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Ultrawideband Exiter of the H 01 Mode of a Circular Waveguide J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
V. A. Kaloshin, V. Ch. PhamAbstract A new variant for construction of a exciter of the Н01 mode of a circular metal waveguide using a smooth transition from a singlemode rectangular metal waveguide to a circular multimode waveguide is proposed and analyzed. Electrodynamic simulation and optimization of parameters of the transition are performed with the aid of the finiteelement method and finitedifference method in the time

Wideband Antenna Arrays Based on a Circular Waveguide with the H 01 Mode J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
V. A. Kaloshin, V. Ch. PhamAbstract Two variants of a cophased antenna array excited by the Н01 mode of a circular metal waveguide are proposed and analyzed. In the first and second variants, the array consists of 16 and 24 elements (open ends of a rectangular waveguide), respectively. Electrodynamic simulation and optimization of the antenna parameters are performed using the finiteelement method and finitedifference method

Theory of Electromagnetic Radiation by Inertially Moving Conductive Bodies J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
S. O. GladkovIt is shown that under the conditions of inertial motion of conducting bodies, electromagnetic fields arise around them. In the example of an unevenly moving metal ball, the intensity and power of electromagnetic radiation arising at the moments of deceleration and acceleration are calculated. It is proven that a similar effect is also caused by the movement of conducting bodies along a curvilinear

Conditions for the Existence of Resonant Anisotropic Dielectric Structures J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
A. B. SamokhinIt is proven that under certain conditions, in a limited dielectric medium without losses, there exist nonzero solutions to the homogeneous problem. If the medium is anisotropic, then in the region of inhomogeneity there can be electromagnetic energy and, at the same time, there is no radiation into the surrounding space.

Nonlinear Interaction of Terahertz Waves with Nanostructured Graphene in Resonance Multilayer Plasmon Structures J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
A. M. Lerer, G. S. Makeeva, V. V. CherepanovAbstract A numerical–analytical method is developed for mathematical simulation of nonlinear effects in multilayer plasmonic structures (PSs) based on nanostructured graphene. A nonlinear effect of the thirdharmonic generation in multilayer PSs based on 2D periodic lattices of rectangular graphene microribbons on dielectric layers is numerically simulated in the terahertz frequency range. It is shown

Regularities of the Generation of Plane Fields on Matrix Radar Complexes with Ring Antenna Arrays J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
E. S. Emel’yanovAbstract Regularities of generation of a plane field are obtained versus size of working area and number of testing fields. It is shown that a minimum number of elements in equidistant ring antenna arrays that make it possible to generate a plane field in the working area can be determined for the given size of the working area.

HighDimensional Dataset Entropy Estimation via Lossy Compression J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
I. D. Butakov, S. V. Malanchuk, A. M. Neopryatnaya, A. D. Tolmachev, K. V. Andreev, S. A. Kruglik, E. A. Marshakov, A. A. FrolovAbstract This paper proposes a method for estimating a highdimensional dataset entropy based on compression via autoencoder. We give theoretical proof of such estimation relevance and illustrate it by experiments with synthetic data and the MNIST digits dataset.

Plasmon Resonances in a Convex–Concave Silver Nanocylinder J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
A. P. AnyutinThe paper considers a twodimensional problem of diffraction of a plane electromagnetic TMtype wave on a cylindrical silver nanostructure the crosssectional contour of which is a convex–concave curve (Cassini oval). In the light wavelength range \(300\,\,{\text{nm}} < \lambda < 900\,\,{\text{nm}}\) the spectra of the scattering diameter and the scattering diagrams were calculated by a rigorous numerical

Methodology and Models for Physical Simulation of Electromagnetic Interference on the Example of the InterferenceResistance Analysis of Vehicle Electronic Devices J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
Z. M. Gizatullin, R. M. Gizatullin, M. G. NurievAbstract In this paper, we propose a methodology and models for physical modeling of electromagnetic interference using the example of the interferenceresistance analysis of vehicle electronic devices under a powerful electromagnetic effect of the contact network of electric transport. Physical models and an experimental stand for physical modeling of electromagnetic interference in a communication

ContourConstrained Image Smoothing Preserving Its Structure J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
P. A. ChochiaStructurepreserving image smoothing is used in solving many problems of video information processing and analysis. Most smoothing methods are based on indirect information about the characteristics of a local image area, for example, the distribution of signal values, rather than on direct data of the image spatial structure. In reality, a criterion for constraining the smoothing area should not be

Localization of the Equations of Electromagnetic Wave Propagation in Periodic Media J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
S. E. BankovAbstract Homogeneous and inhomogeneous equations of electromagnetic wave propagation in a 2D periodic medium are considered. The equations are obtained within the framework of the method of the generalized scattering matrix. It is shown that these equations derived in the initial form are weakly localized and need taking into account the interaction of the periodic medium particles, which are distant

Manifold Modeling in Machine Learning J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
E. V. Burnaev, A. V. BernsteinAbstract Predictive Modeling problems deal with highdimensional data; however, the curse of dimensionality presents an obstacle to the use of many methods for their solutions. In many applications, realworld data occupy only a very small part of highdimensional observation space whose intrinsic dimension is essentially lower than that of the space. A popular model for such data is the manifold model

Functional Dimension Reduction in Predictive Modeling J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
E. V. Burnaev, A. V. BernsteinAbstract The paper considers the problem of dimension reduction in metamodeling (predictive modeling). It is shown that to construct an exact metamodel based on reduced data, it is necessary to solve the problem of dimension reduction in a nonstandard formulation with due account of the additional functional constraints. To construct a tangent affine linear subspace from the data, which is required

Suppression of the Side Lobe Level in the Model Problem on Radiation of an Antenna Array with Given Partial Diagrams J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
K. I. Konov, K. N. KlimovAbstract A method for reducing the side lobe level (SLL) of the combination factor (CF) of a linear equidistant phased array antenna (LEPAA) in a given direction within the framework of the model problem with given partial diagrams is presented. We obtained analytical dependences of the amplitude distribution (AD) and phase distribution (PD) of the signal at the inputs of the LEPAA emitters on the

On the Concatenated Code Constructions for Slotted Multiuser Communication Channel J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
F. I. Ivanov, S. A. KruglikAbstract In this paper we investigate a multiuser vectordisjunctive channel where users transmit binary vectors of length \(L\). Previously the capacity of this channel was estimated and it was shown that there are some cases when it achieves on nonuniform input distributions. This fact motivates us to investigate concatenated code constructions that allow us to reach target input distribution and

Simulation of Waveguides in Electromagnetic Crystal with Lumped Elements J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
E. V. Frolova, S. E. Bankov, V. I. KalinichevAbstract Eigenmodes of waveguide EBG channels in an electromagnetic crystal that represents a 2D periodic array of metal cylinders with gaps containing lumped elements (LEs) are studied. The array of cylinders with LEs is installed between the screens of a planar waveguide. Control of propagation characteristics of the fundamental mode using variations in the LE capacitance in the cylinders inside

Classification of Breast Abnormalities Using a Deep Convolutional Neural Network and Transfer Learning J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
A. N. Ruchai, V. I. Kober, K. A. Dorofeev, V. N. Karnaukhov, M. G. MozerovA new algorithm for classification of breast pathologies in digital mammography using a convolutional neural network and transfer learning is proposed. The following pretrained neural networks were chosen: MobileNetV2, InceptionResNetV2, Xception, and ResNetV2. All mammographic images were preprocessed to improve classification reliability. Transfer training was carried out using additional data augmentation

A Study on the Impact of OutofBand Emissions on Performance of 5G New RadioUnlicensed (NRU) Networks J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
V. D. Zhdanovskiy, V. A. Loginov, A. I. LyakhovNew RadioUnlicensed (NRU) is a technology that allows fifth generation mobile networks to utilize unlicensed frequency bands, in particular, the 5 GHz band. To increase throughput, an NRU base station (gNB) can simultaneously operate in several frequency channels within the 5 GHz band. However, the gNB cannot always transmit data through one channel and, at the same time, perform the channel access

New Policy for Routing Jobs to Unobservable Parallel Queues with FIFO Scheduling J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
M. G. Konovalov, R. V. RazumchikIn this paper, we present the first results of an experimental study of a new dispatching strategy in unobservable queuing systems with parallel service. The main distinguishing feature of the considered system is the impossibility of observing its dynamic characteristics. A set of numerical examples covering various options for the input job stream, various length distributions of jobs, as well as

