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粗糙海面及其上方导体目标复合电磁散射的混合算法研究
  • 期刊名称：物理学报, 57(6)，pp.3473-3480, 2008.
  • 时间：0
  • 分类：O441[理学—电磁学;理学—物理]
  • 作者机构：[1]西安电子科技大学理学院,西安710071
  • 相关基金：国家自然科学基金（批准号：60571058）和高等学校博士学科点专项科研基金（批准号：20070701010）资助的课题
  • 相关项目：实际海背景中目标的复合电磁散射与预报模型研究
关键词： 粗糙海面, 电磁散射, 混合算法, 矩量法, rough sea surface, electromagnetic scattering, hybrid method, method of moment
中文摘要：

利用基于电流计算的矩量法结合高频算法基尔霍夫近似的混合算法,分析了一维PM谱粗糙海面及其上方二维无限长任意截面导体目标的双站复合电磁散射特性.混合算法将粗糙面和目标分别划分到KA区域和MOM区域,由于无需数值求解粗糙海面区域的表面极化电流,该算法的运算时间和对计算机内存的需求主要取决于粗糙面上方目标的网格划分情况.数值结果以无限长导体圆柱为例计算了其与一维下垫PM谱粗糙海面的复合双站散射截面,并将计算结果与经典MOM结果进行了比对和验证,结果表明混合方法具有较高的计算效率.最后应用混合方法讨论了不同极化状态、海上不同风速以及目标不同尺寸和位置对复合散射截面的影响.

英文摘要：

A current based hybrid method combining the MOM with the Kirchhoff approximation for analysis of scattering interaction between a two-dimensional infinitely long conducting target with arbitrary cross section and a 1-D rough sea surface with PM spectrum is proposed. The electromagnetic scattering region in the hybrid method is split into KA region and MOM region,respectively. The computational time of the hybrid method mainly depends on the number of unknowns of the target due to the induced current on the rough sea surface does not need to be calculated. The composite bistatic scattering cross section for the infinitely long cylinder above the rough sea surface with PM spectrum is calculated,the numerical results are compared and verified with those obtained by the conventional MOM,which shows the high efficiency of the hybrid method. Finally,the influence of the windspeed,the size and location of the target on the bistatic scattering cross section with different polarizations is discussed in detail.

同期刊论文项目
实际海背景中目标的复合电磁散射与预报模型研究
期刊论文 71 会议论文 19 获奖 1
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