同心导体圆盘-圆环结构散射场的一种分析方法
A NEW APPROACH FOR SCATTERING PROBLEMS OF METALLIC DISC-RING STRUCTURES ILLUMINATED BY PLANE WAVES
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摘要: 本文从电场积分方程出发,经傅氏变换,并分离出电荷对散射场的贡献,导出了平面波投射于同心圆盘-圆环结构时,分析散射场的一个形式简单且便于求解的积分方程。当平面波正投射时解法尤为简单。据此求解圆盘和/或圆环结构上感应电流分布和相应的散射场。为验证本方法的准确性,对圆盘雷达散射截面(RCS)的计算结果与精确解进行了比较,结果吻合很好。文中还给出了当平面波正投射时,同心圆盘-圆环结构上感应电流各分量的幅度分布和散射场分布。Abstract: An integral equation is derived from the electric field integral equation (EFIE) for plane wave illumination onto the metallic circular disc-ring structures by using Fourier transformation and separating the induced charge s contribution from the EFIE. For normal incidence, the equation is extremely simple and easy to be solved numerically regardless of the electric dimension of the structures. Comparison between RCS by this method and that by analytical solution for a disc shows the effectiveness of this approach. Numerical results are also given for the current distribution and the far radiation patterns of a disc-ring structure.
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Mahadevan K, et al. IEEE AP Magazine, 1992, 34(1): 26-32.[2]Plonus M A,et al. IEEE Trans. on AP, 1978, AP-26(3): 488-493.[3]E. F.克拉特,等著,阮颖铮,等译.雷达散射截面预估、测量和减缩.北京:电子工业出版社,1985,第5章.[4]Hodge D B. IEEE Trans. on AP, 1980, AP-28(5): 707-712.[5]Lewin L, et al. Electromagnetic Waves and Curved Structures. Stevenge, England, PETER PE REGRIN US LTD., 1977, Chap. 2.[6]Garret J E, et al. Int. J. of IR/MMW, 1991, 12(3): 195-220. -
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