SuperResolution of Radar and Radio Holography Systems Based on a MIMO Retrodirective Antenna Array J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210618
V. I. Kalinin, V. V. Chapursky, V. A. CherepeninAbstract— The systems of shortrange radiolocation and multistatic radio holography based on multielement MIMO antenna arrays (AAs) with recirculation of orthogonal signals in the spatial feedback circuits of AA transmitting element–target–AA receiving element–AA transmitting element are investigated. The generalized ambiguity function in spatial coordinates for an ensemble of coherent orthogonal

Distributed Coupling of EBGWaveguides with a Sparse Lattice of Coupling Elements J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210602
S. E. Bankov, V. I. KalinichevEigenwaves in the structure of coupled EBG waveguides with a sparse lattice of coupling elements, as well as characteristics of directional couplers based on them, are investigated. The propagation constants of even and odd waves in a system of two coupled triple waveguides the common wall of which is a sparse lattice of metal cylinders with a period twice the period of the crystal. It is shown that

Rotating Electrode in ElectricField Sensor J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210602
V. G. MaksimenkoAbstract It is shown that the application of rotating electrodes in an electrode sensor for measurement of the extremelylowfrequency electric field in seawater makes it possible to increase the sensitivity by more than an order of magnitude due to a decrease in the specific electrode noise of motion.

Multiple Access in Relative Information Transmission Systems with Chaotic Radio Pulses J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210602
A. S. Dmitriev, T. I. MokhseniAbstract In this paper, we show the possibility of organizing multiuser access based on a relative transmission scheme using chaotic radio pulses as a data carrier. The maximal number of subscribers and information capacity of a multiuser system are theoretically estimated. The validity of the obtained theoretical results was confirmed by computer modeling.

PureCubic Optical Soliton Perturbation with Complex Ginzburg–Landau Equation Having a Dozen Nonlinear Refractive Index Structures J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210602
Elsayed M. E. Zayed, Mohamed E. M. Alngar, Anjan Biswas, Mehmet Ekici, Salam Khan, Ali Saleh AlshomraniAbstract This paper recovers soliton solutions to perturbed pure–cubic complex Ginzburg–Landau equation having a dozen forms of nonlinear refractive index. Two integration schemes, namely the new mapping method and the addendum to Kudryashov’s approach have made this retrieval possible. Bright, dark and singular soliton solutions are recovered and enumerated for every nonlinear form. As a byproduct

New Class of Topological Textural Multifractal Descriptors and Their Application for Processing LowContrast Radar and Optical Images J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210602
A. A. Potapov, V. A. Kuznetsov, A. N. PototskiiAbstract The issues of joint estimation of the scaling, singular, multifractal, and anisotropic properties of image texture are considered. A technique for forming a fundamentally new class of topological texturalmultifractal descriptors for joint estimation of various fractal properties of a texture is described. The efficiency of segmentation of real radar and optical images by the Fuzzy cmeans

Structure of a Nuclear Magnetic Resonance Signal in a Small Relaxometer J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210602
R. V. Davydov, V. I. Dudkin, D. I. Nikolaev, V. V. Davydov, S. S. Makeev, A. V. MorozA model is proposed for describing the line shape of absorption and dispersion signals from which a recorded signal of nuclear magnetic resonance (NMR) is formed in a weak field. The expediency of using spectral analysis to determine the contributions of absorption and dispersion signals to the recorded NMR signal has been substantiated using a modulation technique. A new method is proposed for determining

The Solution of the Problem of Scattering by a Body of Revolution with a Generatrix Having a Piecewise Analytical Shape by the Hybrid Method. The Axial Incidence J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210602
V. A. Kaloshin, D. T. LuuAbstract The problem of scattering of a plane electromagnetic wave incident on a circular perfectly conducting cylinder along its axis is considered. The cylinder is bounded by halfspheres on the ends. The hybrid method is used for the solution of the problem. This method combines the method of eigenfunctions, the method of successive diffractions, and the equivalence principle. The results of calculation

