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A 10 GHz monolithic filter based on stripline resonators with a split conductor / I. V. Govorun, B. A. Belyaev, Ya. B. Zav'yalov [et al.] // Dokl. Phys. - 2023. - Vol. 68, Is. 12. - P. 434-439, DOI 10.1134/S1028335823120030. - Cited References: 18. - This work was carried out within the framework of Agreement no. 470 of August 30, 2022, between the Institute of Physics, Siberian Branch, Russian Academy of Sciences; the Regional Science Foundation; and JSC NPP Radiosvyaz, for a competition of scientific, technical, and innovative projects in the interests of the first climate Scientific and Educational Center "Yenisei Siberia" . - ISSN 1028-3358. - ISSN 1562-6903
Кл.слова (ненормированные):
bandpass filter -- frequency response -- return loss -- insertion loss -- impedance -- layered structure
Аннотация: The monolithic design of a compact bandpass filter X-band is made on the technology of multilayered printed circuit boards. Quarter-wave stripline resonators of the filter have two conductors divided by a layer of prepreg having low parameters that bond together the design. This eliminates the influence of the prepreg on the characteristics of the devices, ensuring good repeatability of filters in mass production. To increase the high-frequency stopband of the filter, one of the conductors of each resonator is cut in half by a transverse slit. The constructive sizes of the device were obtained by parametric synthesis using the electrodynamic analysis of its 3D model. The experimental data of the five-order filter are in good agreement with the electromagnetic simulation of filter of the 3D model. The experimental device has a central frequency of the passband of 10 GHz and a fractional bandwidth of 5.7%, and its dimensions and weight are 18.0 × 5.4 × 2.1 mm3 and 0.5 g. The important advantage of the developed design is the possibility of its installation on the board using the surface mounting method.

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Публикация на русском языке Монолитный фильтр с центральной частотой полосы пропускания 10 ГГц на полосковых резонаторах с расщепленным проводником [Текст] / И. В. Говорун, Б. А. Беляев, Я. Б. Завьялов [и др.]. - 7 с. // Доклады Академии наук. Физика, технические науки. - 2023. - Т. 513 № 1. - С. 88-94

Держатели документа:
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russia
Siberian State University of Science and Technology, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia

Доп.точки доступа:
Govorun, I. V.; Говорун, Илья Валерьевич; Belyaev, B. A.; Zav'yalov, Ya. B.; Shumilov, T. Y.; Afonin, A. O.; Афонин, Алексей Олегович; Ugryumov, A. V.; Угрюмов, Андрей Витальевич; Galeev, R. G.
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A Surface Wave Excitation by a Finite Phased Plane Waveguide Array with an Impedance Flange / Komarov S.A., Scherbinin V.V. // 12th International Conference on Mathematical Methods in Electromagnetic Theory, 2008, Odesa, Ukraine, 2008. pp. 314-316

Доп.точки доступа:
Komarov, S. A.; Scherbinin, V. V.; Щербинин, Всеволод Владиславович
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    Design of a multibeam metasurface antenna for LEO satellite communications payload / A. V. Chesnitskiy, A. N. Kosmynin, K. N. Kosmynina, K. V. Lemberg // Eng. Res. Express. - 2022. - Vol. 4, Is. 4. - Ст. 045025, DOI 10.1088/2631-8695/aca318. - Cited References: 32. - The experimental research was carried out with the financial support of the RFBR, the Government of the Krasnoyarsk Territory and the Krasnoyarsk Regional Science Foundation within the framework of the scientific project 20–47–243002 . - ISSN 2631-8695
   Перевод заглавия: Разработка многолучевой антенны на основе метаповерхности для низкоорбитальных спутниковых группировок
Кл.слова (ненормированные):
metasuface antennas -- multibeam -- anisotropic impedance -- LEO satellite canstellations -- software defined RAN -- 6G networks
Аннотация: In this paper, we propose a novel method for synthesizing a multibeam metasurface antenna (MSA) for use in a space application - a payload component of a small satellite as part of a low Earth orbit (LEO) satellite communication constellation. MSA is synthesized using the holographic technique with a divergent phase distribution. Using this method, a low-cost multi-beam Ku-band antenna with seven flattened beams is developed. The results of the numerical simulation and experimental study of the proposed seven-beam MSA were presented. The gain of each beam is about 25 dBi, the aperture efficiency of the MSA is ∼40%. Each individual beam had a separate feed point and its own inclination angle (0°, ±3.5°, ±7°, ±10.5°). This paper shows that the presented MSA is not inferior in its characteristics to similar solutions, but is more compact and lighter, and also allows the formation of complex radiation patterns.

