大气压等离子体层中微波传播的数值分析

用积分-微分波方程分析了大气压等离子体中微波的传播的一维衰减特性,用Z变换-FDTD方法描述了二维衰减特性.探讨了微波在大气压等离子体层中传播时电磁波的幅度和相移与电子密度及电子中子碰撞之间的关系.给出大气压等离子体层物理特性参数(如宽度、电子密度、碰撞频率)对传输波特性的影响.

The Numerical Solutions of the Propagation of a Microwave in an Atmospheric Pressure Plasma Layer

The propagation of a microwave in an atmospheric pressure plasma(APP)layer was described numerically with an integral differential wave equation in one dimension(normal incident)case and with the Z-transforms Finite Difference Time Domain(Z-FDTD)method in two dimension(oblique incident)case.When the microwave passes through the APP layer,its amplitude and phase of the wave electric field are obviously modulated by both the electron density and the collisions between the electrons and neutrals.The dependencies of the passed wave behaviors(i.e.the phase shift,the reflectivity,the transmissivity and absorptivity)on the APP layer characteristics(width,electron density,and collision frequency)are presented.