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Nonequidistant two-dimensional antenna arrays based on magic squares

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Journal of Measurement Science and instrumentation 2017年第3期8卷 244-253页

作者： v F Kravchenko v i lutsenko i v lutsenko i v Popov LUO Yi-yang A v Mazurenko Kotel’nikov institute of Radio Engineering and Electronics of Russian Academy of Sciences Moscow 125009Russia Usikov institute of Radio Physics and Electronics of Natioanl Academy of Sciences of Ukraine Kharkiv 61085 Ukraine Zhukovsky National Aerospace University-Kharkiv Aviation institute Kharkiv 61070Ukraine

New methods of synthetizing nonequidistant sparse antenna arrays based on the properties of magic squares are *** methods of construction and algorithms of synthesis of two-dimensional antennas based on them providing a high degreeof dilution and sufficiently small side radiation are *** methods for construction of such antennas and their maincharacteristics are considered.

关键词： magic squares nonequidistant sparse antenna arrays two-dimensional antenna arrays

Description of nonstationary non-Gaussian processes using finite atomic functions

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Journal of Measurement Science and instrumentation 2017年第1期8卷 37-45页

作者： v F Kravchenko 0 v Kravchenko v i lutsenko i v lutsenko i v Popov LUO Yi-yang Kotel’nikov institute of Radio Engineering and Electronics of Russian Academy o f Sciences Moscow 125009 Russia Bauman Moscow State Technical University Moscozv 105005Russia Scientific and Technological Center of Unique instrumentation of Russian Academy of Sciences Moscow 119992 Russia Usikov institute of Radiophysics and Electronics of National Academy of Sciences o f Ukraine Kharkiv 61085 Ukraine National Aerospace University-Kharkiv Aviation institute Kharkiv 61070Ukraine

The possibility of using finite atomic functions of Kravchenko-Rvachev for description of the laws of distribution of the refractive index of the troposphere,the intensity of the scattering from the sea,seasonal behavior unit radar cross section(RCS)of land areas with vegetation covering,as well as the spectrum of electromagnetic spikes of lithospheric origin is considered.

关键词： finite atomic functions of Kravchenko-Rvachev Gaussian curves unit radar crocss section (RCS) refractive index radiation of lithospheric origin scattering from the sea diffusion equation

Sensors for control of water transparency in optical and microwave ranges

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Journal of Measurement Science and instrumentation 2018年第4期9卷 354-359页

作者： v F Kravchenko E v Krivenko v i lutsenko i v Popov Kotel’nikov institute of Radio Engineering and Electronics of Russian Academy of Sciences Moscow 125009 Russia Bauman Moscow State Technical University Moscow 105005 Russia Scientific and Technological Center of Unique instrumentation of Russian Academy of Sciences Moscow 119992 Russia Usikov institute of Radiophysics and Electronics of National Academy of Sciences of Ukraine Kharkiv 61085 Ukraine

in the face of deteriorating environmental conditions in the world,water quality control is an urgent *** can be solved by creating sensors with high accuracy and low cost,which requires the development of fundamentally new radiophysical methods that take advantage of the optical,microwave and millimeter wavelengths that have a significantly greater sensitivity to low concentrations of pollutants and a lower *** article presents prototypes of measuring cells of the microwave and optical ranges as well as the results of an experimental study of water of various degrees of pollution with their *** results show that the use of the highly sensitive method of capillary-waveguide resonance makes it possible to detect the presence of micro impurities in water with concentrations up to0.1%and to identify water even from sources of various natural *** addition,the use of measurements at several frequencies in the optical range will make it possible to solve the problem of creating water control sensors with high sensitivity to pollution and low *** can be concluded that the possibility of complex use of multiwave sensors(optical,infrared and microwave ranges)allows to increase the sensitivity and reliability of water quality assessment.

关键词： optical sensor light attenuation in the medium optical transparency capillary-waveguide resonator dielectric characteristics Q-factor and depths of resonance absorption

Nonequidistant two-dimensional antenna arrays based on Latin squares

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Journal of Measurement Science and instrumentation 2019年第1期10卷 38-48页

作者： v F Kravchenko v i lutsenko i v Popov LUO Yi-yang Kotel’nikov institute of Radio Engineering and Electronics of Russian Academy of Sciences Moscow 125009Russia Usikov institute of Radiophysics and Electronics of National Academy of Sciences of Ukraine Kharkiv 61085Ukraine v.N.Karazin Kharkiv National University Kharkiv 61022Ukraine

Non-equidistant sparse antenna arrays constructed on the basis of Latin squares are considered. A method for their construction and a synthesis algorithm are proposed,and the properties of two-dimensional antennas based on them,which ensure,at a high degree of rarefaction,a sufficiently small lateral radiation are studied. The features and main characteristics of such antennas are studied.

