. Phys. Lett.: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 38, Is. 9. - P.839-842. - ISSN 1063-7850, DOI 10.1134/S1063785012090180
Примечания : Cited References: 16. - This study was supported in part by the Siberian Branch of the Russian Academy of Sciences (interdisciplinary integration project no. 109) and the federal targeted program "Scientific and Pedagogical Personnel of Innovative Russia (2009-2013)."
Предметные рубрики: PASSBAND RESPONSE
DESIGN
Аннотация: A microstrip dual-band bandpass filter (DBF) with an original miniature design is described. The filter consists of thee microstrip dual-mode resonators, which are rendered dual-mode by splitting their regular strip conductors from one end by longitudinal slots. The formation of one passband of the DBF involves the resonances of even modes of each microstrip double-mode resonator, while the other passband is formed by the resonances of odd modes. The proposed device is simple to manufacture and allows the central frequencies and widths of each passband to be tuned within broad limits. A method of DBF tuning has been developed. Good prospects of the proposed microstrip DBF are confirmed by the high characteristics of its working prototype.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Serzhantov A. M., Tyurnev V. V., Leksikov, Al. A.
Заглавие : Miniature bandpass filter with a wide stopband up to 40F0
Место публикации : Microw. Opt. Technol. Lett.: Wiley-Blackwell, 2012. - Vol. 54, Is. 5. - P.1117-1118. - 2. - ISSN 0895-2477, DOI 10.1002/mop.26751
Примечания : Cited References: 13. - This work was supported in part by the Siberian Branch of the Russian Academy of Sciences under Interdisciplinary integration project No 5 and Federal Target Program "Research and Research-Pedagogical Personnel of Innovation Russia 2009-2013.''
Предметные рубрики: STEPPED IMPEDANCE RESONATOR
OPEN-LOOP RESONATOR
BANDWIDTH
COMBLINE
DESIGN
Coaxial resonators
High selectivity
Metal case
Miniature filter
Narrow band filter
Ultra-wide stopband
Wide stopband
Bandpass filters
Frequency response
Resonators
Ключевые слова (''Своб.индексиров.''): bandpass filter--miniature filter--coaxial resonator--quasi-lumped resonator--ultra wide stopband
Аннотация: A 243-MHz narrowband filter with high selectivity performance has been designed. The filter comprises two electromagnetically coupled quasi-lumped resonators placed into a metal case. Each resonator consists of a tubular capacitor connected in series between two tubular conductors. The measured frequency response of the fabricated filter is presented.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Serzhantov A. M., Tyurnev V. V., Leksikov Al. A., Bal'va Y. F.
Заглавие : Miniature bandpass microwave filter with interference suppression by more than 100 dB in a wide rejection band
Коллективы : Ministry of Education and Science of the Russian Federation [14.513.11.0010]; federal targeted program "Scientific and Pedagogical Personnel of Innovative Russia" [16.740.11.0470, 14.V37.21.1103, 14.V37.21.0070]; Siberian Branch, Russian Academy of Sciences [109]
Место публикации : Tech. Phys. Lett.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2013. - Vol. 39, Is. 8. - P.690-693. - ISSN 1063-7850, DOI 10.1134/S1063785013080026
Примечания : Cited References: 17. - This study was supported by the Ministry of Education and Science of the Russian Federation (state contract no. 14.513.11.0010), the federal targeted program "Scientific and Pedagogical Personnel of Innovative Russia (2009-2013)" (state contract no. 16.740.11.0470), agreement nos. 14.V37.21.1103 and 14.V37.21.0070, and Integration Project no. 109 (Siberian Branch, Russian Academy of Sciences).
