摘要
研究复杂等离子体目标电磁散射特性,需要采用高效的数值计算方法。为此,提出了一种分段线性递归卷积时域有限差分(PLRC-FDTD)算法及其在MPI+openMP并行计算模型中的高效实现方法,对不同等离子体参数和入射电磁波参数条件下等离子体覆盖金属目标的电磁散射特性进行了仿真计算。结果表明:当等离子体频率与入射波频率相近时,共振吸收占主导,反射率最低;等离子体层越厚,对电磁波的吸收越明显;对于特定参数的入射电磁波,可通过改变等离子体参数的方法来实现对电磁波的有效吸收,从而实现目标的主动隐身。
An efficient calculation method is required in studying the electromagnetic scattering characteristics of complex plasma objects. Hence, we adopted the PLRC-FDTD algorithm and its application in a parallel computing model based on MPI and openMP to calculate the electromagnetic scattering characteristics of a plasma-covered metal under the conditions of various plasma features and incident electromagnetic （EM） waves. The simulation results show that when the frequency of incident EM wave is close to the plasma＇s frequency, the plasma＇s reflectivity is the lowest and reson- ance absorption is the main mechanism of EM absorption. Moreover, the EM absorption gets stronger with thickening plasma layer. For the incident wave with specific parameters, it is possible to control the absorption of EM wave by changing the plasma parameters so as to realize the active stealth of certain targets.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2014年第7期2084-2089,共6页
High Voltage Engineering
基金
中国博士后科学基金(20110491498
2012T50880)~~