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Держатели документа:
Rzhanov Institute of Semiconductor Physics, Russian Academy of Sciences, Siberian Branch, Novosibirsk, Russia
MatrixWave LLC, Moscow, Russia
Skolkovo Institute of Science and Technology, Moscow, Russia
Federal Research Center 'Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences', Krasnoyarsk, Russia

Доп.точки доступа:
Chesnitskiy, A. V.; Kosmynin, A. N.; Kosmynina, K. N.; Lemberg, K. V.; Лемберг, Константин Вячеславович
}
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Dielectric and transport properties, electric polarization at the sequential structural phase transitions in iron-substituted bismuth pyrostannate / S. S. Aplesnin, L. V. Udod, M. N. Sitnikov, O. B. Romanova // Ceram. Int. - 2021. - Vol. 47, Is. 2. - P. 1704-1711, DOI 10.1016/j.ceramint.2020.08.287. - Cited References: 33. - The reported study was funded by Russian Foundation for Basic Research project № 20-52-00005 Bel_a . - ISSN 0272-8842
Кл.слова (ненормированные):
Dielectric properties -- Impedance -- Electrical conductivity -- Electric polarization -- Thermopower
Аннотация: The electrical characteristics including the electrical resistance, impedance, I–V characteristics, capacitance, dissipation factor, and thermoelectric power of the Bi2Sn2-хFeхO7 (х = 0.1, 0.2) stannates have been investigated in the temperature range of 100–600 K at frequencies of 102–106 Hz. The paramagnetic contribution of electrons to the dynamic magnetic susceptibility has been established. The conductivity mechanism of the compounds has been found from the I–V characteristics and the change in the carrier sign has been determined from the thermoelectric power. The hysteresis of the I–V curves, charge transfer currents and polarization current have been observed in the Bi2Sn1·8Fe0·2O7 compound. A nonlinear field dependence of the polarization in the orthorhombic phase has been found. The correlation between the obtained characteristics and the phase structure transitions has been established. Two relaxation channels and activation energy have been found using the Debye model. The hysteretic I–V characteristics have been explained using a model of the electronic structure and the dipole and migration polarization.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Udod, L. V.; Удод, Любовь Викторовна; Sitnikov, M. N.; Romanova, O. B.; Романова, Оксана Борисовна
}
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Effect of electrode material on impedance spectra of metal-polyethylene structures with carbon nanotubes / N. A. Drokin [et al.] // Phys. Solid State. - 2012. - Vol. 54, Is. 4. - P. 844-848, DOI 10.1134/S1063783412040063. - Cited References: 15. - This study was supported by the Ministry of Education and Science of the Russian Federation within the framework of the Russian Federal Targeted Program "Scientific and Scientific-Pedagogical Human Resources for the Innovative Russia in 2009-2011" and the Presidium of the Russian Academy of Sciences (integration project no. 27.1). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
SPECTROSCOPY
Аннотация: The effect of an electrode material on electrical properties of a composite material based on super-high-molecular polyethylene (SHMPE) filled with carbon nanotubes has been studied using impedance spectroscopy. Using the method of replacing the sample by an equivalent electric circuit, it has been found that, depending on the electrode material, a blocking barrier with high active resistance and a space charge region adjacent to it arise in the interface region. It has been shown that the barrier height is controlled by surface electronic states of SHMPE and weakly depends on the electron work function of metal electrodes (Bardeen barrier). The characteristic times of electrical relaxation characterizing bulk and interface regions of the composite under study have been determined.

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Публикация на русском языке Влияние материала электродов на импедансные спектры структур металл-полиэтилен с углеродными нанотрубками [Текст] / Н. А. Дрокин [и др.] // Физ. тверд. тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54 вып. 4. - С. 791-796

Держатели документа:
[Drokin, N. A.
Glushchenko, G. A.
Osipova, I. V.
Maslennikov, A. N.
Churilov, G. N.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Drokin, N. A.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
[Kokourov, G. A.] Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Kokourov, G. A.; Glushchenko, G. A.; Глущенко, Гарий Анатольевич; Osipova, I. V.; Осипова, Ирина Владимировна; Maslennikov, A. N.; Масленников, Алексей Николаевич; Churilov, G. N.; Чурилов, Григорий Николаевич
}
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    Electrically-tunable reflectarrays for millimeter waves based on liquid-crystal-loaded high-impedance surfaces / S. A. Kuznetsov, V. I. Lapanik, A. A. Lugouskiy [et al.] // The 5-th International conference "Terahertz and microwave radiation: generation, detection and applications" (TERA-2023) : abstract book. - Москва, 2023. - P. 11
   Перевод заглавия: Электрически перестраиваемые отражательные решетки для миллиметрового диапазона волн на основе высокоимпедансных поверхностей с жидкими кристаллами

