Труды сотрудников института физики

/ M. A. Popov [et al.] // IEEE Trans. Magn. - 2014. - Vol. 50, Is. 6. - Ст. 4004507, DOI 10.1109/TMAG.2014.2298498. - Cited References: 34 . - ISSN 0018-9464. - ISSN 1941-0069РУБ Engineering, Electrical & Electronic + Physics, Applied

Аннотация: Dielectric resonances in the 37-42 GHz frequency band in the single crystal barium hexaferrite that occur well below the ferromagnetic resonance (FMR) have been investigated. Sample dimensions have been chosen so that the mode frequency is lower than the spin-wave excitation (in this case, the natural domain resonance) frequency. Such dielectric mode frequencies, being a function of both permittivity and permeability, are magnetic field H tunable. Here, we report on below-FMR magnetodielectric resonance (MDR) axially magnetized barium hexaferrites and their H-tuning characteristics. Our studies reveal H-tuning by up to 2.5 GHz and the tuning is the largest when the ferrite is in a magnetically unsaturated state. A theory for the MDR is presented and a fairly good agreement between experimental data and theory has been obtained. Tunable millimeter wave phase shifters and isolators utilizing the below-FMR dielectric resonances have been demonstrated.

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Держатели документа:
Taras Shevchenko Natl Univ Kyiv, Radiophys Dept, UA-01601 Kiev, Ukraine
Oakland Univ, Dept Phys, Rochester, MI 48309 USA
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Popov, M. A.; Zavislyak, I. V.; Movchan, N. N.; Gudim, I. A.; Гудим, Ирина Анатольевна; Srinivasan, G.

/ B. A. Belyaev [et al.] // Tech. Phys. Lett. - 2016. - Vol. 42, Is. 6. - P. 622-625, DOI 10.1134/S1063785016060195. - 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. . - ISSN 1063-7850РУБ Physics, Applied

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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Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Radiosvyaz’ Corporation, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Voloshin, A. S.; Волошин, Александр Сергеевич; Bulavchuk, A. S.; Galeev, R. G.