J4 ›› 2013, Vol. 40 ›› Issue (6): 132-139.doi: 10.3969/j.issn.1001-2400.2013.06.023

• 研究论文 • 上一篇    下一篇



  1. (西安电子科技大学 理学院,陕西 西安  710071)
  • 收稿日期:2012-08-26 出版日期:2013-12-20 发布日期:2014-01-10
  • 通讯作者: 郑帆
  • 作者简介:郑帆(1987-),男,西安电子科技大学硕士研究生,E-mail:zhengfan0414@126.com.
  • 基金资助:

    国家杰出青年科学基金资助项目(61225002);高等学校博士学科点专项科研基金资助项目(20100203110016);中央高校基本科研业务费资助项目(K50510070001, K5051307016)

Analysis of electromagnetic scattering from the  wind-blown barchan

ZHENG Fan;GUO Lixin;LIU Wei   

  1. (School of Science, Xidian Univ., Xi'an  710071, China)
  • Received:2012-08-26 Online:2013-12-20 Published:2014-01-10
  • Contact: ZHENG Fan


利用风积沙丘理论模拟了新月形沙丘,应用基于离散面元的基尔霍夫近似计算了电磁波分别沿单个沙丘的迎风坡、背风坡和两侧坡面入射时的电磁散射系数,比较了这4个坡面方向入射时的单、双站散射系数.数值结果表明:对于单站背风坡入射,同极化散射系数在休止角出现局部峰值; 当入射角接近休止角时,背风坡入射交叉极化双站散射系数在后向附近增强; 当从两侧坡入射时,双站散射系数以入射面为中心在散射方位角内对称.

关键词: 新月形沙丘, 迎风坡, 背风坡, 电磁散射


A barchan model is simulated by the theory of wind-blown sand dunes. Using the Kirchhoff Approximation based on the discrete element method, electromagnetic scattering coefficients are calculated for the cases of incident wave impinges on the single sand dune along the up-wind slope, the lee slope and the two-side slope face direction, respectively. A comparison of the backscattering coefficients and bistatic scattering coefficients for the four incident directions are made. Numerical results show that co-polarized backscattering coefficients of the lee slope have a local peak value when the incident angle is equal to the repose angle. Cross-polarized bistatic coefficient of the lee slope near the backscattering region is enhanced when the incident angle approaches the repose angle. Bistatic scattering coefficients of two-side slope faces have symmetry with respect to the azimuth angle in the incident plane.

Key words: barchans, up-wind slope, lee slope, electromagnetic scattering


  • O441.4 P931.3