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## Publications

Publications (62)

A microstrip pattern-forming circuit designed to form sector radiation pattern of a linear antenna array. Proposed approximate method of device synthesis, including analysis of an infinite periodic system of related microstrip lines. Based on the found generalized parameters of the structure, the design was selected tive parameters of the circuit....

A leaky-wave bifocal linear array focused in the Fresnel zone is considered. The structural parameters provide perfect focusing of the field at two points corresponding to two different frequencies. An approximate theory of antenna arrays is used to analyze the bifocal array, to study the shape of the frequency scanning arc, and to determine the fi...

Electromagnetic bandgap (EBG) waveguides formed in a two-dimensionally periodic lattice of capacitive metal cylinders located between two metal screens are considered. The cylinders have a gap between one of the ends and the screen. It is shown that the lower critical frequencies of such waveguides are shifted upwards in comparison with the corresp...

The propagation of guided waves along two identical metal gratings symmetrically lying on both sides of a dielectric substrate is studied. Earlier, investigation of the properties of such waves has been restricted to odd waves equivalent to waves in grounded dielectric substrate. Averaged boundary conditions for the fields at the grating were used...

The frequency characteristics of the radiators of ТМ01 and ТЕ01modes of a circular metal waveguide are investigated. Radiators in the form of an open end of a circular waveguide with a stepped cut, including those with a cylindrical mirror, as well as an open end of a waveguide with an inhomogeneous anisotropic dielectric plate are considered. Nume...

The article investigates an electromagnetic crystal in the form of metal cylinders with capacitive gaps in the nodes of a rectangular two-dimensional periodic lattice between metal screens forming a flat waveguide. Using a standard electrodynamic modeling system, the authors studied the diffraction of a plane wave at the boundary of an infinite lay...

Ray-optic approximation is used to derive an analytical solution to the problem of synthesis of mirrors that form an axisymmetric three-mirror system with predetermined main mirror. Such a system provides transformation a spherical front of a source into an arbitrary front with the desired mapping law. The generatrix of an auxiliary mirror is repre...

A 2D array of radiators with raster frequency scanning focused in the Fresnel zone is presented. The problem of determining the radiator positions for field focusing at a finite distance from the array plane is solved. An approximate matrix model of the array antenna describing its properties as a microwave multiport and allowing determination of t...

Theoretical investigation of a two dimensional
periodical Vivaldi antenna array is presented. The array model
in form of a system of coupled slot lines with variable parameters
is proposed. Integral equations that describe all array eigen
modes: TE, TM, TEM are obtained and solved. Effects of
blindness and depolarization are numerically studied. An...

The results of design and experimental investigation of a multibeam planar three-layer double-reflector system in the millimeter wave band are presented. A Schwarzschild aplanatic reflector system with symmetric generatrices is considered. The system parameters have been chosen as a result of optimization of this system with the use of the method o...

A 2D array of radiators excited by the modes of a planar array of parallel waveguides and focused in the Fresnel zone is considered. The problem of determining the positions of array radiators for focusing the field at a finite distance from the array aperture is solved for the cases of plane and cylindrical fronts of the initial distribution of th...

The problem of synthesis of planar two- layer mirror-lens systems that convert a cylindrical front into a flat one is considered. Differential equations for the surfaces of the mirror-lens and lens-mirror systems are obtained. As a result of numerical integration of differential equations for the mapping of the law, satisfying the Abbe "sine" condi...

Results of research of aberrations in Sсhwarzschild symmetric two-mirror systems with use of ray tracing technique are presented. The algorithm of analysis and minimization of aberrations of inclined meridional and sagittal rays in the focus area with considering highest orders aberrations is proposed. The dependences of scattering spot radius on p...

Characteristics of a planar double-reflector aplanatic Schwarzschild system that allow estimation of the efficiency of its application in devices of integrated microwave optics are analyzed. The results of multicriteria optimization of the system’s quality indices are obtained. The aplanatic system is compared to systems with parabolic reflectors:...

