Simulation of scattering characteristics of aerial resonant-size objects in the VHF band

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

“…In this case different methods of mathematical simulation are used: FDTD method [3,4], surface integral equations (IE) [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], and also high-frequency asymptotic methods [21][22][23][24].…”

“…The methods are applied for determining the densities of surface electric current that are based on solving IE of magnetic field (MFIE) [5,6,[8][9][10][11][12][14][15][16][17][18][19], electric field (EFIE) [5, 6, 11-14, 17, 20], and also based on linear combination of these equations, i.e. combined field IE (CFIE) [5,[10][11][12]20].…”

“…In particular, a method for solving MFIE was proposed earlier in paper [15] making it possible to calculate SC of objects having simple shape and of a simplified model of cruise missile (CM) in a narrow frequency range. The transition to more realistic models of aerial objects having complex shape and the need of extending the frequency range for applying the IE method lead to a series of computational difficulties.…”

“…The application of IE method for calculating SC of complex objects involves the need of taking into account the following peculiarities [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]:…”

“…Thus, the analysis of [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] indicates that at present the universal methods for solving IE are not available. We refer here to the methods making it possible to calculate with high accuracy SC of objects containing elements, the electric sizes of which vary in wide range.…”