同心導(dǎo)體圓盤-圓環(huán)結(jié)構(gòu)散射場的一種分析方法
A NEW APPROACH FOR SCATTERING PROBLEMS OF METALLIC DISC-RING STRUCTURES ILLUMINATED BY PLANE WAVES
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摘要: 本文從電場積分方程出發(fā),經(jīng)傅氏變換,并分離出電荷對散射場的貢獻(xiàn),導(dǎo)出了平面波投射于同心圓盤-圓環(huán)結(jié)構(gòu)時,分析散射場的一個形式簡單且便于求解的積分方程。當(dāng)平面波正投射時解法尤為簡單。據(jù)此求解圓盤和/或圓環(huán)結(jié)構(gòu)上感應(yīng)電流分布和相應(yīng)的散射場。為驗(yàn)證本方法的準(zhǔn)確性,對圓盤雷達(dá)散射截面(RCS)的計(jì)算結(jié)果與精確解進(jìn)行了比較,結(jié)果吻合很好。文中還給出了當(dāng)平面波正投射時,同心圓盤-圓環(huán)結(jié)構(gòu)上感應(yīng)電流各分量的幅度分布和散射場分布。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,阮穎錚,等譯.雷達(dá)散射截面預(yù)估、測量和減縮.北京:電子工業(yè)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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