摘要
利用更为符合海面实际散射场计算的双尺度法分析并计算了一维动态分形粗糙海面的后向散射截面 ,同时与微扰法有关结果进行了比较 .研究了动态分形海面后向散射信号的多普勒谱分形特征 ,分析了不同极化状态下后向散射截面和多普勒谱谱宽随入射角及分维的变化规律 。
In this paper, the two-scale model method, which is much applicable to the computation of the electromagnetic scattering field from the rough sea surface, is used to calculate the backscattering cross-section of the one-dimensional time-varying fractal rough sea surface, the related results are also compared with those calculated by small perturbation method. The fractal characteristic of the Doppler spectra of the backscattering signal from the sea surface is studied, the dependances of the the backscattering cross-section and the width of Doppler spectra on the incident angle and fractal dimension are also analyed. Finally, the relationship between the central frequency of the Doppler spectra and the Bragg resonant frequency is discussed in detail.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第1期96-101,共6页
Acta Physica Sinica
基金
国家自然科学基金 (批准号 :60 10 10 0 1)
高等学校优秀青年教师教学和科研奖励基金资助的课题~~