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时域等效边缘电流方法计算平板的瞬态散射 被引量:1

A time-domain equivalent edge current method applied to transient scattering analysis of a flat plate
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摘要 通过对频域等效边缘电流的表达式进行傅里叶逆变换,可得到时域等效边缘电流的表达式,并将其应用于瞬态散射的分析.通过对入射场和边缘处绕射系数的路径积分得到时域绕射场,其在绕射线的焦散区是有限的.将平板瞬态散射的时域等效边缘电流和时域有限差分结果进行比较,结果相符. The time-domain equivalent edge current (TD-EEC) method is derived from the Fourier inversion of the frequency domain equivalent edge current expression and applied to the transient scattering analysis. The time-domain diffracted fields are expressed in terms of a contour integral along the edge for an arbitrary input pulse and angular coefficients, thereby yielding finite results at the caustics of diffracted rays. The results for a perfectly conducting flat plate computed by TD-EEC are compared with FDTD results for back scattering and RCS in a wide band. The two results are in excellent agreement while the multiple diffraction between edges is not included. The multiple diffraction evaluated by TD-EEC will be studied in the future.
出处 《西安电子科技大学学报》 EI CAS CSCD 北大核心 2004年第3期329-333,共5页 Journal of Xidian University
基金 国家自然科学基金资助项目(60371018)
关键词 时域等效边缘电流 电磁瞬态散射 高频技术 time-domain equivalent edge current method electromagnetic transient scattering high-frequency techniques
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