关键词： non-equidistant antenna array Latin square compound squares covered frequencies

Simulator of GNSS signals for testing of space objects receivers in the earth conditions

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Journal of Measurement Science and instrumentation 2018年第3期9卷 249-256页

作者： Yu Khomenko v F Kravchenko A G Laush v i lutsenko i v lutsenkoa DO Popova Limited Liability Company ＂NaviS-Ukraine＂ Cherkasy 20708Ukraine Kotel＇ nikov institute of Raclio Engineering and Electronics of Russian Acaclemy of Sciences Moscow 125009Russia Usikov institute of Raclioph ysics and Electronics of National Academy of Sciences of Ukraine Kharkiv 61085Ukraine

A technique for testing space object receivers using global navigation satellite system （GNSS） signal simulator of the navigation field is proposed. its structure consists of two blocks which allow synthesizing the scenario of reciprocal displacement of the receiver relative to navigation satellites and their signals. in the first block, according to the known coordinates of the receiver which are specified in tabular form or analytically, the distances between the receiver and the navigation satellites are calculated as well as their relative velocities. According to these data, the second block synthesizes the signals of navigational travelers with the specified characteristics which are transmitted via the air or cable with a given attenuation to the receiver. This allows testing on the earth receivers for airplanes and space objects under different scenarios of their movement, which not only reduces the risk of problems during the flight, but also avoids significant economic costs. Based on real data obtained by approaching two spacecraft using a simulator, the receiver was tested, which shows the promise of the proposed technology.

关键词： global positioning system GPS) global navigation satellite system (GLONASS) global navigation satellite system (GNSS) simulator satellite navigation systems (SNS)

Backscattering by sea of centimeter and millimeter waves at small grazing angle

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Journal of Measurement Science and instrumentation 2014年第2期5卷 36-43页

作者： v F Kravchenko v i lutsenko i v lutsenko Kotelnikov institute of Radio Engineering and Electronics of Russian Academy of Sciences Moscow 125009 Russia Usikov institute of Radiophysics anti Electronics of National Academy of Sciences of Ukraine Kharkov 61085 Ukraine

Using experimental data reflected by the sea on specific radar cross-section （SRCS） at millimeter and centimeter waves, the approximations of the wind speed, angle of the sea surface radiation and polarization of the incident field can be calculated. The simulation model of the scattered signal has been proposed on the basis of the semi-Markov nested processes. For the first time it has been proved that for the description of reflections at spikes and pauses, it is possible to use finite atomic functions. The proposed model allows us to estimate the baekscatter intensity of millimeter and centimeter radio waves by the sea at grazing angle of surface radiation, as well as to simulate scattered signal.

关键词： radar cross-section sea surface centimeter and millimeter waves semi-Markov process atomic function

Description and analysis of non-stationary signals by nested semi-Markov processes

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Journal of Measurement Science and instrumentation 2014年第3期5卷 25-32页

作者： v F Kravchenko v i lutsenko i v lutsenko D O Popov Kotel'nikov institute of Radio Engineering and Electronics of Russian Academy of Sciences Usikov institute of Radiophysics and Electronics of National Academy of Sciences of Ukraine

The possibility of describing the time-dependent processes of scattering by underlying surfaces and the clear sky, as well as the seasonal behaviour of the refractive index of troposphere by using nested semi-Markov processes has been consid- ered. Local Gaussian models can be used to describe the process inside each phase state. The possibility of describing the sta- tistics of reflections from the sea and the refractive index by using Kravchenko finite functions has been shown for the first time.

关键词： semi-Markov processes Kravchenko functions atomic functions scattered signal

Empirical model of correction for zenith tropospheric delay

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Journal of Measurement Science and instrumentation 2014年第4期5卷 20-28页

作者： v F Kravchenko v i lutsenko i v lutsenko D O Popov A G Laush v N Gudkov Kotel'nikov institute of Radio Engineering and Electronics Russian Academy of Sciences Usikov institute of Radiophysics and Electronics of National Academy of Sciences of Ukraine Co Ltd. Navis-Ukraine

The paper considers the possibility of correction of zenith tropospheric delays, and calculates it with the standard model, which takes into account the values of the refractive index of the troposphere at the time of measurement. Based on the experimental research, this empirical model of correction for zenith tropospheric delays can reduce the measurement er- ror of coordinates to about 30 % and altitude to about 40 %.

关键词： zenith tropospheric delays satellite navigation signal global positioning system (GPS) global navigation satel-lite system (GLONASS)

Three-point method of differential correction of coordinates and pseudo-range in GPS

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Journal of Measurement Science and instrumentation 2014年第1期5卷 41-45页

作者： v F Kravchenko A G Laush v i lutsenko i v lutsenko D O Popov 王建园 Kotelnikov institute of Radio Engineering and Electronics of Russian Academy of Sciences Co Ltd Navis-Ukraine Usikov institute of Radiophysics and Electronics of National Academy of Sciences of Ukraine 南京航空航天大学(NUAA) 南京210016

This paper presents the interpolation method of generating the differential correction to coordinates and *** a consequence,to improve the quality and stability of the generated correction of amendments,it is advisable to use a system of three reference *** demonstrates the advantages of the interpolation method in comparison with the standard method of differential correction.

关键词： refraction troposphere differential correction satellite navigation systems