Предметные рубрики: STEPPED-IMPEDANCE RESONATORS
MICROSTRIP FILTERS
STOPBAND
FEATURES
DESIGN
Аннотация: A new planar resonator design in which a single conductor is replaced by three parallel stripe conductors located one above the other on a suspended two-layer substrate is proposed. It is shown that the resonator longitudinal sizes can be significantly reduced and, at the same time, the resonator intrinsic Q factor and frequencies of higher oscillation modes can be increased. A fourth-order bandpass filter with a central frequency of the transmission band (relative width 5%) of 1 GHz has been developed and fabricated. This filter has a -100-dB rejection band up to frequencies exceeding 10 GHz. The filter is enclosed in a metallic case with an internal size of 38 x 12 x 7.5 mm. It is shown that a similar filter fabricated in accordance with low-temperature cofired ceramic (LTCC) technology has a -40-dB rejection band up to 30 GHz, with sizes reduced to 5.0 x 4.25 x 1.24 mm.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Beznosikov B. V., Aleksandrov K. S.
Заглавие : Layered perovskite-like crystals with (Al+Cl) stacks in the structure
Место публикации : J. Struct. Chem. - 2000. - Vol. 41, Is. 6. - P.1004-1008. - ISSN 0022-4766, DOI 10.1023/A:1010363124148
Примечания : Cited References: 16
Предметные рубрики: CUPRATE
DESIGN
Аннотация: Crystal-chemical analysis has been performed on layered perovskite-like structures with (Al+Cl) binary stacks, which are combinations of anionic octahedra with halves of degenerate octahedra (semioctahedra). Crystal data are reported for 56 possible prephases, of which 54 are new ones. Recommendations for syntheses of new compounds are given.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zobov V. E., Shauro V. P.
Заглавие : On time-optimal NMR control of states of qutrits represented by quadrupole nuclei with the spin I=1
Разночтения заглавия :авие SCOPUS: On time-optimal NMR control of states of qutrits represented by quadrupole nuclei with the spin i = 1
Место публикации : J. Exp. Theor. Phys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2011. - Vol. 113, Is. 2. - P181-191. - ISSN 1063-7761, DOI 10.1134/S1063776111060094
Примечания : Cited References: 48. - This work was supported by the Russian Foundation for Basic Research (project no. 09-07-00138) and the Dynasty Foundation.
Предметные рубрики: QUANTUM COMPUTATION
MAGNETIC-RESONANCE
ALGORITHMS
ELEMENTS
PULSES
DESIGN
QUDITS
GATES
Ключевые слова (''Своб.индексиров.''): logical operators--nuclear spins--numerical optimizations--optimality--physical parameters--quadrupole nuclei--qutrits--radio frequencies--rf pulse--three level systems--time dependence--time-optimal--computer control systems--computer simulation--fourier transforms--optimization--quantum computers--resonance--nuclear quadrupole resonance
Аннотация: Elementary logical operators (selective rotation, Fourier transform, controllable phase shift, and SUM gate) are considered for a quantum computer based on three-level systems (qutrits) represented by nuclear spins I = 1 under nuclear magnetic resonance conditions. The computer simulation of the realization of these operators by means of simple and composite selective radiofrequency (RF) pulses and optimized RF pulses is performed. The time dependence of the amplitude of last pulses is found by numerical optimization at different durations. Two variants are proposed for realization of a two-qutrit SUM gate by using one-qutrit or two-qutrit optimized RF pulses. The calculated time dependences of realization errors were used to study the time optimality of different methods for obtaining gates, proposed earlier and in this paper. The advantages and disadvantages of each of the methods are evaluated for different values of physical parameters.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Voloshin A. S., Bulavchuk A. S., Galeev R. G.
Заглавие : A miniature filter on a suspended substrate with a two-sided pattern of strip conductors
Место публикации : Tech. Phys. Lett.: MAIK Nauka-Interperiodica / Springer, 2016. - Vol. 42, Is. 6. - P.622-625. - ISSN 10637850 (ISSN), DOI 10.1134/S1063785016060195
Примечания : Cited References: 15. - This study was supported in part by the Ministry of Education and Science of the Russian Federation, project no. 14.607.21.0039.