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Держатели документа:
Novosibirsk State University
Shevchenko Institute of Applied Physical Problems, Minsk, Belarus
Kirensky Institute of Physics, Federal Research Center KSC SB RAS
Siberian Federal University

Доп.точки доступа:
Kuznetsov, S. A.; Lapanik, V. I.; Lugouskiy, A. A.; Timofeev, S. N.; Sutormin, V. S.; Сутормин, Виталий Сергеевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; "Terahertz and microwave radiation: generation, detection and applications", International conference(5 ; 2023 ; Feb. 27- March 2 ; Moscow, Russia); «Терагерцевое и микроволновое излучение: генерация, детектирование и приложения», конференции с международным участием(5 ; 2023 ; 27 февр. - 2 марта ; Москва); Национальный исследовательский ядерный университет МИФИ; Московский государственный университет им. М.В. Ломоносова; Национальный исследовательский центр "Курчатовский институт"
}
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Aplesnin, S. S.
Electronic transition, ferroelectric and thermoelectric properties of bismuth pyrostannate Bi2(Sn0.85Cr0.15)2O7 / S. S. Aplesnin, L. V. Udod, M. N. Sitnikov // Ceram. Int. - 2018. - Vol. 44, Is. 2. - P. 1614-1620, DOI 10.1016/j.ceramint.2017.10.082. - Cited References: 41. - The authors would like to thank M. Molokeev for the clarification of x-ray spectra. The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project № 16–52-00045 bel_a. . - ISSN 0272-8842
Кл.слова (ненормированные):
Dielectric properties -- Ferroelectric properties -- Impedance -- Thermopower -- Electrical properties
Аннотация: The ferroelectric properties of bismuth pyrostannate Bi2(Sn0.85Cr0.15)2O7 in the high-temperature region are established. The linear thermal expansion coefficient, electrical resistance, impedance, I−V characteristics, capacitance, loss-angle tangent, charge, and thermopower of the investigated material are measured in the temperature range of 300−700 K at frequencies of 102−106 Hz. Anomalies of the thermal expansion coefficient and hodograph spectrum variation in the region of polymorphic phase transitions are observed. The high resistance and change of the hopping conductivity for the tunnel-emission are found. The hysteresis in the electric field dependence of polarization is established. The change in the thermopower sign with temperature is revealed. The obtained experimental data are explained in the framework of the model of migration polarization by charged chromium ions.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50, Krasnoyarsk, Russian Federation
Siberian State Aerospace University M. F. Reshetnev, Krasnoyarsky Rabochy Av. 31, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Udod, L. V.; Удод, Любовь Викторовна; Sitnikov, M. N.; Аплеснин, Сергей Степанович
}
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Electrophysical properties of BeO + 30 wt.% TiO2 ceramics sintered at elevated temperatures / N. A. Drokin, V. S. Kiiko, A. I. Malkin, A. V. Pavlov // Refract. Ind. Ceram. - 2022. - Vol. 63, Is. 3. - P. 315-320, DOI 10.1007/s11148-022-00728-3. - Cited References: 11 . - ISSN 1083-4877. - ISSN 1573-9139
Кл.слова (ненормированные):
(BeO + TiO2) ceramics -- electrophysical properties -- activation energy of electrical resistivity -- impedance spectroscopy -- dielectric permittivity -- TiO2 nanopowder
Аннотация: The electrophysical properties of BeO-based ceramics with introduced micro- and nanoparticles of TiO2 were investigated by impedance spectroscopy in the frequency range of 100 Hz – 100 MHz. In order to increase the density and conductivity, the initial ceramic components were sintered at the highest possible temperatures up to 1660°C, followed by annealing in hydrogen at 800°C. In this case, TiO2 was strongly reduced with the formation of lower titanium oxides (Ti3O5) along with metallic titanium. When interacting with hydrogen, TiH2 is formed. For the first time, impurity phases were found in (BeO + TiO2) ceramics, which can significantly alter its bulk and surface properties. The resulting ceramics has a high reach-through conductivity, which increases significantly after an additional thermal annealing in hydrogen. It was established that the activation energy of conductivity does not depend much on the concentration of TiO2 nanoparticles and decreases significantly in the low-temperature region. The method of constructing equivalent electrical circuits was used to simulate the passage of the active and reactive components of the current through the complex internal structure of the ceramics.

