Electromagnetic scattering property simulating method based on cylindrical surface equivalent source domain decomposition

Abstract

The invention discloses an electromagnetic scattering property simulating method based on cylindrical surface equivalent source domain decomposition. The method comprises the following steps of: establishing a model, dividing sub-regions and dissecting; opening electromagnetic current on each sub equivalent cylindrical surface and each sub scatterer, and determining the basic function coefficient of the equivalent incident electromagnetic current on each sub equivalent cylindrical surface; converting the basic function coefficient of the equivalent incident electromagnetic current on the sub equivalent cylindrical surface of a non-rotational symmetrical body into an RWG (Vector Triangle Basis Function) coefficient; determining an incident electric field generated on the surface of the corresponding sub scatterer by the equivalent incident electromagnetic current on each sub equivalent cylindrical surface, and determining scattering current on the surface of the sub scatterer in each sub-region; determining the scattering electromagnetic current on each sub equivalent cylindrical surface, taking the scattering electromagnetic current as the incident current of any other sub-region, and updating the scattering electromagnetic current coefficient on each sub equivalent cylindrical surface until the scattering electromagnetic current coefficient is balanced; and determining the radar scattering sectional area of a far field to finish the electromagnetic scattering property simulation. The invention provides a stable and efficient electromagnetic simulating method suitable for metal targets with any shapes.

Description

Technical field [0001] The invention relates to the technical field of electromagnetic simulation, in particular to a simulation method of electromagnetic scattering characteristics based on cylindrical equivalent source domain decomposition. Background technique [0002] A rotationally symmetric body refers to a three-dimensional object that is rotationally symmetric about an axis. Due to its structural characteristics, it can be expanded by a local global basis function, and the rotationally symmetric body moment method is used for rapid analysis and calculation (M.Andreasen, "Scattering from bodies of revolution, "Antennas and Propagation, IEEE Transactions on, vol. 13, pp. 303-310, 1965.), compared with the traditional method of moments based on RWG basis functions (Rao, SM; Wilton, D.; Glisson, AW, Electromagnetic scattering by surfaces of arbitrary shape, "Antennas and Propagation, IEEE Transactions on, vol. 30, no. 3, pp. 409, 418, May1982) greatly saves computing resource...

AI Technical Summary

Problems solved by technology

W.-D.Li, W.Hong, and H.-X.Zhou proposed an overlapping domain decomposition method for integral equations (W.-D.Li, W.Hong, and H.-X.Zhou, "Integral equation-based overlapped domain decomposition method for the analysis of electromagnetic scattering of 3D conducting objects,” Microwave and Optical Technology Letters, vol.49, no.2, pp.265-274, 2007.), M.K.Li, and W.C.Chew proposed Domain decomposition method based on equivalence principle (M.K.Li, and W.C.Chew, "Wave-Field Interaction With Complex Structures Using Equivalence Principle Algorithm," Antennas and Propagation, IEEE Transactions on, vol.55, no.1, pp.130- 138,200

Images