Study of the Transformation of Gallium Arsenide Surface Layers under the Action of Light by Means of Surface Acoustic Waves J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210602
T. A. Bryantseva, I. A. Markov, Yu. A. TenAbstract Changes in the state of the surface layer of semiinsulating (111) GaAs in air under the action of white light are studied using surface acoustic waves (SAWs). It is shown that, depending on the light intensity and the SAW power, the reactions of interaction with molecules, atoms, and charged particles of the air are enhanced or weakened. The role of standing acoustic waves arising in the

Class of Optimal Polynomial Window Functions for Spectral Analysis of Signals J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210602
G. V. Zaitsev, A. D. KhzmalyanAbstract The problem of synthesis of loworder polynomial window functions with an arbitrarily specified decay rate of spectral lobes (optimal with respect to minimization of the maximum side lobe on a specified segment of the frequency axis) is solved. A method for the synthesis of optimal functions with verification of the solution is developed. The window functions of orders 1–12 with sidelobe

Differential Equations for Trigger and Multivibrator J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210602
A. E. KitaevAbstract Differential equations are derived for a symmetric transistor trigger and multivibrator. It is shown that the equations can be derived using the author’s expression for the current characteristic of a commonemitter transistor amplifier based on the Lambert W function (in spite of the fact that the equations can be formulated using different characteristics). The equilibrium state for the

Ion Fountain Mode for Plane Diodes with a NonZero Field in the Ion Reflection Plane J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210602
M. A. Zavyalov, T. M. Sapronova, P. M. Stalkov, V. A. SyrovoiThe effect of electron current amplification in planar unipolar and bipolar diodes during ion injection from the side of a permeable and heated cathode (“ion fountain” mode) in the general case of a nonzero electric field in the plane of ion reflection and at the anode is investigated. For electrons emitted by the cathode, the entire range of possible situations is considered, ranging from nonrelativistic

Polarizability of a Thin Cylindrical Resistive Dipole in a Quasistatic Field J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210602
V. I. Ponomarenko, I. M. LagunovThe problem of polarizability of a cylindrical resistive dipole in a quasistatic field is solved taking into account the skin effect. For the case of a weak skin effect, it is shown that the polarizability of the dipole differs significantly from the polarizability of an ellipsoid comparable to the dipole. Calculations of the effective dielectric constant of composites with cylindrical and ellipsoidal

SinglePosition Passive Location and Navigation with Allowance for the Evolution of the Radio Signal Period at the Reception Point J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210602
Yu. G. Bulychev, A. A. Mozol’Abstract In this paper, we develop a singleposition method of passive location and navigation with allowance for the periodicity of the radiated radio signal (the period may not be known) when one of the objects in the radiation source–observer pair is stationary and the second moves along a piecewise linear trajectory with an unknown velocity. The measured parameter is the time difference between

Superconducting Structures for Study and Phase Synchronization of Integrated Terahertz Oscillators J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
P. N. Dmitriev, A. B. Ermakov, N. V. Kinev, O. S. Kiselev, L. V. Filippenko, M. Yu. Fominskii, V. P. KosheletsAbstract Superconducting integrated circuits based on highquality Nb–AlOx–Nb and Nb–AlN–NbN tunnel junctions, including a harmonic mixer with a high harmonic number, have been developed, optimized, and investigated. Details of the design, manufacturing methods, and specificities of operation of superconducting elements and circuits for the detection and study of terahertz radiation from cryogenic

Coupled EBG Waveguides J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
S. E. Bankov, V. I. Kalinichev, E. V. FrolovaAbstract Characteristics of eigenwaves of two coupled EBG waveguides in an electromagnetic crystal are studied. Two variants of distributed coupling using an array of cylinders that are thinner than the crystal cylinders and an array of capacitive cylinders with gaps between the ends of cylinders and a screen are considered. It is shown that an additional even mode that emerges in the second variant

The SelfConsistent Problem of Oscillations and Waves Associated with Sources J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
A. S. Raevskii, S. B. Raevskii, A. Yu. Sedakov, A. A. TitarenkoAbstract It is shown that the source function on the righthand side of the Helmholtz equation, which is a solution of a homogeneous boundary value problem for this equation, provides the excitation of an associated wave (oscillation). Since this wave (oscillation) exists only in the presence of a source of the specified type, it is proposed to classify them (wave and oscillation) as associated with

