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  5. Combined method for calculation of scattering characteristics of radar objects with complex shape and its application for modeling of propeller modulation spectra of helicopters

Combined method for calculation of scattering characteristics of radar objects with complex shape and its application for modeling of propeller modulation spectra of helicopters

G.S. Zalevsky, M.M. Brechka, V.A. Vasilets, O.I. Sukharevsky
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Combined electrodynamic method for calculation of scattering characteristics of radar objects with complex shape which contain structural components of different electric sizes is considered. Developed algorithm is based on joint use of highfrequency method for calculation of scattering characteristics of electrically large structural components, and integral equation method for parts commensurable to wavelength, including electrically thin elements. Application of proposed combined method for calculation of propeller modulation spectra of helicopter in VHF band is demonstrated.
Keywords: high-frequency numerical method, integral equation, propeller modulation, secondary radiation