摘要
借助于Floquet定理和空间谐波理论对周期性角锥阵列的散射特性进行了研究,分析了散射场的形成机理,讨论了阵列边缘切断效应对散射特性的影响。采用时域有限差分(FDTD)方法和周期性边界条件对吸波材料锥体阵列和微波黑体锥体阵列的散射场进行了计算,分析了RCS和微分散射系数的空间分布随阵列结构参数、阵列表面吸波涂层参数以及入射波频率的变化关系,给出了锥体内部和口面的场分布。
The scattering characteristics of periodic pyramid array are studied by Floquet theorem and spatial harmonic theory. The formation mechanism of scattering field is analyzed, and the effect of truncation of array edge on scattering property is discussed. The scattering field of pyramid array covered with absorbing material used for microwave blackbody is calculated by FDTD method and periodic boundary condition. The variations of spatial distributions of RCS and differential scattering coefficient with parameters of array structure, covering absorbing material, and frequency of incident wave are analyzed. The field distributions within pyramid array and on array surface are given.
出处
《电波科学学报》
EI
CSCD
北大核心
2009年第3期457-462,466,共7页
Chinese Journal of Radio Science
基金
国家自然科学基金项目(No.40525015
60825101
60674010)
关键词
角锥阵列
散射
周期性结构
角锥吸波墙
微波黑体
pyramid array
scattering
periodic structure
pyramid absorbing wall
microwave blackbody