The Method for the Constructive Synthesis of Planar Antenna Arrays with Consideration of the Interelement Coupling J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
S. E. Mishchenko, V. V. Shatskii, A. V. Litvinov, D. Yu. EliseevAbstract The method for the constructive synthesis of planar antenna arrays (AAs) based on the neural network approach with consideration of interelement coupling is proposed. Within the AA mathematical model, it is assumed that when substantiating the AA configuration, antenna elements can be divided into groups of active, unused, or passive elements with the currents induced by neighbor elements

Resonance Changes of Nonuniformity of Electromagnetic Field in an Artificial Crystal with Ferromagnetic Particles J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
A. B. Rinkevich, D. V. PerovAbstract Experimental data on transmission and reflection of millimeterwavelength electromagnetic radiation for an artificial crystal are used to estimate nonuniformity of electromagnetic field inside the crystal and dependence of nonuniformity on magnetic field. Nanocomposite materials based on opal matrices with periodically spaced ferrimagnetic nickel–zinc ferrite spinel particles or ferromagnetic

Generalized Formula for Effective Dielectric Permeability of the Medium with Ellipsoidal Inclusions J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
V. I. Ponomarenko, I. M. LagunovA composite material based on identically oriented ellipsoidal inclusions distributed in a bonding medium is considered. The concept of the field acting in the composite and the effective dielectric constant is introduced. A formula for the effective dielectric constant of the composite is obtained, which in particular cases transforms into the wellknown formulas of Lorentz and Lorentz, Maxwell Garnett

Frequency Control of a Resonant Radio Absorber with a Free Space J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
Yu. N. Kazantsev, V. A. Babayan, N. E. Kazantseva, G. A. Kraftmakher, V. P. Maltsev, V. S. SolosinAbstract—Numerical calculations of the matching of a resonant radio absorber (RA) have confirmed that the ideal matching of such an RA with free space can be realized using practically any dielectrics with losses at any desired frequency. The conditions are considered that provide the widest matching band of the RA, and it is shown that the ratio of the bandwidth to the RA thickness (bandwidth to thickness

Theoretical and Experimental Study of the Electrodynamic Properties of Microwave Planar Slot Antennas J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
E. I. Nefedov, V. P. Zayarnyi, I. N. PonomarevAbstract Mathematical models are developed for planar symmetric slot antennas (SAs) with constant slot width using a tensor Green function that takes into account both principal and crosspolarization components in the farfield zone. It is shown that such models can be employed in the study of the electrodynamic properties of SAs with different configurations of slots (linear, exponentially increasing

Structure of an Electric Field at the Cathode Edge under ρMode Emission J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
V. A. SyrovoiAbstract The structure of an electric field at the cathode edge under emission in the ρ mode in an applied inhomogeneous magnetic field is investigated in the framework of the theory of antiparaxial expansions for a relativistic ribbon beam. Shapes of the lateral surface of a cathode and the negative equipotentials are described, which make it possible to form a profiled expansion gap that does not

Electromagnetic Radiation under Spin Injection in a Tunnel Magnetic Junction with a NiO Spacer J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
E. A. Vilkov, S. G. Chigarev, I. V. Malikov, A. V. Chernykh, S. N. MaryshevAbstract The operation of a spininjection emitter of electromagnetic oscillations with a Ni/NiO/Fe magnetic tunnel junction was first investigated. Using a nonconducting NiO spacer in a magnetic junction, the effect of the potential difference at the interface between magnetic layers on the efficiency of spininjection emitters is determined. A model of the investigated emitter is theoretically described

The Solution of the Problem of Scattering by a Semitransparent HalfPlane Using the Malyuzhinets Method J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
K. Klionovski, S. E. BankovAbstract The rigorous solution of the problem of scattering of a plane electromagnetic wave by the semitransparent halfplane is presented. The solution is obtained using the method of the Sommerfeld—Malyuzhinets integral for two polarizations of the incident field. The analytical representation of the cylindrical wave scattered by the edge of the semitransparent halfplane is obtained with the use

