Calculation of scattering characteristics of aerial radar objects of resonant sizes based on iterative algorithm

Zalevsky, G. S.; Sukharevsky, O. I.

doi:10.3103/s0735272714060028

Cited by 9 publications

(9 citation statements)

References 17 publications

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“…The most important component of mathematical methods for calculating the characteristics of radar scattering of objects are three-dimensional digital models of their surfaces. In the work, methods for creating models of surfaces of resonant objects of complex shape, adapted to the proposed methods for solving IE [26], were used. These methods of creating a surface model make it possible to obtain sTable results of calculations of the scattering characteristics of resonant objects of complex shape with a smaller number of elementary sections of the surface scatterer than other methods.…”

Section: Computer Sciencesmentioning

confidence: 99%

Study of the secondary characteristics of the bistatic scattering of a combined object in a covert radar surveillance system

et al. 2022

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The emergence of new means of attack, reconnaissance and methods of sabotage imposes special requirements on the technical means of protecting important state facilities (ISF). Modern trends in the construction of ISF physical protection systems are the integration of engineering barriers, perimeter signaling and detection tools. Detection tools should provide covert receipt of information about the approach of the intruder in "distant" intrigues. To do this, it is possible to use technical means built on the principle of semi-active bistatic radar with an external illumination source. However, in order to identify intruders in the ISF protection zone, it is necessary to have a priori information about the radar visibility of the combined location objects. The combined object is typically a complex object having both metallic and dielectric elements. To this end, a technique has been developed for estimating the radar cross-section (RCS) of combined objects in the field of external illumination. The electromagnetic field (EMF) scattered by a combined object in the meter and decimeter wavelength ranges is calculated as a coherent sum of fields, taking into account their phase, scattered by its metal and dielectric elements. This made it possible to take into account the electromagnetic interaction of the elements of the combined object. The method of integral equations (IE) was used to find the current density and magnetic field strength. The scatter diagrams of the person-intruder, the person-intruder in personal armor protection (PAP) under different conditions of irradiation and reception and illumination frequencies are obtained and analyzed. This made it possible to evaluate the effect of metallic elements on the scatter diagram of the combined object. The obtained a priori information is of significant practical importance at the stage of optimizing signal processing algorithms and designing new means of covert detection

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Section: Computer Sciencesmentioning

confidence: 99%

Study of the secondary characteristics of the bistatic scattering of a combined object in a covert radar surveillance system

et al. 2022

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“…where n 0 ¼ 1; :::; N is the index of the observation point. The integrals in Equation ( 26) are calculated using the compound five-point Gauss formula [20,23].…”

Section: Ie Discretisation Algorithmmentioning

confidence: 99%

“…This equation can be obtained by applying the Lorentz reciprocity theorem [19, 23] to the sought‐after field

(\overset{E}{true}, \overset{H}{true})

and the field of the auxiliary magnetic point source in the free space,

({\vec{bold-italicE}}_{1}^{m}, {\vec{bold-italicH}}_{1}^{m})

. Taking into account that the MFIE kernel has a singularity corresponding to the normal derivative of a single‐layer potential [33], the MFIE can be introduced in the following form [16, 20, 23]:

\begin{array}{l} 2 {\overset{τ}{true}}_{q}^{0} \cdot {\overset{H}{true}}^{0} ({\vec{bold-italicQ}}_{0}) - ({\overset{ν}{true}}^{0} \times {\overset{τ}{true}}_{q}^{0}) \cdot {\overset{J}{true}}^{e} ({\vec{bold-italicQ}}_{0}) (1 + I_{s_{0}} ({\vec{bold-italicQ}}_{0})) = \\ \frac{2}{i ω} \int_{S - s_{0}} {\vec{bold-italicE}}_{1}^{m} (\overset{Q}{true} | {\vec{bold-italicQ}}_{0}, {\vec{bold-italicτ}}_{q}^{0}) \cdot {\overset{⇀}{bold-italicJ}}^{e} (\vec{bold-italicQ}) d s, \end{array}

where ω is the cyclic frequency,

\vec{bold-italicQ}, {\overset{Q}{true}}_{0} \in S

are the integration and observation points, respectively,

{\overset{H}{true}}^{0}

is the magnetic vector of the incident field,

…”

Section: Basic Equationsmentioning

confidence: 99%

“…Taking into account that the MFIE kernel has a singularity corresponding to the normal derivative of a single-layer potential [33], the MFIE can be introduced in the following form [16,20,23]:…”

Section: Perfectly Electrically Conducting Elements Of Unmanned Aeria...mentioning

confidence: 99%

“…Mathematical methods allow, without significant expenditures of materials and time, the simulation of EM wave scattering from UAVs of various shapes and materials and for various radar-probing scenarios. Here, the most widely used are asymptotic high-frequency methods (AHFMs) [13][14][15][16][17][18] (in the case of electrically large scatterers) and methods based on solving boundary integral equations (IEs) [3,8,14,16,[19][20][21][22][23][24][25][26][27] (in the case of electrically small and resonant-size scatterers).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Integral equation modelling of unmanned aerial vehicle radar scattering characteristics in VHF to S frequency bands

Zalevsky

Sukharevsky

Vasylets

2021

IET Microwaves Antenna & Prop

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Methods for modelling the radar scattering characteristics of resonance-size airborne objects containing metallic and dielectric design elements are discussed. The developed algorithms are based on solving Fredholm second-kind boundary integral equations (IEs) that place them within the context of the method of analytical regularisation. The magnetic field IE is used for metal elements, and the Müller IE set is used for dielectric elements. The proposed algorithms provide important novelties in calculating the radar scattering characteristics of objects with various curvature radii, including electrically thin scatterers. The description is accompanied by an analysis of developed algorithm convergence. For the validation, a comparison of results for model object obtained by different methods is presented. The results of modelling the radar scattering characteristics of an unmanned aerial vehicle and its separate metallic and dielectric elements within the VHF and S frequency bands are demonstrated and discussed.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Radiation Characteristics of Gregorian Antennas with Resonant Size Reflectors

Sukharevskyi

Nechitaylo

Vasilets

2019

2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)

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Calculation of scattering characteristics of aerial radar objects of resonant sizes based on iterative algorithm

Cited by 9 publications

References 17 publications

Study of the secondary characteristics of the bistatic scattering of a combined object in a covert radar surveillance system

Study of the secondary characteristics of the bistatic scattering of a combined object in a covert radar surveillance system

Integral equation modelling of unmanned aerial vehicle radar scattering characteristics in VHF to S frequency bands

Radiation Characteristics of Gregorian Antennas with Resonant Size Reflectors

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