Design Of Software For Computation Of Object Scattering And Analysis Of Missile RCS

Visible software FDTD-XD2.0 based on FDTD arithmetic is a simulation electromagnetic software that can achieve FDTD modeling calculation and three-dimensional show. New methods and new techniques presented by us are applied to soft .They are showed as follows:A novel technique based on file about triangle face-units modeling is presented in this paper. To three-dimensional soft, a visible expeditious and accurate FDTD modeling technique depend on 3DS MAX is studied and applied successfully. By comparing with date, the result show that novel techniques for FDTD modeling are feasible.A novel method for computing object bistatic RCS based on FDTD method is dealt with, namely, the extrapolation result of steady state can be obtained from the FDTD computation of transient state by discrete Fourier transform. For FDTD method, the method can be used for convenience in the engineering application, and save the computing time, and improve its computational precision. The bistatic RCS of a PEC sphere and one complex object are computed, and the numerical results show that the method is feasible.By applying novel techniques and methods, the soft FDTD-XD2.0 is implemented with great.Antenna-radome is simulated accurately by the superspheroid given a specifically numerical value and the backscattering characteristics of it are analyzed in detail. Three-dimensional ZT-FDTD method based on Z transform for electromagnetic scattering by dispersive media is studied. By introducing Z transform, the constitutive relation in Z domain between D|â†' and E|â†' is derived from its frequency domain expression, the constitutive relation in Z domain is then transformed to time domain via Z transformation. Three-dimensional FDTD iterative formulation from D|â†' to E|â†' and H|â†' to D|â†' in time domain can be obtained. The electromagnetic scattering characteristic of a plasma sphere is investigated. The numerical result is in good agreement with the one by using the shift operator method, showing the feasibility of proposed technique. Z transform is used to study scattering of exhaust.