Improvement Of The High-frequency Method And Plasma Coating Applications

With the development of the electromagnetic technology, analyzing the electromagnetic characteristic of the electrically large size targets becomes important. The rapid analysis the RCS of electrical large target has an important significance on the stealth technology and anti-stealth technology. It's very efficient to solve the RCS of electrical large target by physical optics (PO) and shooting and bouncing rays (SBR) methods, and based on high frequency method, an approach enabling accelerated shooting and bouncing rays (SBR) simulations to determine the backscattering properties of electrically large and complex objects is presented. And then, It is efficient to study near-filed RCS of scattering targets and the scattering characteristic of plasma-coated target based on the method of PO for Military development.The main work of this dissertation is as follows:Firstly, the PO and the SBR methods in high-frequency methods are introduced in detail in the paper, and Monostatic bistatic equivalence is used to accelerate PO and SBR simulations to determine the RCS of electrically large and complex objects. Secondly, the thesis introduces the concept of near-zone and far-zone, the properties of near-zone target EM scattering. Finally, as a result of the development for radar stealthy technique, the properties of plasma and the effects of the parameters of plasma on the reflection coefficient are studied. Then, the scattering fields from inhomogeneous plasma-coated targets are discussed in detail. Physics optics (PO) is applied to calculate RCS of missile coated by inhomogeneous plasma...