A TDIE Based Numerical Simulation Of Radar Scattering On The Three-Dimensional Conductor

In the current military detecting, the radar is an important means of detection. As a new concept, the plasma stealth technology is receiving more and more attention. The United States and Russia and other countries are carrying out in-depth research and have entered the application stage. To study the scattering electromagnetic fields in the plasma environment, and to explore specific algorithm is very necessary.The mostly used method in dispersive media for electromagnetic scattering analysis is finite-difference time-domain (FDTD). It is simple and clear, very convenient in addressing complex medium problems, but in the face of Electrically Large goals scattering problem, the calculation is excessive, besides the FDTD method itself is not very precise. On the other hand, when using the time-domain integral equation method to solve such problem, not only just the surface of scattering object is needed to be meshed for the homogeneous medium, but also a lot of unknowns will be reduced. Meanwhile, TDIE is more accurate, it does not produce dispersion error. When used with the plane-wave time-domain (PWTD) accelerating it is expected to achieve high computational efficiency and is a numerical methods worthy of in-depth study.As such, this paper presents a three-dimensional transient electromagnetic scattering using TDIE, hoping to lay the foundation of TDIE based numerical simulation applied in plasma dispersion medium in the future.This paper analyzes the significance of the status issue first. In comparing with the current common numerical methods, the advantages of TDIE based scheme solving such problems are shown. Then the integral equation time domain for the electric field, magnetic field, and the mixed field are derived, and the basis of the solution of TDIE : Moment Method is introduced.In the fourth chapter, this paper detailed analysis of how to get the discrete scattering body, how to deal with raw data, how to use space-time basis function, how to apply testing procedure and how to evaluate integral values and singular integrals. The stability of the TDIE solution is also analyzed and a new averaging method is used to resist the oscillation. The numerical results of two samples show that this method is very effective. Finally, the principle of the fast algorithm of TDIE : PWTD is briefly discussed. This approach enables TDIE to suit for complex dispersion medium such as plasma, and the computational complexity can also be reduced significantly. This is a major breakthrough for TDIE, and a new direction.