基于时域混合场积分方程求解目标瞬态散射特性
doi: 10.3724/SP.J.1146.2006.01100
The Solution of Time-Domain Combined Field Integral Equation for Transient Scattering by Conducting Surfaces of Arbitrary Shape
-
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。Abstract: 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 are 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.
-
Rao S M. Time Domain Electromagnetics, San Diego,Academic Press, 1999: 1-9.[2]Rao S M and Wilton D R. Transient scattering by conductingsurfaces of arbitrary shape[J].IEEE Trans. on Antennas andPropagation.1991, 39(1):56-61[3]Rao S M and Sarkar T K. Transient analysis ofelectromagnetic scattering from wire structures utilizing animplicit time-domain integral equation technique[J].Microw.Opt. Technol. Lett.1998, 17(1):66-693.0.CO;2-9' target='_blank'>[4]Jung B H and Sarkar T K. Transient scattering fromthree-dimensional conducting bodies byusing magnetic fieldintegral equation[J].J. of Electromagn. Waves and Appl.2002,16(1):111-128[5]Vechinski D A and Rao S M. A stable procedure to calculatethe transient scattering by conducting surfaces of arbitraryshape[J].IEEE Trans. on Antennas and Propagation.1992,40(6):661-665[6]Sadigh A and Arvas E. Treating instabilities inmarching-on-in-time method from a different perspective[J].IEEE Trans. on Antennas and Propagation.1993, 41(12):1695-1702[7]Rynne B P and Smith P D. Stability of time marchingalgorithoms for the electric field integral equations. J.Electromagn. Waves Appl., 1990, 12(4): 1181-1205.[8]Davies P J. A stability analysis of a time marching scheme forthe general surface electric field integral equation. Appl.Numer. Math., 1998, 27(1): 35-57.[9]Manara G, Monorchio A, and Reggiannini R. A space-timediscretization criterion for a stable time-marching solution ofthe electric field integral equation[J].IEEE Trans. on Antennasand Propagation.1997, 45(3):527-532[10]Shanker B, Erigin A A, Aygun K, and Michielssen E.Analysis of transient electromagnetic scattering from closedsurfaces using a combined field integral equation[J].IEEE Trans.on Antennas and Propagation.2000, 48(7):1064-1074[11]Jung B H and Sarkar T K. Time-domain CFIE for theanalysis of transient scattering from arbitrarily shaped 3Dconducting objects[J].Microw. Opt. Technol. Lett.2002, 34(4):289-296[12]Widan R A, Pisharody G, Weile D, Shanker B, andMichielssen E. An accurate scheme for the solution of thetime-domain integral equations of electromagnetics usinghigher order vector bases and bandlimited extrapolation[J].IEEE Trans. on Antennas and Propagation.2004, 52(11):2973-2983[13]Rao S M. Electromagnetic scattering and radiation ofarbitrarily-shaped surfaces by triangular patch modeling.[ PhD, Dissertation ], Univ. Mississippi 1980(8). -
计量
- 文章访问数: 2962
- HTML全文浏览量: 86
- PDF下载量: 668
- 被引次数: 0
下载:
