基于时域混合场积分方程求解目标瞬态散射特性  

The Solution of Time-Domain Combined Field Integral Equation for Transient Scattering by Conducting Surfaces of Arbitrary Shape

作　　者：任猛[1] 周东明[1] 刘锋[1] 何建国[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《电子与信息学报》2008年第2期494-497,共4页Journal of Electronics & Information Technology

摘　　要：当入射平面波的频谱包含目标的谐振频点时,时域电场积分方程和时域磁场积分方程求解的表面电流不稳定,会出现后期震荡现象。通过线性组合时域电场积分方程和时域磁场积分方程,可以获得一种混合场积分方程。数值结果显示,这种混合场积分方程消除了因内部谐振引起的后期震荡,得到了稳定的表面电流分布和远区散射场。The time-domain EFIE and MFIE approaches produce late-time oscillation for transient scattering responses from conducting objects when the incident spectrum of the field contains frequency components, which may correspond to the internal resonance of the structure. A time-domain Combined Field Integral Equation （CFIE） is presented. This formulation is based on a linear combination of the time-domain EFIE with MFIE. Numerical results for the EFIE, MFIE, and CFIE axe presented and compared with those obtained from the Inverse Discrete Fourier Transform （IDFT） of the frequency-domain CFIE solution. And the time-domain CFIE solutions devoid of any resonant components.

关 键 词：时域混合场积分方程 瞬态特性 内部谐振 后期震荡 

分 类 号：O441[理学—电磁学]