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

Abstract

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.

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

“…( ) scattered by the dielectric elements of the object V 2 in the homogeneous space V 1 is determined [24]:…”

“…currents on the surface S diel of the object V 2 can be found using the system of Muller-type integral equations (SIEM) [24]:…”

Моделювання Характеристик Радіолокаційного Розсіювання Діелектричних Гвинтів Тактичних Безпілотних Літальних Апаратів У Різних Діапазонах Хвиль

“…Аналіз останніх досліджень і публікацій. Дослідженням ХВВ гвинтів БпЛА присвячено цілий ряд робіт, зокрема [5][6][7][8][9][10][11][12][13]. У статті [8] наведено більш широкий перелік робіт з даної тематики та аналіз основних результатів у даній області.…”

Guest Editorial: Method of analytical regularisation for new frontiers of applied electromagnetics

“…An efficient numerical tool for the analysis of the radar cross sections of small to resonant size drones is presented in the paper ‘Integral equation modelling of unmanned aerial vehicle radar scattering characteristics in VHF to S frequency bands’ by Zalevsky et al. [14]. The problem is formulated in terms of the Fredholm second‐kind Magnetic Field Integral Equation and Muller Integral Equation and discretised with the aid of interpolation method.…”