ELECTROMAGNETIC SCATTERING AND DOPPLER ANALYSIS OF THREE-DIMENSIONAL BREAKING WAVE CRESTS AT LOW-GRAZING ANGLES

被引：18
作者：
Qi, C. [1 ]
Zhao, Z. [1 ]
Yang, W. [1 ]
Nie, Z. [1 ]
Chen, G. [2 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Elect Engn, Chengdu 610054, Peoples R China
[2] Chongqing Univ Posts & Telecommun, Sch Commun & Informat Engn, Chongqing 400065, Peoples R China
来源：
PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER | 2011年 / 119卷
关键词：
ROUGH-SURFACE SCATTERING; WATER-WAVES; MICROWAVE-SCATTERING; MODEL; ALGORITHM;
D O I：
10.2528/PIER11062401
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 ; 0809 ;
摘要：
The electromagnetic scattering of the synthesized three-dimensional (3-D) breaking wave crests which are formed by azimuthally aligning the individual 2-D breaking wave profiles has been numerically studied at the low-grazing angles (LGA) by using the multilevel fast multipole algorithm (MLFMA) with adaptive higher order hierarchical Legendre basis functions. Different from the specular (or quasi-specular) reflection and Bragg scattering, the "sea-spike" phenomenon which is characterized by that horizontally polarization (HH) signals greatly exceed vertically polarization (VV) signals has been demonstrated by analyzing both the backscattering of 3-D LONGTANK series and a plunging breaker. For the time-dependent evolution of the plunging breaker, the Doppler shifts and Doppler splitting effects are investigated by applying the fast Fourier transform (FFT) with a moving Hamming window. The spectrum of HH scattering has the feature of concentration, while the spectrum of VV scattering shows the Doppler splitting effects.
引用
收藏
页码：239 / 252
页数：14
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