Influence of Layering of the Lithosphere on Excitation of Extremely LowFrequency Electromagnetic Waves by a Horizontal Dipole J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
E. D. Tereshchenko, P. E. TereshchenkoAbstract—An analytical solution is obtained for the problem of excitation of electromagnetic waves by a horizontal dipole located at the interface between vacuum and a conducting twolayer medium, based on the smallness of the wavelength in a conducting medium compared to vacuum. Numerical calculations have been carried out, which made it possible to evaluate the effectiveness of this approach and

Algorithm for Generating ExtraLong Gordon–Mills–Welch Sequences J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
V. G. StarodubtsevThe modification of an algorithm for determining polynomial multipliers hci(x) of test polynomial hGMWS(x), which is the main component of the method for synthesizing Gordon–Mills–Welch sequences (GMWSs), is set as a basis for developing the software implementation of the algorithm for generating extralong GMWSs having a twolevel periodic autocorrelation function and high structural latency and generated

On the Resistorless Realization of Simulated Tunable Floating Lossy Inductors with Voltage Differencing Buffered Amplifiers J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
T. Pukkalanun, P. Moonmuang, W. TangsriratAbstract Alternative circuit designs concerning the simulation of floating lossy inductors using voltage differencing buffered amplifiers (VDBAs) are described. The topologies proposed here require only three VDBAs and one capacitor to simulate a floating inductance with series and parallel resistance. The simulated equivalent elements, namely equivalent resistance (Req) and equivalent inductance (Leq)

Remote Reconstruction of the Radiation Pattern of Phased Array Antennas J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210430
V. I. Gusevskii, M. D. Duplenkova, O. N. TsvetkovaAbstract Reliability of multielement antenna devices and the problems of distortions under conditions for unrepeatability, construction of algorithms for remote control, and correction of antenna characteristics of multielement antennas are considered. A new approach is proposed for the development of an algorithm for reconstruction of original (specified) radiation patterns within planar apertures

Dependence of the Spatial Resolution of a Matrix Photodetector Based on Indium Antimonide on the Thickness of the Photosensitive Layer J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210413
K. O. Boltar, P. V. Vlasov, P. S. Lazarev, A. A. Lopukhin, V. F. ChishkoAbstract The photoelectric interconnection of matrix photodetectors in the mediumwave IR range of 320 × 256 elements with a step of 30 μm and 640 × 512 elements with a step of 15 μm based on indium antimonide is investigated. The dependence of the crosstalk value on the thickness of a thinned InSb bulk structure was determined. The interrelation of the elements of matrix photodetectors based on epitaxial

Investigation of the Depth and Rate of Ion Etching of QWIP Structures J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210413
A. V. Trukhachev, M. V. Sednev, N. S. Trukhacheva, K. O. Boltar, A. I. DirochkaAbstract In this study we investigated the dependences of the rate of ionbeam etching of the upper contact layer (GaAs:Si), an active region consisting of a 50fold alternation of barrier layers (AlxGa1–xAs) and quantum wells (GaAs:Si) and the lower contact layer (GaAs:Si) along the depth of QWIP structures based on GaAs–AlGaAs, fabricated by molecular beam epitaxy (MBE), in order to determine the

Anodic Passivation of InSb(100) by Sodium Sulfide Solution with Additional Sulfidization Pretreatment J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210413
A. E. Mirofianchenko, E. V. Mirofianchenko, N. A. Lavrentyev, V. S. PopovAbstract The MISstructures of InSb with anodically grown dielectric coating in galvanostatic mode in sodium sulfide solution were studied. Fast and slow surface states extracted by using the C–V characteristics method. The extracted values of Dit and NF were 2 × 1011 cm–2 eV–1 and 9.2 × 1010 cm–2, respectively. The hysteresis behavior was investigated. Additional sulfidation pretreatment using (NH4)2S–ethylenglycol

Electroluminescent Panel Based Optical Radiation Sensor J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210413
A. M. Kabyshev, M. P. Maslakov, V. V. Urumov, I. N. GoncharovAbstract The possibility of using electroluminescent panels as sensors for optical radiation is considered. The presence of a photodielectric effect was noted in them. Oscillograms of the current and voltage of the electroluminescent panel are shown. The dependences of the electric capacity of electroluminescent panels on the level of external illumination are obtained. A block diagram of a system

