Gennady P. Sinyavsky

Object-oriented approach to software implementation of virtual laboratory workshop

The method of computer simulation of microwave devices and special laboratory workshops is described. Simulated laboratory has a module structure. The basis for constructing a model of the specific workshop is a concept of the abstract “device” with layout is identical to the installation of a real one. As an example the laboratory work which includes sweep frequency generator, VSWR/Attenuation Scope and a band-pass waveguide filter was simulated. The software interface allows changing the frequency tags and filter configuration to carry out all necessary measuring characteristics.

Analysis of ferromagnetic structures fast-acting under the influence of external magnetic fields of various intensity

Research is focused on fast processes in radioelectronic devices using ferromagnetic materials when electromagnetic fields of various intensity affect them. Ways of accelerating the processes for increasing microwave equipment fast-action are considered. 3-D and 2-D ferromagnetic materials characteristics are analyzed to improve MRAM technology which arose from memory on magnetic cores and which is implemented on thin magnetic films. Multiferroics domain structure is considered, radiophysical processes in nonlinear ferromagnetic environment (nonlinear parametrical resonance, generation and amplification of electromagnetic oscillations) are investigated. Transient processes duration in nonlinear parametrical zonal systems (NPS) working at current ultraharmonics in highest zones of oscillations instability is considerably reduced and tends to zero because of abrupt phase transition. Due to this, fastaction of NPS devices is increased considerably, even if traditional 3-D ferromagnetic materials are used to devices fabricating. Thin-film structures fast-action increases still more and take nanoseconds, that allows upgrading MRAM technology as nanotechnology.

Fast and accurate full-wave analysis of large slotted waveguide array antennas

A novel fast and accurate full-wave approach to the analysis of a wide class of slotted waveguide arrays is presented. The numerical-analytical solution is based on Galerkin method with weighted Chebyshev polynomials as basis functions explicitly accounting for the field asymptotic at the edges. A dramatically fast convergence of the method is achieved due to proper basis functions. The second key point of the solution is the acceleration of double series and integrals which are the matrix elements of a final system of linear algebraic equations. The comparison of results with available experimental and theoretical data shows a good agreement. The results for travelling-wave array with 120 shunt slots for radar applications are considered.

Diffraction of electromagnetic wave by an array of complex shape microstrip reflectors

An approach for solving the problem of electromagnetic wave diffraction by an array of complex shape microstrip reflectors is proposed. The approach employs a basis function taking into account the edge condition in all the points of complex shape microstrip reflectors except the corner ones. Several numerical results for polygon-shape microstrip reflector arrays are presented.

Electrodynamic characteristics of periodic nonlinear composite structures based on opal matrices and carbon nanostructures with ferromagnetic inclusions

The research of electrodynamic characteristics of periodic nonlinear composite structures based on opal matrices and metal-carbon nanostructures with ferromagnetic inclusions is meant to produce new hardware components for XXI century radio electronics. It is understood that these nanostructures have a great potential use in advanced nanotechnologies designed for new generation of SFH and EFH radioelectronic devices. The structures have impressive capabilities to optimize device functional specifications for electric and magnetic fields. The research of the nanostructures with preset properties is the main problem for terahertz electronics. These properties provide means to nanostructure parameter management; thus, the structures can be applied to construct resonant circuits for nonlinear parametric zonal systems (NPS), which are operating within current ultraharmonics in higher instability zones of electromagnetic oscillations.

Potential of nonlinear parametric zonal systems at development of SubTHz and THz radioelectronics of the future

In this report the prospects of new element baseline of subTHz and THz bands making on the basis of nonlinear parametric zonal systems working on current ultra-harmonics in the highest zones of electromagnetic oscillations instability are observed. Estimations of their possibilities at implementation of these systems on the base of nanolevel composite medium are made. Various versions of this problem solution are observed and main outlines of possible models, oriented as on improving of separate characteristics of up-to-date microwave devices, and on the development of elements baseline of new generation of SHF, EHF and HHF bands are offered. The proposed models of subTHz and THz ranges devices can became the starting point of development of nonlinear parametric zonal systems on the base of material composite media.

Possibilities of nonlinear parametric zonal systems application on the base of passive magnetophotonic structures at low temperatures

In this paper the possibilities of passive magnetophotonic nanostructures application in low-temperature conditions of Arctic and Antarctic regions, near cosmic space and physics of high energies conditions are considered. Carried out examinations have shown that, in dependence on used magnetic materials, their crystallo-graphic structure, topology of arrangement (1D or 2D), technology of using, concentration and distribution inside crystal structure and many other factors, is possibly to create such ferromagnetic structure that is able to function successfully at low temperatures and influence of ionized radiation. Such climatic conditions are peculiar to Arctic and Antarctic regions, temperature circumstances of near cosmic space and to operating conditions in the physics of high energies. Passive magnetooptical structures are intended for the work in extremal conditions.

Periodic nonlinear composite media on the base of nanophotonic, metallophotonic and magnetophotonic crystals

The investigation of electrodynamic characteristics of periodic nonlinear composite media on the base of nanophotonic, metallophotonic and magnetophotonic crystals are guided on making of new element base of radioelectronic engineering of XXI century. Nanophotonics has great potential of application in perspective nano-technologies guided on making of the radioelectronic arrangements of sub-THz and THz-ranges (SHF, EHF and HHF bands). Photonic crystal nanostructures possess the impressive possibilities on creating of perspective devices with small energy consumption and low losses. The research of nanophotonic structures with dynamic in homogeneities, using the interacting of electronic streams with wave processes in the solid bodies; the properties of semiconductors, dielectrics, magnetics and superconductors in magnetic and electric fields is very important component of THz electronics engineerings.

Research of electrodynamic characteristics of nanophotonic structures

Nanophotonic crystals and their varieties — metallo-photonic and magnetophotonic structures have unique characteristics. Study of their electrodynamic peculiarities is related to requirements of plasmonic resonances origination and possibilities of optical radiation transmission through photonic nanostructures, containing metal inclusions. Investigation of nanophotonic structures with dynamic in homogeneities, using interacting of electronic fluxes with wave processes in rigid (solid) bodies, properties of semiconductors, dielectrics, magnetics and superconductors, in magnetic and electric fields, is important component of sub-THz and THz electronics engineering. The diffraction problem for three-layer nanostructure is explored in-process; differential equation for observed configuration of crystal lattice cell is received. Influence of light on reversing magnetisation properties of nanophotonic structures and possibilities of using of microstructured or photonic crystal fiber is explored.

Electrodynamic characteristics estimation for aperiodic random composite media

The paper presents approaches to electro-dynamic characteristics estimation for artificial composite media, among which a periodic random media are especially distinguished. Resonant circuit implementation based on thin-film ferromagnetic nanostructures is possible in a periodic composite media. Chiral media, photonic, magnonic crystals and layered structures are of particular interest. Approaches based on spin waves excitation are important for ferromagnetic nanostructure study. Propagation and scattering of electromagnetic waves in near-field and far-field regions of plane structure for layered structures in composite media can be described with Maxwells equations in mag-netostatic approximation, electrodynamic and exchange boundary conditions, and Greens method of tensor functions.