A millimeter�band planar lens designed on the basis of an inhomogeneous medium with forced
refraction, which is formed by a periodic grating of metal strips placed on the surfaces of a dielectric plate, is
considered. The possibility of application of this lens as the basis for the design of a multibeam receiving
antenna for a radio imaging system...

A multibeam integrated reflector antenna operating in the millimeter wave band is considered. The antenna consists of a radiating array, a planar mirror, and a multichannel feed. The results of simulation of a radiating array of slots in a metal screen are presented. The array is manufactured on the basis of a medium with forced refraction, includi...

The results of the study of aberrations in planar mirror systems are presented. Based on tracing method and imposed mean square aberration ( MSA ) a method for analyzing and minimizing asymmetrical aberrations in the focusing region oblique rays is proposed. Asymptotic relations that characterize the region of parameters with minimal aberrations ha...

Effect of second harmonic generation in non-linear resonator inside electromagnetic crystal formed by an array of metal cylinders with non-linear capacitors located in parallel plate waveguide is investigated. Mathematical model of the structure based on the simultaneous solution of electromagnetic boundary problem and non-linear problem for voltag...

Problems of mathematical modeling and multi-criteria optimization of two-dimensional artificial medias on the base of dielectric slab with isotropic metal strip grids on its surfaces are considered. Approximate equivalent impedance boundary conditions are introduced for description of the grid located between two medias. A model that takes into acc...

An analytical solution to the synthesis problem for the generatrices of the mirrors of an axisymmetric two-mirror objective, which are synthesized for a specified mapping law of the incident and reflected wave fronts, is obtained in the geometrical-optics approximation. The solution, in which the generatrix is expressed in the form of a polynomial...

Problems of the design of a centimeter-band antenna array containing a multichannel power divider based on EBG waveguides
and helical radiators are considered. The general configuration of such an array is proposed. The properties of this array
and the requirements on the array elements are analyzed. Features of the design of two-channel and four-c...

The problems of the designs of elementary radiators for thinned antenna arrays based on the waveguides formed inside a microwave
EBG structure are considered. Technical requirements on such radiators are formulated and it is shown that helical radiators
satisfy these requirements. Theoretical (numerical) and experimental antenna characteristics of...

Novel waveguide devices and antennas for microwave and millimeter wave applications based on electromagnetic bandgap (EBG) structures are presented. The following aspects of the problem are discussed: numerical analysis of elementary and complex EBG power dividers and antenna arrays on their base and analysis of systems of coupled EBG waveguides an...

Proposed and investigated theoretically, numerically and experimentally a new class of beam forming networks for multi-beam hybrid antennas. The main part of the beam-forming network is a system of coupled waveguides. The following types of beam-forming networks are considered: one-dimensional (linear) with identical coupled waveguides and fixed ph...

We describe design of two-polarization imaging array of 7 antenna-coupled TES-bolometers. The fabrication procedure
involves both electron beam lithography and convenient optical lithography resulting in submicron definition of TES
absorber films (down to ~ 0.2 μm) integrated within planar submm-wave antenna. Concept of matching optics between
t...

We describe design of two-polarization imaging array of 7 antenna-coupled TES-bolometers. The fabrication procedure involves both electron beam lithography and convenient optical lithography resulting in submicron definition of TES absorber films (down to ~ 0.2 mum) integrated within planar submm-wave antenna. Concept of matching optics between the...

Effectiveness and interference steady factor of the cellular radio system of atmospheric radio links ″base station (BS) - user″ at millimeter wavelengths with the narrow user antennas are analyzed. There are calculated the dependences of the level of cochannel and interchannel interference at the output of receiver IF filter on the filtering coeffi...

It was originally analytically solved the problem of field distribution of a narrow-directed MM-wave beam behind obstacle. Experiments proved anticipated field levels that are 40 dB higher than the levels of omni-directed decimeter (DM) radiation. It was proposed and verified in series of measurements the model of forming of interference structure...

The results of calculations and analysis of the differential cross section and scatterimg indicatrices of turbulent atmosphere inhomogeneities are given.