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