Fixed Beam Broadband Leaky Wave Antenna J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210413
V. A. Kaloshin, K. T. NguyenAbstract A linear leakywave antenna with a fixed beam, containing a waveguide with a semitransparent narrow wall made of metal cylinders and a prism with constrained refraction of 15 metal waveguides, is proposed and studied using numerical simulations based on the finite element method in the Ansys HFSS software product. A compact threechannel waveguide power divider in the Eplane is proposed and

Investigation of the Differential Resistance of MIS Structures Based on n Hg 0.78 Cd 0.22 Te with NearSurface GradedGap Layers J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210413
A. V. Voitsekhovskii, N. A. Kulchitskii, S. N. Nesmelov, S. M. Dzyadukh, V. S. Varavin, S. A. Dvoretskii, N. N. Mikhailov, M. V. Yakushev, G. Yu. SidorovAbstract— The admittance of MIS structures based on n(p)Hg1–xCdxTe (x = 0.21–0.23) grown by molecularbeam epitaxy on Si and GaAs substrates is studied. The possibility of increasing the value of the product of the differential resistance of the space charge region and area of the field electrode RSCRA by creating nearsurface gradedgap layers with an increased content of CdTe is investigated. It

Plasmon Resonances in Circular and Elliptic Nanocylinders Made of Premium Metals J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210413
A. P. AnyutinAbstact —A twodimensional problem of the diffraction of a plane electromagnetic wave of the TM type by a cylindrical nanostructure made of silver or gold, the crosssectional contour of which is a circle or an ellipse with a different ratio of the semiaxes, is considered. In the wavelength range \(300\,\,{\text{nm}} < \lambda < 900\,\,{\text{nm}}\) the spectra of the scattering diameter and scattering

Scattering Properties of an Optical Fiber with a Silica LightConducting Core and a LightReflecting Shell Fabricated from a Fluorinated Thermoplastic Polymer J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210413
A. A. Makovetskii, A. A. Zamyatin, D. V. RyahovskiyAbstract The scattering properties of an optical fiber with a silica lightconducting core and a lightreflecting shell made of a fluorinated thermoplastic copolymer of tetrafluoroethylene with Tefzel ethylene have been experimentally studied. It is established that when radiation (λ = 532 nm) propagates along this fiber, a noticeable scattering of the evanescent part of the wave propagating along

Miller’s Relation for the Multiplication Factor of Photocarriers in Classical Avalanche Heterophotodiodes with Separated Absorption and Multiplication Regions J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210413
V. A. Kholodnov, I. D. Burlakov, A. K. IlyasovAbstract In this paper, we derive an analytical expression for the multiplication factor of photocarriers in avalanche heterophotodiodes with separated absorption and multiplication regions. The multiplication factor is presented in the traditional Miller form. The dependence of this factor on the applied bias voltage and heterostructure parameters is analyzed.

Numerical Analysis of XRay Diffraction Reflection Spectra of AlGaAs/GaAs Superlattices Depending on Structural Parameters J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210413
D. V. Ilinov, A. D. Shabrin, A. E. Goncharov, D. A. PashkeevAbstract In this paper, we study the properties of Xray diffraction reflection spectra of multilayer periodic AlGaAs/GaAs heterostructures depending on the thickness and composition of the layer material and number of periods. The number and intensity of additional diffraction maxima on the rocking curves are shown to increase with an increase in the layer thickness and number of periods. The layer

The Study of Dark Currents in HgCdTe Heterostructure Photodiodes J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210413
N. I. IakovlevaAbstract Dark current is the main factor that influences photodiode performance. It should be minimal to reduce noise and ensure a high level of photoelectric parameters. In order to identify the predominant causes of generation–recombination in photodiodes based on a mercury–cadmium–tellurium (MCT) ternary compound in the given voltage range, a calculation model is proposed for dark currents caused

Optimized Extreme Learning Machine for Intelligent Spectrum Sensing in 5G systems J. Commun. Technol. Electron. (IF 0.483) Pub Date : 20210413
P. Kansal, A. Kumar, M. GangadharappaAbstract A twolevel learned distributed networking (LDN) structure that uses existing machine learning (ML) algorithms and the novel Optimized Extreme Learning Machine (OELM) algorithm to perform intelligent spectrum sensing for 5G systems has been proposed and implemented. This novel technique uses input vectors like received signal strength indicator, the distance between Cognitive Radio users and