Предметные рубрики: HAIRPIN RESONATORS
BANDPASS FILTER
WIDE-STOPBAND
100 DB
MICROWAVE
FEATURES
DESIGN
Аннотация: A miniature bandpass filter of new design with original stripline resonators on suspended substrate has been studied. The proposed filters of third to sixth order are distinguished for their high frequency-selective properties and mush smaller size in comparison to analogs. It is shown that a broad stopband extending above three-fold central bandpass frequency is determined by weak coupling of resonators at resonances of the second and third modes. A prototype sixth-order filter with a central frequency of 1 GHz, manufactured on a ceramic substrate with dielectric permittivity ε = 80, has contour dimensions of 36.6 × 4.8 × 0.5 mm3. Parametric synthesis of the filter, based on electrodynamic 3D model simulations, showed quite good agreement with the results of measurements.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaev B. A., Tyurnev V. V., Volkov N. V.
Заглавие : Scattering of Electromagnetic Waves on a Subwave Lattice of Square Strip Conductors
Коллективы : Ministry of Education and Science of the Russian Federation [14.575.21.0279, RFMEFI57517X0142]
Место публикации : J. Commun. Technol. Electron. - 2019. - Vol. 64, Is. 7. - P.664-674. - ISSN 1064-2269, DOI 10.1134/S1064226919070039. - ISSN 1555-6557(eISSN)
Примечания : Cited References: 24. - The study was supported by the Ministry of Education and Science of the Russian Federation (agreement no. 14.575.21.0279, unique project identifier RFMEFI57517X0142).
Предметные рубрики: MULTILAYER BANDPASS FILTER
DIELECTRIC LAYERS
DESIGN
MESH
Аннотация: Simple formulas are obtained for calculating the scattering matrix of a plane electromagnetic wave incident normally on an infinite 2D lattice formed by square strip conductors and located at the interface of two dielectric media. For the first time, the vortex behavior of the electric field of the lattice was taken into account, which made it possible to repeatedly reduce the computation error at high frequencies. This is confirmed by the close agreement of the amplitude-frequency responses of the structure calculated by the formulas with the characteristics obtained by the numerical electrodynamic analysis of the 3D model when the lattice period is less than half the wavelength.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sokolov A. Е., Ivanova O. S., Fedorov A. S., Kovaleva E. A., Vysotin M. A., Lin, C-R, Ovchinnikov S. G.
Заглавие : Why the magnetite-gold core-shell nanoparticles are not quite good and how to improve them
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-52-52002]; Ministry of Science and Technology of TaiwanMinistry of Science and Technology, Taiwan [109-2112-M-153-003, 108-2923-M-153-001-MY3]
Место публикации : Phys. Solid State. - 2021. - Vol. 63, Is. 10. - P.1536-1540. - ISSN 1063-7834, DOI 10.1134/S1063783421090365. - ISSN 1090-6460(eISSN)
Примечания : Cited References: 35. - This study was supported by the Russian Foundation for Basic Research, project no. 19-52-52002, and the Ministry of Science and Technology of Taiwan, projects MOST nos. 109-2112-M-153-003 and 108-2923-M-153-001-MY3
Предметные рубрики: IRON-OXIDE NANOPARTICLES
TOTAL-ENERGY CALCULATIONS
STABILITY
DESIGN
Аннотация: The nature of the formation of a chemical bond at the magnetite-gold interface has been studied. The geometric structure and the electronic and magnetic properties of plane layers consisting of magnetite Fe3O4 and gold have been investigated using the DFT-GGA calculation. It has been found that the specific energy and the wetting parameter of the magnetite-gold interface are negative, which leads to the island growth of small Au particles on the Fe3O4 surface. The role of an intermediate thin titanium layer between magnetite and gold has been discussed. The specific energy and wetting parameter of the magnetite-titanium (for thin Ti layers) and magnetite-titanium-gold interfaces are positive. It has been suggested that an intermediate thin titanium layer at the interface between the magnetite nanoparticle surface and the gold layer will make it possible to obtain magnetite nanoparticles with a continuous gold coating.
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