Near-field scattering by physical theory of diffraction and shooting and bouncing rays

被引:48
作者
Jeng, SK [1 ]
机构
[1] Natl Taiwan Univ, Dept Elect Engn, Taipei 10764, Taiwan
关键词
electromagnetic scattering; geometrical theory of diffraction; physical theory of diffraction;
D O I
10.1109/8.664120
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 [电气工程]; 0809 [电子科学与技术];
摘要
This paper will propose a method to compute the near-field RCS and Doppler spectrum of a target when the distances to antennas are comparable to the target size. By dealing with a small piece of the target surface at a time, the transmitting antenna, and the receiving antenna are in the far-field zone of the small piece of the induced currents, And the electromagnetic field produced by this small piece of induced currents can be written as a spherical wave, Sum up all spherical waves produced by every small piece of induced currents and we can obtain the total scattered field at the receiving antenna, The physical theory of diffraction (PTD) and the method of shooting and bouncing rays (SBR) are modified to evaluate the received signals, Numerical results based on these techniques are obtained and discussed, The formulation in this paper applies the simple concepts of "equivalent" image and vector effective height, which are believed to be novel.
引用
收藏
页码:551 / 558
页数:8
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