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Публикация на русском языке Электрофизические свойства спеченной при повышенных температурах керамики BeO + 30 мас. % TiO2 [Текст] / Н. А. Дрокин, В. С. Кийко, А. И. Малкин, А. В. Павлов // Нов. огнеупоры. - 2022. - № 6. - С. 21-27

Держатели документа:
Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, Krasnoyarsk, Russia
Ural Federal University, Yekaterinburg, Russia
Siberian Federal University, Krasnoyarsk, Russia

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Kiiko, V. S.; Malkin, A. I.; Pavlov, A. V.
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Electrophysical properties of hydroxylated endohedral metallofullerene with gadolinium / A. I. Dudnik [et al.] // J. Phys. Chem. Solids. - 2019. - Vol. 135. - Ст. 109094, DOI 10.1016/j.jpcs.2019.109094. - Cited References: 35. - The reported study was funded by RFBR according to the research project No 18-29-19003. . - ISSN 0022-3697
Кл.слова (ненормированные):
Endohedral metallofullerene -- Fullerenol -- Impedance -- Dielectric permittivity -- Ionic and proton conductivity -- Dielectric hysteresis -- Polarizability
Аннотация: The paper presents the results of experimental measurements of constitutive and electrophysical properties in hydroxylated endohedral metallofullerene with gadolinium sample. We extracted endohedral metallofullerene from carbon condensate, synthesized in high-frequency arc discharge plasma. Later hydroxyl groups were added. Via methods of infrared and x-ray photoelectronic spectroscopy, it was established that the molecules of hydroxylated endohedral metallofullerene have the Gd@C82Ox(OH)y, x + y=(40–42) composition. The method of measuring the electrical impedance in the frequency range from 100 Hz to 100 MHz shows that the resulting hydroxylated fullerene is an ion conductor. The measured frequency dependences of the dielectric permittivity and conductivity of hydroxylated fullerene are explained based on the assumption of an inhomogeneous distribution of electric charges in the material volume. Dielectric-hysteresis loops in the frequency range of 25 Hz–1 MHz and temperature range of 80–300 K, and volt-ampere characteristics were measured. The obtained results imply the appearance of residual polarization induced by the electric field in hydroxylated fullerene. However, the constant dipole moment is absent. © 2019

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Dudnik, A. I.; Дудник, Александр Иванович; Vnukova, N. G.; Внукова, Наталья Григорьевна; Drokin, N. A.; Дрокин, Николай Александрович; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Shestakov, N. P.; Шестаков, Николай Петрович; Tomashevich, Y. V.; Churilov, G. N.; Чурилов, Григорий Николаевич
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10.

    Enhancement of ferromagnetism and ferroelectricity by oxygen vacancies in mullite Bi2Fe4O9 in the Bi2(Sn0.7Fe0.3)2O7-x matrix / S. S. Aplesnin, L. V. Udod, M. N. Sitnikov [et al.] // J. Magn. Magn. Mater. - 2022. - Vol. 559. - Ст. 169530, DOI 10.1016/j.jmmm.2022.169530. - Cited References: 47 . - ISSN 0304-8853
   Перевод заглавия: Усиление ферромагнетизма и ферроэлектричества в муллите Bi2Fe4O9 в матрице Bi2(Sn0.7Fe0.3)2O7 c кислородными вакансиями
Кл.слова (ненормированные):
Remanent magnetization -- Remanent polarization -- Magnetic hysteresis -- Electrical hysteresis -- Impedance -- Permittivity
Аннотация: A new bismuth pyrostannate-based composite Bi2(Sn0.7Fe0.3)2O7-x/Bi2Fe4O9 (BSFO/BFO) has been obtained by the solid-state synthesis. Temperature dependences of the magnetic hysteresis and remanent magnetization and the nonlinear field dependence of the magnetization for the Bi2Fe4O9 antiferromagnet have been established. A temperature of the formation of canted sublattices in the antiferromagnet with the occurrence of a spontaneous moment in mullite has been determined. The mechanism of the electric polarization hysteresis and the temperature dependence of the remanent polarization have been established. It has been shown, that, below the Néel temperature, the dipole polarization is induced by a lone electron pair of bismuth ions. At T > TN, the migration polarization is caused by the charge carrier density at the chemical potential. A significant increase in the remanent magnetization of mullite in the bismuth pyrostannate matrix with oxygen vacancies over a value typical of polycrystalline mullite has been established. Remanent magnetization is explained in terms of ferron model.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Udod, L. V.; Удод, Любовь Викторовна; Sitnikov, M. N.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Romanova, O. B.; Романова, Оксана Борисовна; Shabanov, A. V.; Шабанов, Александр Васильевич
}
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