Article is devoted a method of numerical synthesis conformal array of the set design, considering polarizing properties of radiating elements, and there any arrangement in aperture under requirements to two mutually orthogonal components of a field. Efficiency of the given method of synthesis is confirmed by numerical modeling of a spherical antenna lattice at calculation of peak-phase distribution within the set active area of a lattice.

An algorithm for the use of digital filtering to the sine and cosine components of the quadrature signal in vector network analyzer is presented. Filters used for calibration and measuring stages to the original signals in volts and end measurements values. The mathematical model of three different methods of digital filtering, used together, and allowing better form quadrature signals and remove the noise of various origins in the analyzed signal is presented.

The synthesis of the algorithm and structural schemes of two-channel discriminator of the angular coordinate meter of the noise-like signal source at linear scanning of the antenna directional diagram is given.

The definition technique of dispersion parameters of broadband matching and the frequency-selective chains based on use of wave properties of loading and demanded function of transfer is presented. The received generalized expressions allow to define S -parameters matching and frequency-selective chains without use of frequency transformations and the approached calculations on the computer.

The algorithm for forming the decision making threshold optimal by criterion of minimum of average risk that takes into account the correlation proportion of the signal and radiolocation background is presented. The working characteristics of the optimal decision making device based on the criterion of minimum of average risk are calculated.

The single crystals (FeIn₂S₄)_0.5·(CuIn₅S₈)_0.5 have been grown using Bridgeman method. Its composition and crystal structure and resistivity were examined. The surface-barrier structures In/(FeIn₂S₄)_0.5·(CuIn₅S₈)_0.5 were created on their basis and their photoelectrical properties were studied.

Texture image segmentation method based on estimation of density of contour elements and absorption of small regions, providing an increase in the accuracy in the selection of texture regions in the images to the specification of their boundaries is proposed.

Composite coatings with tungsten based on silver by electrochemical deposition were made. Influence of electrolyte composition on physical-mechanical properties and functional properties of coatings have been studied. Elements composition of deposit and an influence of the tungstate sodium concentration and deposition regimes on its structure was defined. It was established that including of tungsten oxides in the composition of silver coating allows to form a uniform coating with increased microhardness and wear resistance. Formation mechanisms of composite Ag-W coatings and using them in electronics were discussed.

The article addresses the further development of methods of BCH codes norm decoding. The authors propose to use new syndrome invariants - polynomial invariants of automorphism group G of a family of BCH codes. The paper presents basic properties of polynomial invariants and errors correction technique considered on two-step iteration system of error identification. An efficiency of the method of decoding based on polynomial invariants of G -orbit is demonstrated by the example.

The paper considers the method of forming the stochastic trajectories of multidimensional dynamical systems with desired properties. Projections phase variables on the coordinate axis of the n-dimensional hyperspace representing systems of stochastic differential equations. The proposed method allows to solve optimization problems binding parameters of stochastic trajectory with its average length and time of its passage.

A mathematical analysis of the probability of errors in the reception of signals transmitted over compressed communication channels with orthogonal frequency separation in the presence of fading in the communication channel distributed in accordance with the Nakagami-m distribution law is made. Unlike previous publications, the present work considers the effect of non-uniform distribution of the phase of fading in the communication channel on the probability of errors in signal reception. A unified mathematical expression of the generating function of the moments for fading of the communication channel in the frequency domain, distributed according to the Nakagami-m law, is presented for uneven fading phase distributions in the communication channel. Thus, the classical methods of determining the generating function of moments can be used directly to obtain exact mathematical expressions for the probability of signal reception errors for various types of modulation and signal diversity.

The cylindrical resonators at operating H_{0 in} modes are widely used in measuring technology and gyroresonance microwave devices. However, the E_{1 in} modes resonance coincides with the H_{0 in} one. The article shows for detuning E_{1 in} modes should be used ring slots at the end walls of the resonator.

Numerous publications are devoted to bilevel programming problems. Despite a seemingly simple statement these problems are considerably difficult for numerical solving, and a significant part of research in the field of bilevel programming is devoted to identifying particular subsets of problems that allow for a numerical solution. One of such subsets consists of bilevel problems that possess the partial calmness property. Global partial calmness of bilevel programming problems with a linear lower-level problem is proven in this article.