电磁波在均匀磁化等离子体中的衰减与反射

Attenuation and Reflection of Electromagnetic Wave in Uniform Magnetized Plasma

等离子体覆盖住金属导体,通过等离子体对入射电磁波的折射、吸收,使得入射波功率衰减,降低了反射功率,起到减小目标RCS的作用.对于均匀磁化等离子体,针对介电常数与等离子体粒子密度、外加磁场强度、电子碰撞频率以及入射波频率的关系,仿真计算了不同的等离子体粒子密度、外加磁场强度、电子碰撞频率以及不同等离子体厚度在毫米波波段对电磁波的衰减和反射特性的影响.

When a metallic target is coated with plasma, the plasma will absorb and refract the incident electromagnetic wave, so as to attenuate the power of the incident wave and reduce the power of the reflected wave. Thus, the RCS of the target also will be reduced. For the uniform magnetized plasma, the permittivity has a relationship with the density of particle of plasma, the intensity of the outer magnetic field, the collision rate of electron and the frequency of the incident wave. The influence of different density, intensity, collision rate and thickness on the attenuation and reflection characteristics of electromagnetic wave in millimeter wave band can be calculated by the simulation method.