Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Yu. F. Filippov is active.

Publication


Featured researches published by Yu. F. Filippov.


Technical Physics | 2004

Eigenmodes of an anisotropic dielectric spherical body

Yu. V. Prokopenko; T.A. Smirnova; Yu. F. Filippov

Quasi-TE and quasi-TM oscillations of an anisotropic spherical body immersed in an isotropic medium are studied. An investigation of the set of Maxwell’s equations within the spherical body shows that it reduces to two coupled differential equations, which are analyzed theoretically for small values of the anisotropy parameter. An approximate solution to these differential equations is obtained. A dispersion relation determining the frequencies of the resonant oscillations is derived for the boundary conditions imposed on the surface of the spherical body. The effect of anisotropy on the spectral characteristics of the resonant oscillations is examined.


Radioelectronics and Communications Systems | 2009

Natural oscillations of radially three-layered dielectric resonators

Yu. V. Prokopenko; O. A. Suvorova; Yu. F. Filippov; I. A. Shipilova

Natural oscillations of radially three-layered dielectric resonators have been investigated. The latter have the form of a sphere and cylinder limited by ideally conducting end planes. The expressions for components of electromagnetic fields of natural oscillations and characteristic equations of resonators were obtained. Numerical investigations of resonators were carried out in the 8-millimeter wavelength band. The impact of the middle layer parameters of resonators on their spectral and power characteristics was also analyzed. It was proposed to use such resonators for extracting the complex dielectric permittivity of substances.


Technical Physics Letters | 2007

Effect of a small cylindrical inhomogeneity on the eigenfrequency of a semicylindrical dielectric resonator featuring an axially homogeneous eigenmode

Yu. V. Prokopenko; Yu. F. Filippov; I. A. Shipilova

A semicylindrical dielectric resonator with a thin cylindrical inhomogeneity in the region of the field antinode of a whispering gallery eigenmode has been studied. Characteristic equations determining the complex eigenfrequencies of such resonators with axially homogeneous eigenmodes are obtained. It is shown that the presence of a dielectric or conducting inhomogeneity leads to a frequency shift and causes additional energy losses of the eigenmode.


Technical Physics Letters | 2006

Effect of a ring layer filled with various substances on the eigenfrequency and Q-factor of a cylindrical quasi-optical dielectric resonator

Yu. V. Prokopenko; Yu. F. Filippov; I. A. Shipilova

The influence of a ring layer filled with various substances on the eigenfrequency and Q-factor of a cylindrical quasi-optical dielectric (Teflon) resonator has been investigated. The spectral and energy characteristics of an axially homogeneous whispering gallery eigenmode of this resonator are analyzed for the first time as dependent on the radius and thickness of the ring layer. It is established that the eigenfrequency behaves differently when the ring layer is filled with liquids characterized by large and small losses.


Technical Physics | 2005

Excitation of oscillations in a hemispherical dielectric resonator by a radial magnetic dipole

Yu. V. Prokopenko; Yu. F. Filippov; V. M. Yakovenko

Forced oscillations excited by a radial magnetic dipole in a dielectric hemisphere (resonator) placed on a perfectly conducting plane are studied. It is shown that the dipole excites H modes. When the dipole radiation frequency equals the eigenfrequency of the resonator, an amplitude resonance is observed in the spectrum. The excitation efficiency is high when the magnetic dipole is placed at the maximum of the radial field component of the resonator’s eigenmode.


Technical Physics | 2004

Millimeter-wave whispering gallery modes in an ellipsoidal dielectric resonator with a small ellipticity

A. E. Kogut; Z. E. Eremenko; Yu. F. Filippov; V. V. Kutuzov

It is found that, when the shape of a dielectric sphere (hemisphere) operating under the whispering gallery mode conditions is perturbed by a surface curvature gradient (ellipticity), the unloaded Q factor of the sphere degrades and its resonance frequencies change. It is shown theoretically and experimentally that an elliptic irregularity removes frequency degeneracy of whispering gallery modes at millimeter waves.


Technical Physics Letters | 2003

The influence of finite end screens on the spectrum of oscillations in cylindrical quasioptical dielectric resonators

A. A. Barannik; Yu. V. Prokopenko; Yu. F. Filippov; N. T. Cherpak

We have studied the influence of finite dimensions of the end screens on the spectrum of whispering gallery modes in a teflon cylindrical quasioptical resonator. The dependence of the resonance oscillation frequency on the radius of conducting end screens is determined for the first time. Variation of the screen radius leads to transformation of the axial index of HE modes.


Technical Physics Letters | 1999

High-Q whispering-gallery oscillations in a shielded spherical dielectric cavity

S. N. Khar’kovskii; Yu. F. Filippov; Z. E. Eremenko; A. E. Kogut; V. V. Kutuzov

Results are presented of theoretical and experimental investigations of whispering-gallery oscillations in a shielded isotropic layered spherical dielectric cavity. Oscillations whose Q factor is two orders of magnitude higher than that of the oscillations of an open dielectric sphere are studied. Intermode interaction is observed between various cavity oscillation modes.


Technical Physics | 2000

Resonant frequencies of azimuthal-homogeneous oscillations of an anisotropic sphere

Yu. F. Filippov; Z. E. Eremenko

The anisotropy of parameters is an intrinsic characteristic feature of dielectrics employed in production of high-Q resonators. A theory of azimuthal-homogeneous resonant oscillations in a single-crystal sphere is developed. It is demonstrated that the anisotropy gives rise to TM oscillations of two orders at different frequencies. Oscillations with large polar indices are numerically investigated.


International Journal of Infrared and Millimeter Waves | 2004

Determination of Microwave Parameters of Isotropic Mediums by Using an Open Quasi-Optical Spherical Resonator

V.N. Derkach; Yu. F. Filippov; A.S. Plevako; Yu. V. Prokopenko; T.A. Smirnova

Collaboration


Dive into the Yu. F. Filippov's collaboration.

Top Co-Authors

Avatar

Yu. V. Prokopenko

National Academy of Sciences of Ukraine

View shared research outputs
Top Co-Authors

Avatar

I. A. Shipilova

National Academy of Sciences of Ukraine

View shared research outputs
Top Co-Authors

Avatar

A. A. Barannik

National Academy of Sciences of Ukraine

View shared research outputs
Top Co-Authors

Avatar

N. T. Cherpak

National Academy of Sciences of Ukraine

View shared research outputs
Top Co-Authors

Avatar

T.A. Smirnova

National Academy of Sciences of Ukraine

View shared research outputs
Top Co-Authors

Avatar

V. V. Kutuzov

National Academy of Sciences of Ukraine

View shared research outputs
Top Co-Authors

Avatar

Z. E. Eremenko

National Academy of Sciences of Ukraine

View shared research outputs
Top Co-Authors

Avatar

A. E. Kogut

National Academy of Sciences of Ukraine

View shared research outputs
Top Co-Authors

Avatar

A. Ya. Kirichenko

National Academy of Sciences of Ukraine

View shared research outputs
Top Co-Authors

Avatar

A. Ye. Kogut

National Academy of Sciences of Ukraine

View shared research outputs
Researchain Logo
Decentralizing Knowledge